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Cisco IOS XRWorkbookCisco IOS XR Practice Labs
This workbook aims to give network engineers the chance to practice new Cisco
software : IOS XR combined with Cisco IOS software , the workbook mainly focus
on MPLS technologies and different MPLS VPN implementantions using GNS3 to
simulate , its a good preparation guide for both CCNP SP and CCIE SP tracks
2014
Mohammad Khalil CCIE #35484 (RS,SP)
www.nmsboost.com
9/4/2014
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ContentsMPLS L3VPN Static PE-CE ...................................................................... 2
MPLS L3VPN RIPv2 PE-CE .................................................................... 12
MPLS L3VPN OSPF PE-CE ..................................................................... 21
MPLS L3VPN OSPF Sham-link ............................................................... 31
MPLS L3VPN EIGRP PE-CE ................................................................... 41
MPLS L3VPN BGP PE-CE ...................................................................... 51
MPLS Tunneling .................................................................................. 61
Carrier Supporting Carrier (CsC) 1 ........................................................ 71
Carrier supporting Carrier (CsC) 2 ........................................................ 89
MPLS 6VPE Static ............................................................................. 111
MPLS 6VPE OSPF .............................................................................. 128
MPLS 6VPE EIGRP ............................................................................. 145
MPLS 6VPE BGP ................................................................................ 163
Inter-AS Option-A ............................................................................. 180
Inter-AS Option-B ............................................................................. 195
Export Maps ..................................................................................... 208
SNMP .............................................................................................. 220
VPLS ............................................................................................... 224
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MPLS L3VPN Static PE-CE
Network Diagram
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
Static
R1
Static
R4
Initial Configurations
R1interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0duplex autospeed auto
no shutdown
R2interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
ip address 192.168.101.2 255.255.255.0duplex auto
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speed autompls ip
no shutdown
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0speed 100full-duplex
mpls ipno shutdown
R3interface Loopback0ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0ip address 192.168.23.3 255.255.255.0
speed 100full-duplexmpls ip
no shutdown
interface FastEthernet0/1ip address 192.168.34.3 255.255.255.0speed 100full-duplex
no shutdown
R4interface Loopback0ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0ip address 192.168.34.4 255.255.255.0
speed 100full-duplexno shutdown
XR1interface Loopback0
ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0
cdpipv4 address 192.168.102.10 255.255.255.0duplex fullno shutdown
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interface GigabitEthernet0/0/0/2
cdpipv4 address 192.168.101.10 255.255.255.0no shutdown
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Configurations
R1ip route 0.0.0.0 0.0.0.0 192.168.102.10
R2router ospf 1
router-id 2.2.2.2network 2.2.2.2 0.0.0.0 area 0network 192.168.23.2 0.0.0.0 area 0
network 192.168.101.2 0.0.0.0 area 0
mpls label protocol ldp
mpls ldp router-id Loopback0 force
interface FastEthernet0/0
mpls ip
interface FastEthernet0/1mpls ip
R4ip route 0.0.0.0 0.0.0.0 192.168.34.3
R3
ip vrf MSSK
rd 100:1route-target export 100:1
route-target import 100:1
mpls label protocol ldp
mpls ldp router-id Loopback0 force
interface FastEthernet0/0
mpls ip
router ospf 1
router-id 3.3.3.3
network 3.3.3.3 0.0.0.0 area 0network 192.168.23.3 0.0.0.0 area 0
ip route vrf MSSK 4.4.4.4 255.255.255.255 192.168.34.4
router bgp 1no bgp default ipv4-unicast
bgp log-neighbor-changesneighbor 10.10.10.10 remote-as 1
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neighbor 10.10.10.10 update-source Loopback0
address-family vpnv4neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community both
exit-address-family
address-family ipv4 vrf MSSK
network 192.168.34.0 mask 255.255.255.0redistribute staticno synchronizationexit-address-family
XR1
vrf MSSKaddress-family ipv4 unicastimport route-target
100:1
export route-target
100:1
interface GigabitEthernet0/0/0/0vrf MSSKipv4 address 192.168.102.10 255.255.255.0
router ospf 1router-id 10.10.10.10area 0interface Loopback0
interface GigabitEthernet0/0/0/2
router static
vrf MSSKaddress-family ipv4 unicast1.1.1.1/32 192.168.102.1
router bgp 1address-family vpnv4 unicast
neighbor 3.3.3.3remote-as 1
update-source Loopback0address-family vpnv4 unicast
vrf MSSK
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rd 100:1address-family ipv4 unicast
network 192.168.102.0/24redistribute static
mpls ldprouter-id 10.10.10.10interface GigabitEthernet0/0/0/2
Verifications
R1#sh ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2ia - IS-IS inter area, * - candidate default, U - per-user static routeo - ODR, P - periodic downloaded static route
Gateway of last resort is 192.168.102.10 to network 0.0.0.0
1.0.0.0/32 is subnetted, 1 subnetsC 1.1.1.1 is directly connected, Loopback0C 192.168.102.0/24 is directly connected, FastEthernet0/0
S* 0.0.0.0/0 [1/0] via 192.168.102.10
R1#ping 4.4.4.4
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 532/658/764 ms
R1#ping 4.4.4.4 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 548/569/600 ms
R1#traceroute 4.4.4.4 source lo0 numeric
Type escape sequence to abort.
Tracing the route to 4.4.4.4
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1 192.168.102.10 4 msec 184 msec 188 msec2 192.168.101.2 [MPLS: Labels 16/21 Exp 0] 600 msec 560 msec 564 msec
3 192.168.34.3 [MPLS: Label 21 Exp 0] 564 msec 472 msec 472 msec4 192.168.34.4 660 msec 656 msec 664 msec
R4#sh ip routeCodes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2E1 - OSPF external type 1, E2 - OSPF external type 2i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2ia - IS-IS inter area, * - candidate default, U - per-user static routeo - ODR, P - periodic downloaded static route
Gateway of last resort is 192.168.34.3 to network 0.0.0.0
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.4 is directly connected, Loopback0C 192.168.34.0/24 is directly connected, FastEthernet0/0S* 0.0.0.0/0 [1/0] via 192.168.34.3
R4#ping 1.1.1.1
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 628/672/752 ms
R4#ping 1.1.1.1 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:Packet sent with a source address of 4.4.4.4!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 320/656/856 ms
R4#traceroute 1.1.1.1 source lo0 numeric
Type escape sequence to abort.Tracing the route to 1.1.1.1
1 192.168.34.3 132 msec 184 msec 188 msec2 192.168.23.2 [MPLS: Labels 17/16003 Exp 0] 872 msec 660 msec 660 msec
3 192.168.101.10 [MPLS: Label 16003 Exp 0] 688 msec 660 msec 564 msec4 192.168.102.1 692 msec 656 msec 564 msec
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R3#sh ip route vrf MSSK static4.0.0.0/32 is subnetted, 1 subnets
S 4.4.4.4 [1/0] via 192.168.34.4
R3#sh bgp vpnv4 unicast all summary
BGP router identifier 3.3.3.3, local AS number 1BGP table version is 277, main routing table version 2774 network entries using 560 bytes of memory
4 path entries using 272 bytes of memory5/4 BGP path/bestpath attribute entries using 620 bytes of memory1 BGP extended community entries using 24 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBitfield cache entries: current 1 (at peak 2) using 32 bytes of memory
BGP using 1508 total bytes of memoryBGP activity 12/8 prefixes, 14/10 paths, scan interval 15 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd10.10.10.10 4 1 2089 4072 277 0 0 2d19h 2
R3#sh bgp vpnv4 unicast allBGP table version is 277, local router ID is 3.3.3.3Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight PathRoute Distinguisher: 100:1 (default for vrf MSSK)*>i1.1.1.1/32 10.10.10.10 0 100 0 ?*> 4.4.4.4/32 192.168.34.4 0 32768 ?*> 192.168.34.0 0.0.0.0 0 32768 i
*>i192.168.102.0 10.10.10.10 0 100 0 i
R3#sh bgp vpnv4 unicast all neighbors 10.10.10.10 advertised-routes
BGP table version is 277, local router ID is 3.3.3.3Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)*> 4.4.4.4/32 192.168.34.4 0 32768 ?*> 192.168.34.0 0.0.0.0 0 32768 i
Total number of prefixes 2
RP/0/0/CPU0:XR1#sh route vrf MSSK static
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Tue Jun 24 02:12:37.292 UTC
S 1.1.1.1/32 [1/0] via 192.168.102.1, 00:03:47RP/0/0/CPU0:XR1#sh bgp vpnv4 unicast summaryTue Jun 24 02:12:39.952 UTC
BGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secsBGP table state: Active
Table ID: 0x0 RD version: 0BGP main routing table version 35BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVerSpeaker 35 35 35 35 35 35
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd3.3.3.3 0 1 4073 2089 35 0 0 1d10h 2
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicastTue Jun 24 02:12:41.002 UTCBGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secsBGP table state: ActiveTable ID: 0x0 RD version: 0
BGP main routing table version 35BGP scan interval 60 secs
Status codes: s suppressed, d damped, h history, * valid, > besti - internal, r RIB-failure, S stale, N Nexthop-discard
Origin codes: i - IGP, e - EGP, ? - incompleteNetwork Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)
*> 1.1.1.1/32 192.168.102.1 0 32768 ?*>i4.4.4.4/32 3.3.3.3 0 100 0 ?*>i192.168.34.0/24 3.3.3.3 0 100 0 i
*> 192.168.102.0/24 0.0.0.0 0 32768 i
Processed 4 prefixes, 4 paths
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicast neighbors 3.3.3.3 advertised-routesTue Jun 24 02:12:43.012 UTC
Network Next Hop From AS PathRoute Distinguisher: 100:11.1.1.1/32 10.10.10.10 Local ?192.168.102.0/24 10.10.10.10 Local i
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Processed 2 prefixes, 2 paths
R3#debug mpls packetsMPLS packet debugging is on
R3#*Mar 1 03:40:12.883: MPLS: Fa0/0: recvd: CoS=0, TTL=253, Label(s)=19*Mar 1 03:40:12.883: MPLS: Fa0/1: xmit: (no label)
*Mar 1 03:40:13.011: MPLS: Fa0/0: recvd: CoS=0, TTL=253, Label(s)=19*Mar 1 03:40:13.011: MPLS: Fa0/1: xmit: (no label)*Mar 1 03:40:13.083: MPLS: Fa0/0: recvd: CoS=0, TTL=253, Label(s)=19*Mar 1 03:40:13.083: MPLS: Fa0/1: xmit: (no label)*Mar 1 03:40:13.151: MPLS: Fa0/0: recvd: CoS=0, TTL=253, Label(s)=19*Mar 1 03:40:13.151: MPLS: Fa0/1: xmit: (no label)
*Mar 1 03:40:13.207: MPLS: Fa0/0: recvd: CoS=0, TTL=253, Label(s)=19*Mar 1 03:40:13.207: MPLS: Fa0/1: xmit: (no label)
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MPLS L3VPN RIPv2 PE-CE
Network Diagram
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
RIPv2
R1
RIPv2
R4
Initial Configurations
R1interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0duplex autospeed auto
no shutdown
R2interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
ip address 192.168.101.2 255.255.255.0duplex auto
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speed autompls ip
no shutdown
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0speed 100full-duplex
mpls ipno shutdown
R3interface Loopback0ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0ip address 192.168.23.3 255.255.255.0
speed 100full-duplexmpls ip
no shutdown
interface FastEthernet0/1ip address 192.168.34.3 255.255.255.0speed 100full-duplex
no shutdown
R4interface Loopback0ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0ip address 192.168.34.4 255.255.255.0
speed 100full-duplexno shutdown
XR1interface Loopback0
ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0
cdpipv4 address 192.168.102.10 255.255.255.0duplex fullno shutdown
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Configurations
R1router ripversion 2network 1.0.0.0network 192.168.102.0
no auto-summary
R2
router ospf 1router-id 2.2.2.2network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0
network 192.168.101.2 0.0.0.0 area 0
mpls label protocol ldpmpls ldp router-id Loopback0 force
interface FastEthernet0/0mpls ip
interface FastEthernet0/1mpls ip
R4
router ripversion 2
network 4.0.0.0network 192.168.34.0no auto-summary
R3ip vrf MSSK
rd 100:1route-target export 100:1route-target import 100:1
mpls label protocol ldpmpls ldp router-id Loopback0 force
interface FastEthernet0/0
mpls ip
router ospf 1
router-id 3.3.3.3network 3.3.3.3 0.0.0.0 area 0
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network 192.168.23.3 0.0.0.0 area 0
router rip
address-family ipv4 vrf MSSK
redistribute bgp 1 metric 1network 192.168.34.0no auto-summary
version 2exit-address-family
router bgp 1no bgp default ipv4-unicastbgp log-neighbor-changes
neighbor 10.10.10.10 remote-as 1neighbor 10.10.10.10 update-source Loopback0
address-family vpnv4neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community both
exit-address-family
address-family ipv4 vrf MSSKredistribute rip
XR1
vrf MSSKaddress-family ipv4 unicastimport route-target100:1
export route-target100:1
interface GigabitEthernet0/0/0/0vrf MSSKipv4 address 192.168.102.10 255.255.255.0
router ospf 1router-id 10.10.10.10
area 0interface Loopback0
interface GigabitEthernet0/0/0/2
router ripvrf MSSK
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interface GigabitEthernet0/0/0/0
redistribute bgp 1
router bgp 1
address-family vpnv4 unicast
neighbor 3.3.3.3
remote-as 1update-source Loopback0address-family vpnv4 unicast
vrf MSSKrd 100:1
address-family ipv4 unicastredistribute rip
mpls ldprouter-id 10.10.10.10interface GigabitEthernet0/0/0/2
Verifications
R1#sh ip route rip4.0.0.0/32 is subnetted, 1 subnets
R 4.4.4.4 [120/2] via 192.168.102.10, 00:00:41, FastEthernet0/0
R 192.168.34.0/24 [120/1] via 192.168.102.10, 00:00:41, FastEthernet0/0
R1#ping 4.4.4.4 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:Packet sent with a source address of 1.1.1.1!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 568/748/848 ms
R1#traceroute 4.4.4.4 source lo0 numeric
Type escape sequence to abort.Tracing the route to 4.4.4.4
1 192.168.102.10 4 msec 188 msec 208 msec
2 192.168.101.2 [MPLS: Labels 16/21 Exp 0] 752 msec 752 msec 752 msec3 192.168.34.3 [MPLS: Label 21 Exp 0] 572 msec 560 msec 564 msec4 192.168.34.4 748 msec 788 msec 664 msec
R4#sh ip route rip
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Table ID: 0x0 RD version: 0BGP main routing table version 25
BGP scan interval 60 secs
Status codes: s suppressed, d damped, h history, * valid, > best
i - internal, r RIB-failure, S stale, N Nexthop-discardOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)*> 1.1.1.1/32 192.168.102.1 1 32768 ?*>i4.4.4.4/32 3.3.3.3 1 100 0 ?*>i192.168.34.0/24 3.3.3.3 0 100 0 ?*> 192.168.102.0/24 0.0.0.0 0 32768 ?
Processed 4 prefixes, 4 pathsRP/0/0/CPU0:XR1#sh bgp vpnv4 unicast neighbors 3.3.3.3 advertised-routesSun Jun 22 15:56:29.873 UTC
Network Next Hop From AS PathRoute Distinguisher: 100:11.1.1.1/32 10.10.10.10 Local ?
192.168.102.0/24 10.10.10.10 Local ?
Processed 2 prefixes, 2 paths
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MPLS L3VPN OSPF PE-CE
Network Diagram
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
OSPF
R1
OSPF
R4
Initial Configurations
R1interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0duplex autospeed auto
no shutdown
R2interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
ip address 192.168.101.2 255.255.255.0duplex auto
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speed autompls ip
no shutdown
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0speed 100full-duplex
mpls ipno shutdown
R3interface Loopback0ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0ip address 192.168.23.3 255.255.255.0
speed 100full-duplexmpls ip
no shutdown
interface FastEthernet0/1ip address 192.168.34.3 255.255.255.0speed 100full-duplex
no shutdown
R4interface Loopback0ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0ip address 192.168.34.4 255.255.255.0
speed 100full-duplexno shutdown
XR1interface Loopback0
ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0
cdpipv4 address 192.168.102.10 255.255.255.0duplex fullno shutdown
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interface GigabitEthernet0/0/0/2
cdpipv4 address 192.168.101.10 255.255.255.0no shutdown
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Configurations
R1router ospf 2router-id 1.1.1.1log-adjacency-changesnetwork 1.1.1.1 0.0.0.0 area 0
network 192.168.102.1 0.0.0.0 area 0
R2
router ospf 1router-id 2.2.2.2network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0
network 192.168.101.2 0.0.0.0 area 0
mpls label protocol ldpmpls ldp router-id Loopback0 force
interface FastEthernet0/0mpls ip
interface FastEthernet0/1mpls ip
R4
router ospf 2router-id 4.4.4.4
log-adjacency-changesnetwork 4.4.4.4 0.0.0.0 area 0network 192.168.34.4 0.0.0.0 area 0
R3ip vrf MSSK
rd 100:1route-target export 100:1route-target import 100:1
mpls label protocol ldpmpls ldp router-id Loopback0 force
interface FastEthernet0/0
mpls ip
router ospf 1
router-id 3.3.3.3network 3.3.3.3 0.0.0.0 area 0
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network 192.168.23.3 0.0.0.0 area 0
router ospf 2 vrf MSSKredistribute bgp 1 subnetsnetwork 192.168.34.3 0.0.0.0 area 0
router bgp 1no bgp default ipv4-unicast
bgp log-neighbor-changesneighbor 10.10.10.10 remote-as 1neighbor 10.10.10.10 update-source Loopback0
address-family vpnv4neighbor 10.10.10.10 activate
neighbor 10.10.10.10 send-community bothexit-address-family
address-family ipv4 vrf MSSKredistribute ospf 2 vrf MSSKno synchronization
exit-address-family
XR1vrf MSSKaddress-family ipv4 unicastimport route-target
100:1
export route-target100:1
interface GigabitEthernet0/0/0/0vrf MSSKipv4 address 192.168.102.10 255.255.255.0
router ospf 1router-id 10.10.10.10
area 0
interface Loopback0
interface GigabitEthernet0/0/0/2
router ospf 2
vrf MSSKredistribute bgp 1area 0interface GigabitEthernet0/0/0/0
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router bgp 1
address-family vpnv4 unicast
neighbor 3.3.3.3
remote-as 1update-source Loopback0address-family vpnv4 unicast
vrf MSSKrd 100:1address-family ipv4 unicastredistribute ospf 2
mpls ldprouter-id 10.10.10.10interface GigabitEthernet0/0/0/2
Verifications
R1#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface10.10.10.10 1 FULL/BDR 00:00:38 192.168.102.10 FastEthernet0/0
R1#sh ip route ospf
4.0.0.0/32 is subnetted, 1 subnetsO E2 4.4.4.4 [110/2] via 192.168.102.10, 00:45:30, FastEthernet0/0
O E2 192.168.34.0/24 [110/1] via 192.168.102.10, 00:45:30, FastEthernet0/0
R1#sh ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 2)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
1.1.1.1 1.1.1.1 724 0x8000000A 0x00AFB2 2
10.10.10.10 10.10.10.10 2555 0x80000009 0x000825 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum192.168.102.1 1.1.1.1 724 0x80000008 0x0069C8
Type-5 AS External Link States
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Link ID ADV Router Age Seq# Checksum Tag4.4.4.4 10.10.10.10 2555 0x80000008 0x00061B 3489660929
192.168.34.0 10.10.10.10 2555 0x80000008 0x008B1B 3489660929
R1#ping 4.4.4.4 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 480/649/756 ms
R1#traceroute 4.4.4.4 source lo0 numeric
Type escape sequence to abort.Tracing the route to 4.4.4.4
1 192.168.102.10 36 msec 88 msec 188 msec2 192.168.101.2 [MPLS: Labels 16/19 Exp 0] 664 msec 752 msec 660 msec3 192.168.34.3 [MPLS: Label 19 Exp 0] 376 msec 472 msec 376 msec
4 192.168.34.4 848 msec 660 msec 656 msec
R4#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface192.168.34.3 1 FULL/DR 00:00:35 192.168.34.3 FastEthernet0/0
R4#sh ip route ospf1.0.0.0/32 is subnetted, 1 subnets
O E2 1.1.1.1 [110/2] via 192.168.34.3, 00:54:14, FastEthernet0/0O E2 192.168.102.0/24 [110/1] via 192.168.34.3, 00:54:14, FastEthernet0/0
R4#sh ip ospf database
OSPF Router with ID (4.4.4.4) (Process ID 2)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count4.4.4.4 4.4.4.4 860 0x8000000A 0x007F4B 2
192.168.34.3 192.168.34.3 748 0x8000000A 0x00806C 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum192.168.34.3 192.168.34.3 1000 0x80000008 0x00E195
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Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag1.1.1.1 192.168.34.3 1255 0x80000002 0x004409 3489660929192.168.102.0 192.168.34.3 1255 0x80000002 0x005032 3489660929
R4#ping 1.1.1.1 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:Packet sent with a source address of 4.4.4.4!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 472/607/672 ms
R4#traceroute 1.1.1.1 source lo0 numeric
Type escape sequence to abort.
Tracing the route to 1.1.1.1
1 192.168.34.3 228 msec 184 msec 184 msec
2 192.168.23.2 [MPLS: Labels 17/16003 Exp 0] 660 msec 660 msec 664 msec3 192.168.101.10 [MPLS: Label 16003 Exp 0] 752 msec 660 msec 660 msec4 192.168.102.1 560 msec 660 msec 596 msec
R3#sh ip route vrf MSSK ospf
Routing Table: MSSK
4.0.0.0/32 is subnetted, 1 subnetsO 4.4.4.4 [110/2] via 192.168.34.4, 04:11:44, FastEthernet0/1
R3#sh bgp vpnv4 unicast all summaryBGP router identifier 3.3.3.3, local AS number 1BGP table version is 21, main routing table version 21
4 network entries using 560 bytes of memory4 path entries using 272 bytes of memory5/4 BGP path/bestpath attribute entries using 620 bytes of memory
3 BGP extended community entries using 120 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memory
Bitfield cache entries: current 1 (at peak 1) using 32 bytes of memoryBGP using 1604 total bytes of memoryBGP activity 4/0 prefixes, 4/0 paths, scan interval 15 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd10.10.10.10 4 1 129 255 21 0 0 04:08:31 2
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R3#sh bgp vpnv4 unicast allBGP table version is 21, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight PathRoute Distinguisher: 100:1 (default for vrf MSSK)
*>i1.1.1.1/32 10.10.10.10 2 100 0 ?*> 4.4.4.4/32 192.168.34.4 2 32768 ?*> 192.168.34.0 0.0.0.0 0 32768 ?*>i192.168.102.0 10.10.10.10 0 100 0 ?
R3#sh bgp vpnv4 unicast all neighbors 10.10.10.10 advertised-routes
BGP table version is 21, local router ID is 3.3.3.3Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)*> 4.4.4.4/32 192.168.34.4 2 32768 ?*> 192.168.34.0 0.0.0.0 0 32768 ?
Total number of prefixes 2
R3#sh ip vrfName Default RD InterfacesMSSK 100:1 Fa0/1
RP/0/0/CPU0:XR1#sh route vrf MSSK ospf
Thu Jun 19 12:52:32.714 UTC
O 1.1.1.1/32 [110/2] via 192.168.102.1, 02:03:06, GigabitEthernet0/0/0/0
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicast summaryThu Jun 19 12:52:36.424 UTC
BGP router identifier 10.10.10.10, local AS number 1
BGP generic scan interval 60 secsBGP table state: Active
Table ID: 0x0 RD version: 0BGP main routing table version 10BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
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Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVerSpeaker 10 10 10 10 10 10
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd3.3.3.3 0 1 256 129 10 0 0 02:05:46 2
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicastThu Jun 19 12:52:37.074 UTC
BGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secsBGP table state: ActiveTable ID: 0x0 RD version: 0BGP main routing table version 10BGP scan interval 60 secs
Status codes: s suppressed, d damped, h history, * valid, > besti - internal, r RIB-failure, S stale, N Nexthop-discard
Origin codes: i - IGP, e - EGP, ? - incompleteNetwork Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)
*> 1.1.1.1/32 192.168.102.1 2 32768 ?*>i4.4.4.4/32 3.3.3.3 2 100 0 ?*>i192.168.34.0/24 3.3.3.3 0 100 0 ?*> 192.168.102.0/24 0.0.0.0 0 32768 ?
Processed 4 prefixes, 4 paths
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicast neighbors 3.3.3.3 advertised-routesThu Jun 19 12:52:39.094 UTCNetwork Next Hop From AS PathRoute Distinguisher: 100:1
1.1.1.1/32 10.10.10.10 Local ?192.168.102.0/24 10.10.10.10 Local ?
Processed 2 prefixes, 2 pathsRP/0/0/CPU0:XR1#sh vrf MSSKThu Jun 19 12:52:41.274 UTC
VRF RD RT AFI SAFI
MSSK 100:1 import 100:1 IPV4 Unicast
export 100:1 IPV4 Unicast
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MPLS L3VPN OSPF Sham-link
Network Diagram
OSPF OSPF
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
AS200
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
R4
1
192.168.14.0/24
Initial Configurations
R1interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0
duplex autospeed autono shutdown
interface FastEthernet0/0ip address 192.168.14.1 255.255.255.0
speed 100full-duplexno shutdown
R2interface Loopback0ip address 2.2.2.2 255.255.255.255
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interface FastEthernet0/0ip address 192.168.101.2 255.255.255.0
duplex autospeed autompls ip
no shutdown
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0speed 100full-duplexmpls ipno shutdown
R3interface Loopback0ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0ip address 192.168.23.3 255.255.255.0
speed 100full-duplexmpls ipno shutdown
interface FastEthernet0/1
ip address 192.168.34.3 255.255.255.0speed 100full-duplexno shutdown
R4interface Loopback0ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0ip address 192.168.34.4 255.255.255.0
speed 100
full-duplexno shutdown
interface FastEthernet0/1ip address 192.168.14.4 255.255.255.0
speed 100full-duplexno shutdown
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XR1
interface Loopback0ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0cdpipv4 address 192.168.102.10 255.255.255.0
duplex fullno shutdown
interface GigabitEthernet0/0/0/2cdpipv4 address 192.168.101.10 255.255.255.0
no shutdown
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Configurations
Now, we have connected a new link between the CEs with the subnet 192.168.14.0/24
Let us check what happened
R1#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface4.4.4.4 1 FULL/DR 00:00:34 192.168.14.4 FastEthernet0/1
10.10.10.10 1 FULL/BDR 00:00:36 192.168.102.10 FastEthernet0/0
R1#sh ip route ospf
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/2] via 192.168.14.4, 00:01:30, FastEthernet0/1O 192.168.34.0/24 [110/2] via 192.168.14.4, 00:01:30, FastEthernet0/1
We can see now that R1 prefers the backdoor link to reach R4 loopback 0 network
R4#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface1.1.1.1 1 FULL/BDR 00:00:38 192.168.14.1 FastEthernet0/1192.168.34.3 1 FULL/DR 00:00:39 192.168.34.3 FastEthernet0/0
R4#sh ip route ospf
1.0.0.0/32 is subnetted, 1 subnetsO 1.1.1.1 [110/2] via 192.168.14.1, 00:02:00, FastEthernet0/1
O 192.168.102.0/24 [110/11] via 192.168.14.1, 00:02:00, FastEthernet0/1
R1#traceroute 4.4.4.4 source lo0
Type escape sequence to abort.Tracing the route to 4.4.4.4
1 192.168.14.4 32 msec 64 msec 60 msec
R1#sh ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 2)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count1.1.1.1 1.1.1.1 200 0x80000005 0x00B2B0 3
4.4.4.4 4.4.4.4 201 0x80000005 0x00A622 310.10.10.10 10.10.10.10 546 0x80000003 0x00141F 1
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192.168.34.3 192.168.34.3 613 0x80000003 0x008E65 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.14.4 4.4.4.4 201 0x80000001 0x006D2D192.168.34.3 192.168.34.3 793 0x80000001 0x00EF8E192.168.102.1 1.1.1.1 797 0x80000001 0x0077C1
R4#traceroute 1.1.1.1 source lo0
Type escape sequence to abort.Tracing the route to 1.1.1.1
1 192.168.14.1 60 msec 60 msec 64 msec
R4#sh ip ospf database
OSPF Router with ID (4.4.4.4) (Process ID 2)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count1.1.1.1 1.1.1.1 253 0x80000005 0x00B2B0 34.4.4.4 4.4.4.4 252 0x80000005 0x00A622 3
10.10.10.10 10.10.10.10 597 0x80000003 0x00141F 1192.168.34.3 192.168.34.3 664 0x80000003 0x008E65 1
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum192.168.14.4 4.4.4.4 252 0x80000001 0x006D2D192.168.34.3 192.168.34.3 844 0x80000001 0x00EF8E
192.168.102.1 1.1.1.1 849 0x80000001 0x0077C1
R1
interface FastEthernet0/1
ip address 192.168.14.1 255.255.255.0ip ospf cost 1000
ip ospf 2 area 0speed 100full-duplex
R4interface FastEthernet0/1ip address 192.168.14.4 255.255.255.0
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router bgp 1address-family vpnv4 unicast
neighbor 3.3.3.3remote-as 1
update-source Loopback0address-family vpnv4 unicast
vrf MSSKrd 100:1address-family ipv4 unicastnetwork 11.11.11.11/32redistribute ospf 2
R3#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/ - 00:00:34 192.168.23.2 FastEthernet0/010.10.10.10 0 FULL/ - - 11.11.11.11 OSPF_SL04.4.4.4 1 FULL/DR 00:00:39 192.168.34.4 FastEthernet0/1
RP/0/0/CPU0:XR1#sh ospf vrf MSSK neighborSun Apr 27 14:19:16.598 UTC
* Indicates MADJ interface
Neighbors for OSPF 2, VRF MSSK
Neighbor ID Pri State Dead Time Address Interface192.168.34.3 1 FULL/ - - 33.33.33.33 OSPF_SL0
Neighbor is up for 00:03:14
1.1.1.1 1 FULL/BDR 00:00:39 192.168.102.1 GigabitEthernet0/0/0/0Neighbor is up for 00:03:49
Total neighbor count: 2
R1#sh ip route ospf
33.0.0.0/32 is subnetted, 1 subnets
O E2 33.33.33.33 [110/1] via 192.168.102.10, 00:03:56, FastEthernet0/04.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4 [110/13] via 192.168.102.10, 00:03:30, FastEthernet0/011.0.0.0/32 is subnetted, 1 subnets
O E2 11.11.11.11 [110/1] via 192.168.102.10, 00:03:30, FastEthernet0/0
O 192.168.34.0/24 [110/12] via 192.168.102.10, 00:03:30, FastEthernet0/0
R1#ping 4.4.4.4 source lo0
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Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 32/76/124 ms
R1#traceroute 4.4.4.4 source lo0
Type escape sequence to abort.Tracing the route to 4.4.4.4
1 192.168.102.10 32 msec 64 msec 0 msec2 192.168.101.2 [MPLS: Labels 17/25 Exp 0] 68 msec 52 msec 44 msec3 192.168.34.3 [MPLS: Label 25 Exp 0] 52 msec 64 msec 32 msec
4 192.168.34.4 64 msec 64 msec 64 msec
R1#sh ip ospf database
OSPF Router with ID (1.1.1.1) (Process ID 2)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count1.1.1.1 1.1.1.1 267 0x80000009 0x00F278 34.4.4.4 4.4.4.4 267 0x8000000A 0x0034A3 310.10.10.10 10.10.10.10 232 0x8000000C 0x00245D 2
192.168.34.3 192.168.34.3 233 0x80000006 0x005D4F 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
192.168.14.4 4.4.4.4 272 0x80000001 0x006D2D192.168.34.4 4.4.4.4 272 0x80000001 0x007487192.168.102.10 10.10.10.10 264 0x80000003 0x000AFF
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
11.11.11.11 192.168.34.3 243 0x80000001 0x006EB8 348966092933.33.33.33 10.10.10.10 262 0x80000005 0x004EE2 3489660929
33.33.33.33 192.168.34.3 267 0x80000003 0x00725A 3489660929
R4#sh ip route ospf
1.0.0.0/32 is subnetted, 1 subnetsO 1.1.1.1 [110/4] via 192.168.34.3, 00:03:58, FastEthernet0/0
33.0.0.0/32 is subnetted, 1 subnetsO E2 33.33.33.33 [110/1] via 192.168.34.3, 00:04:24, FastEthernet0/0
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11.0.0.0/32 is subnetted, 1 subnetsO E2 11.11.11.11 [110/1] via 192.168.34.3, 00:04:13, FastEthernet0/0
O 192.168.102.0/24 [110/3] via 192.168.34.3, 00:03:58, FastEthernet0/0R4#ping 1.1.1.1 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:Packet sent with a source address of 4.4.4.4
!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 160/192/224 ms
R4#traceroute 1.1.1.1 source lo0
Type escape sequence to abort.
Tracing the route to 1.1.1.1
1 192.168.34.3 68 msec 40 msec 64 msec
2 192.168.23.2 [MPLS: Labels 16/16004 Exp 0] 176 msec 176 msec 192 msec3 192.168.101.10 [MPLS: Label 16004 Exp 0] 216 msec 160 msec 192 msec4 192.168.102.1 180 msec 192 msec 184 msec
R4#sh ip ospf database
OSPF Router with ID (4.4.4.4) (Process ID 2)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count1.1.1.1 1.1.1.1 294 0x80000009 0x00F278 34.4.4.4 4.4.4.4 293 0x8000000A 0x0034A3 310.10.10.10 10.10.10.10 260 0x8000000C 0x00245D 2
192.168.34.3 192.168.34.3 258 0x80000006 0x005D4F 2
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum192.168.14.4 4.4.4.4 298 0x80000001 0x006D2D
192.168.34.4 4.4.4.4 298 0x80000001 0x007487
192.168.102.10 10.10.10.10 291 0x80000003 0x000AFF
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
11.11.11.11 192.168.34.3 269 0x80000001 0x006EB8 348966092933.33.33.33 10.10.10.10 290 0x80000005 0x004EE2 348966092933.33.33.33 192.168.34.3 293 0x80000003 0x00725A 3489660929
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R1#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface4.4.4.4 1 FULL/DR 00:00:37 192.168.14.4 FastEthernet0/110.10.10.10 1 FULL/DR 00:00:39 192.168.102.10 FastEthernet0/0
R4#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface1.1.1.1 1 FULL/BDR 00:00:36 192.168.14.1 FastEthernet0/1192.168.34.3 1 FULL/BDR 00:00:32 192.168.34.3 FastEthernet0/0
R1#sh ip ospf interface fastEthernet 0/1 | inc CostProcess ID 2, Router ID 1.1.1.1, Network Type BROADCAST, Cost: 1000
R4#sh ip ospf interface fastEthernet 0/1 | inc CostProcess ID 2, Router ID 4.4.4.4, Network Type BROADCAST, Cost: 1000
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MPLS L3VPN EIGRP PE-CE
Network Diagram
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
EIGRP
R1
EIGRP
R4
Initial Configurations
R1interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0duplex autospeed auto
no shutdown
R2interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
ip address 192.168.101.2 255.255.255.0duplex auto
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speed autompls ip
no shutdown
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0speed 100full-duplex
mpls ipno shutdown
R3interface Loopback0ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0ip address 192.168.23.3 255.255.255.0
speed 100full-duplexmpls ip
no shutdown
interface FastEthernet0/1ip address 192.168.34.3 255.255.255.0speed 100full-duplex
no shutdown
R4interface Loopback0ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0ip address 192.168.34.4 255.255.255.0
speed 100full-duplexno shutdown
XR1interface Loopback0
ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0
cdpipv4 address 192.168.102.10 255.255.255.0duplex fullno shutdown
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interface GigabitEthernet0/0/0/2
cdpipv4 address 192.168.101.10 255.255.255.0no shutdown
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Configurations
R1router eigrp 100network 1.1.1.1 0.0.0.0network 192.168.102.1 0.0.0.0no auto-summary
R2router ospf 1
router-id 2.2.2.2network 2.2.2.2 0.0.0.0 area 0network 192.168.23.2 0.0.0.0 area 0
network 192.168.101.2 0.0.0.0 area 0
mpls label protocol ldp
mpls ldp router-id Loopback0 force
interface FastEthernet0/0mpls ip
interface FastEthernet0/1mpls ip
R4
router eigrp 100
network 4.4.4.4 0.0.0.0network 192.168.34.4 0.0.0.0
no auto-summary
R3
ip vrf MSSKrd 100:1route-target export 100:1
route-target import 100:1
mpls label protocol ldp
mpls ldp router-id Loopback0 force
interface FastEthernet0/0mpls ip
router ospf 1router-id 3.3.3.3network 3.3.3.3 0.0.0.0 area 0
network 192.168.23.3 0.0.0.0 area 0
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router eigrp 1address-family ipv4 vrf MSSK
redistribute bgp 1network 192.168.34.3 0.0.0.0default-metric 1000 1000 255 1 1500
no auto-summaryautonomous-system 100
router bgp 1no bgp default ipv4-unicastbgp log-neighbor-changesneighbor 10.10.10.10 remote-as 1neighbor 10.10.10.10 update-source Loopback0
address-family vpnv4neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community both
exit-address-family
address-family ipv4 vrf MSSK
redistribute eigrp 100
XR1vrf MSSKaddress-family ipv4 unicastimport route-target
100:1
export route-target100:1
interface GigabitEthernet0/0/0/0vrf MSSKipv4 address 192.168.102.10 255.255.255.0
router ospf 1router-id 10.10.10.10
area 0
interface Loopback0
interface GigabitEthernet0/0/0/2
router eigrp 1
vrf MSSKaddress-family ipv4default-metric 1000 1000 255 1 1500autonomous-system 100
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redistribute bgp 1interface GigabitEthernet0/0/0/0
router bgp 1address-family vpnv4 unicast
neighbor 3.3.3.3remote-as 1
update-source Loopback0address-family vpnv4 unicast
vrf MSSKrd 100:1address-family ipv4 unicast
redistribute eigrp 100
mpls ldp
router-id 10.10.10.10interface GigabitEthernet0/0/0/2
Verifications
R1#sh ip route eigrp4.0.0.0/32 is subnetted, 1 subnets
D 4.4.4.4 [90/412160] via 192.168.102.10, 00:01:34, FastEthernet0/0
D 192.168.34.0/24 [90/284160] via 192.168.102.10, 00:01:34, FastEthernet0/0
R1#ping 4.4.4.4 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 508/665/936 ms
R1#traceroute 4.4.4.4 source lo0 numeric
Type escape sequence to abort.
Tracing the route to 4.4.4.4
1 192.168.102.10 192 msec 92 msec 88 msec2 192.168.101.2 [MPLS: Labels 16/19 Exp 0] 692 msec 972 msec 664 msec
3 192.168.34.3 [MPLS: Label 19 Exp 0] 468 msec 564 msec 372 msec4 192.168.34.4 564 msec 564 msec 784 msec
R4#sh ip route eigrp1.0.0.0/32 is subnetted, 1 subnets
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D 1.1.1.1 [90/156416] via 192.168.34.3, 00:01:39, FastEthernet0/0D 192.168.102.0/24 [90/28416] via 192.168.34.3, 00:01:39, FastEthernet0/0
R4#ping 1.1.1.1 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:Packet sent with a source address of 4.4.4.4
!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 280/372/448 ms
R4#traceroute 1.1.1.1 source lo0 numeric
Type escape sequence to abort.
Tracing the route to 1.1.1.1
1 192.168.34.3 36 msec 188 msec 92 msec
2 192.168.23.2 [MPLS: Labels 17/16003 Exp 0] 468 msec 472 msec 400 msec3 192.168.101.10 [MPLS: Label 16003 Exp 0] 380 msec 280 msec 752 msec4 192.168.102.1 280 msec 472 msec 376 msec
R3#sh ip eigrp vrf MSSK interfacesIP-EIGRP interfaces for process 100
Xmit Queue Mean Pacing Time Multicast PendingInterface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Fa0/1 1 0/0 298 0/1 1352 0
R3#sh ip eigrp vrf MSSK neighborsIP-EIGRP neighbors for process 100H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num0 192.168.34.4 Fa0/1 10 00:09:17 298 1788 0 3
R3#sh ip route vrf MSSK eigrp4.0.0.0/32 is subnetted, 1 subnets
D 4.4.4.4 [90/156160] via 192.168.34.4, 00:09:22, FastEthernet0/1
R3#sh bgp vpnv4 unicast all summaryBGP router identifier 3.3.3.3, local AS number 1
BGP table version is 9, main routing table version 94 network entries using 560 bytes of memory4 path entries using 272 bytes of memory
5/4 BGP path/bestpath attribute entries using 620 bytes of memory4 BGP extended community entries using 240 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memory
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Bitfield cache entries: current 1 (at peak 1) using 32 bytes of memoryBGP using 1724 total bytes of memory
BGP activity 4/0 prefixes, 4/0 paths, scan interval 15 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.10.10.10 4 1 11 20 9 0 0 00:12:26 2
R3#sh bgp vpnv4 unicast all
BGP table version is 9, local router ID is 3.3.3.3Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)*>i1.1.1.1/32 10.10.10.10 2570240 100 0 ?*> 4.4.4.4/32 192.168.34.4 156160 32768 ?
*> 192.168.34.0 0.0.0.0 0 32768 ?*>i192.168.102.0 10.10.10.10 0 100 0 ?
R3#sh bgp vpnv4 unicast all neighbors 10.10.10.10 advertised-routesBGP table version is 9, local router ID is 3.3.3.3Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight PathRoute Distinguisher: 100:1 (default for vrf MSSK)*> 4.4.4.4/32 192.168.34.4 156160 32768 ?*> 192.168.34.0 0.0.0.0 0 32768 ?
Total number of prefixes 2
RP/0/0/CPU0:XR1#sh eigrp vrf MSSK interfaces
Sun Jun 22 15:42:32.111 UTC
IPv4-EIGRP Interfaces for AS(100)
Xmit Queue Mean Pacing Time Multicast PendingInterface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Gi0/0/0/0 1 0/0 69 0/10 320 0
RP/0/0/CPU0:XR1#sh eigrp vrf MSSK neighbors
Sun Jun 22 15:42:33.631 UTC
IPv4-EIGRP Neighbors for AS(100) VRF MSSK
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H Address Interface Hold Uptime SRTT RTO Q Seq(sec) (ms) Cnt Num
0 192.168.102.1 Gi0/0/0/0 13 00:02:24 69 414 0 9
RP/0/0/CPU0:XR1#sh route vrf MSSK eigrp
Sun Jun 22 15:42:36.431 UTC
D 1.1.1.1/32 [90/2570240] via 192.168.102.1, 00:02:09, GigabitEthernet0/0/0/0
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicast summarySun Jun 22 15:42:39.790 UTCBGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secsBGP table state: ActiveTable ID: 0x0 RD version: 0
BGP main routing table version 8BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVer
Speaker 8 8 8 8 8 8
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd3.3.3.3 0 1 21 12 8 0 0 00:07:31 2
RP/0/0/CPU0:XR1#sh bgp vpnv4 unicast
Sun Jun 22 15:42:41.700 UTCBGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secsBGP table state: ActiveTable ID: 0x0 RD version: 0
BGP main routing table version 8BGP scan interval 60 secs
Status codes: s suppressed, d damped, h history, * valid, > besti - internal, r RIB-failure, S stale, N Nexthop-discard
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 100:1 (default for vrf MSSK)*> 1.1.1.1/32 192.168.102.1 2570240 32768 ?
*>i4.4.4.4/32 3.3.3.3 156160 100 0 ?*>i192.168.34.0/24 3.3.3.3 0 100 0 ?*> 192.168.102.0/24 0.0.0.0 0 32768 ?
Processed 4 prefixes, 4 pathsRP/0/0/CPU0:XR1#sh bgp vpnv4 unicast neighbors 3.3.3.3 advertised-routesSun Jun 22 15:42:43.790 UTC
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Network Next Hop From AS PathRoute Distinguisher: 100:1
1.1.1.1/32 10.10.10.10 Local ?192.168.102.0/24 10.10.10.10 Local ?
Processed 2 prefixes, 2 paths
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MPLS L3VPN BGP PE-CE
Network Diagram
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
BGP
R1
BGP
R4
S2 AS2
Initial Configurations
R1interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0
duplex autospeed autono shutdown
R2interface Loopback0ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0ip address 192.168.101.2 255.255.255.0
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duplex autospeed auto
mpls ipno shutdown
interface FastEthernet0/1ip address 192.168.23.2 255.255.255.0speed 100
full-duplexmpls ipno shutdown
R3interface Loopback0
ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0
ip address 192.168.23.3 255.255.255.0speed 100full-duplex
mpls ipno shutdown
interface FastEthernet0/1ip address 192.168.34.3 255.255.255.0speed 100
full-duplexno shutdown
R4interface Loopback0
ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0
ip address 192.168.34.4 255.255.255.0speed 100full-duplex
no shutdown
XR1
interface Loopback0ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0cdpipv4 address 192.168.102.10 255.255.255.0duplex full
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Configurations
R1router bgp 2no bgp default ipv4-unicastneighbor 192.168.102.10 remote-as 1address-family ipv4 unicast
neighbor 192.168.102.10 activatenetwork 1.1.1.1 mask 255.255.255.255
R2router ospf 1router-id 2.2.2.2
network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0network 192.168.101.2 0.0.0.0 area 0
mpls label protocol ldpmpls ldp router-id Loopback0 force
interface FastEthernet0/0mpls ip
interface FastEthernet0/1mpls ip
R4router bgp 2
no bgp default ipv4-unicastneighbor 192.168.34.3 remote-as 1address-family ipv4 unicast
neighbor 192.168.34.3 activatenetwork 4.4.4.4 mask 255.255.255.255
R3ip vrf MSSKrd 100:1
route-target export 100:1
route-target import 100:1
mpls label protocol ldpmpls ldp router-id Loopback0 force
interface FastEthernet0/0mpls ip
router ospf 1
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router-id 3.3.3.3network 3.3.3.3 0.0.0.0 area 0
network 192.168.23.3 0.0.0.0 area 0
router bgp 1
no bgp default ipv4-unicastbgp log-neighbor-changesneighbor 10.10.10.10 remote-as 1
neighbor 10.10.10.10 update-source Loopback0
address-family vpnv4neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community bothexit-address-family
address-family ipv4 vrf MSSKneighbor 192.168.34.4 remote-as 2
neighbor 192.168.34.4 activate
XR1
vrf MSSKaddress-family ipv4 unicastimport route-target100:1
export route-target
100:1
interface GigabitEthernet0/0/0/0vrf MSSKipv4 address 192.168.102.10 255.255.255.0
router ospf 1router-id 10.10.10.10
area 0interface Loopback0
interface GigabitEthernet0/0/0/2
router bgp 1
address-family vpnv4 unicast
neighbor 3.3.3.3
remote-as 1update-source Loopback0address-family vpnv4 unicast
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vrf MSSKrd 100:1
address-family ipv4 unicast
neighbor 192.168.102.1
remote-as 2address-family ipv4 unicast
mpls ldprouter-id 10.10.10.10interface GigabitEthernet0/0/0/2
Verifications
R1#sh ip bgp summaryBGP router identifier 1.1.1.1, local AS number 2
BGP table version is 2, main routing table version 21 network entries using 120 bytes of memory1 path entries using 52 bytes of memory2/1 BGP path/bestpath attribute entries using 248 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBitfield cache entries: current 1 (at peak 1) using 32 bytes of memoryBGP using 452 total bytes of memoryBGP activity 1/0 prefixes, 1/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd192.168.102.10 4 1 3 5 2 0 0 00:00:31 0
As can be seen that there are no routes received from XR1 (PE)
RP/0/0/CPU0:XR1#sh bgp vrf MSSK summaryTue Jun 24 02:52:41.698 UTCBGP VRF MSSK, state: Active
BGP Route Distinguisher: 100:1VRF ID: 0x60000002BGP router identifier 10.10.10.10, local AS number 1
BGP table state: Active
Table ID: 0xe0000002 RD version: 41BGP main routing table version 41
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVerSpeaker 41 41 41 41 41 41
Some configured eBGP neighbors (under default or non-default vrfs)
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do not have both inbound and outbound policies configured for IPv4 Unicastaddress family. These neighbors will default to sending and/or
receiving no routes and are marked with '!' in the output below.Use the 'show bgp neighbor ' command for details.
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd192.168.102.1 0 2 6 3 41 0 0 00:00:58 0!
We can see the ! mark which means that no routes will advertised or received from thisneighbor due to the default policy which will drop all prefixes
RP/0/0/CPU0:XR1#sh bgp vrf MSSK neighbors 192.168.102.1 | include policTue Jun 24 02:53:15.675 UTC
eBGP neighbor with no inbound or outbound policy; defaults to 'drop'
No policy: 1, Failed RT match: 0By ORF policy: 0, By policy: 0
So , we have to define a route-policy that will allow the routes exchange
XR1
route-policy PASSpass
router bgp 1vrf MSSKneighbor 192.168.102.1
address-family ipv4 unicastroute-policy PASS inroute-policy PASS out
RP/0/0/CPU0:XR1#sh bgp vrf MSSK summary
Tue Jun 24 02:54:28.420 UTCBGP VRF MSSK, state: ActiveBGP Route Distinguisher: 100:1
VRF ID: 0x60000002BGP router identifier 10.10.10.10, local AS number 1BGP table state: Active
Table ID: 0xe0000002 RD version: 42
BGP main routing table version 42
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVer
Speaker 42 42 42 42 42 42
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd192.168.102.1 0 2 10 6 42 0 0 00:02:45 1
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R1#sh ip bgp summary
BGP router identifier 1.1.1.1, local AS number 2BGP table version is 2, main routing table version 21 network entries using 120 bytes of memory
1 path entries using 52 bytes of memory2/1 BGP path/bestpath attribute entries using 248 bytes of memory0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memoryBitfield cache entries: current 1 (at peak 1) using 32 bytes of memoryBGP using 452 total bytes of memoryBGP activity 1/0 prefixes, 1/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
192.168.102.10 4 1 6 10 2 0 0 00:04:52 0
Still we do not receive any routes , what new about IOS XR is that we need to add a
/32 route for the labled next-hop address
XR1
router staticvrf MSSKaddress-family ipv4 unicast192.168.102.1/32 GigabitEthernet0/0/0/0
And still there are no routes , let us turn some debugging on R4 and softly clear the
session
R4#debug ip bgp updatesBGP updates debugging is on for address family: IPv4 UnicastR4#clear ip bgp * soft in
R4#*Mar 3 21:13:29.218: BGP(0): 192.168.34.3 rcv UPDATE w/ attr: nexthop192.168.34.3, origin i, originator 0.0.0.0, path 1 2, community , extended community
*Mar 3 21:13:29.226: BGP(0): 192.168.34.3 rcv UPDATE about 1.1.1.1/32 -- DENIEDdue to: AS-PATH contains our own AS;
So , R4 will not install any updates originated from R1 because its originated from the
same AS R4 resides in
R3router bgp 1address-family ipv4 vrf MSSK
neighbor 192.168.34.4 as-override
*Mar 3 21:15:15.974: BGP(0): 192.168.34.3 send UPDATE (format) 4.4.4.4/32, next192.168.34.4, metric 0, path Local
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Note that we cannot reach using the physical links between our CEs and PEs becausewe did not advertise them into BGP
R4#sh ip bgpBGP table version is 7, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path*> 1.1.1.1/32 192.168.34.3 0 1 1 i*> 4.4.4.4/32 0.0.0.0 0 32768 i
R4#ping 1.1.1.1 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
Packet sent with a source address of 4.4.4.4!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 576/688/784 ms
R1#ping 4.4.4.4
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:.....
Success rate is 0 percent (0/5)
R3router bgp 1address-family ipv4 vrf MSSK
network 192.168.34.0 mask 255.255.255.0
XR1
router bgp 1vrf MSSKaddress-family ipv4 unicast
network 192.168.102.0/24
R1#ping 4.4.4.4
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 568/684/772 ms
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MPLS Tunneling
Network Diagram
XR1
R2
R3
192.168.102.0/24
192.168.101.0/24 192.168.23.0/24
192.168.34.0/24
OSPF A0
AS1
Lo0 1.1.1.1/32
Lo0 3.3.3.3/32
Lo0 4.4.4.4/32
10.10.10.10/32
Lo0 2.2.2.2/32
BGP
R1
BGP
R4
S10 AS40
Initial Configurations
R1
interface Loopback0ip address 1.1.1.1 255.255.255.255
interface FastEthernet0/0ip address 192.168.102.1 255.255.255.0
duplex autospeed autono shutdown
R2
interface Loopback0ip address 2.2.2.2 255.255.255.255
interface FastEthernet0/0
ip address 192.168.101.2 255.255.255.0duplex autospeed autompls ipno shutdown
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interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0speed 100full-duplex
mpls ipno shutdown
R3interface Loopback0ip address 3.3.3.3 255.255.255.255
interface FastEthernet0/0ip address 192.168.23.3 255.255.255.0
speed 100full-duplexmpls ip
no shutdown
interface FastEthernet0/1
ip address 192.168.34.3 255.255.255.0speed 100full-duplexno shutdown
R4
interface Loopback0ip address 4.4.4.4 255.255.255.255
interface FastEthernet0/0ip address 192.168.34.4 255.255.255.0
speed 100full-duplexno shutdown
XR1interface Loopback0
ipv4 address 10.10.10.10 255.255.255.0
interface GigabitEthernet0/0/0/0
cdpipv4 address 192.168.102.10 255.255.255.0duplex full
no shutdown
interface GigabitEthernet0/0/0/2cdp
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ipv4 address 192.168.101.10 255.255.255.0no shutdown
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Configurations
R1router bgp 10no bgp default ipv4-unicastbgp log-neighbor-changesneighbor 192.168.102.10 remote-as 1
address-family ipv4neighbor 192.168.102.10 activate
no auto-summaryno synchronizationnetwork 1.1.1.1 mask 255.255.255.255
exit-address-family
R4
router bgp 40no bgp default ipv4-unicastbgp log-neighbor-changesneighbor 192.168.34.3 remote-as 1
address-family ipv4neighbor 192.168.34.3 activateno auto-summaryno synchronization
network 4.4.4.4 mask 255.255.255.255
exit-address-family
R3router bgp 1no bgp default ipv4-unicast
bgp log-neighbor-changesneighbor 10.10.10.10 remote-as 1neighbor 10.10.10.10 update-source Loopback0
neighbor 192.168.34.4 remote-as 40
address-family ipv4
neighbor 10.10.10.10 activate
neighbor 10.10.10.10 next-hop-selfneighbor 192.168.34.4 activateno auto-summaryno synchronization
exit-address-family
address-family vpnv4
neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community both
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FastEthernet0/1, Src IP addr: 192.168.23.3Addresses bound to peer LDP Ident:
192.168.23.3 3.3.3.3 192.168.34.3
R3#sh mpls interfaces
Interface IP Tunnel OperationalFastEthernet0/0 Yes (ldp) No Yes
R3#sh mpls ldp neighborPeer LDP Ident: 2.2.2.2:0; Local LDP Ident 3.3.3.3:0
TCP connection: 2.2.2.2.646 - 3.3.3.3.12506State: Oper; Msgs sent/rcvd: 266/261; DownstreamUp time: 03:42:03LDP discovery sources:
FastEthernet0/0, Src IP addr: 192.168.23.2Addresses bound to peer LDP Ident:192.168.101.2 192.168.23.2 2.2.2.2
RP/0/0/CPU0:XR1#show mpls interfacesSun Apr 27 15:57:58.622 UTC
Interface LDP Tunnel Static Enabled-------------------------- -------- -------- -------- --------GigabitEthernet0/0/0/2 Yes No No Yes
RP/0/0/CPU0:XR1#show mpls ldp neighborSun Apr 27 15:58:00.832 UTC
Peer LDP Identifier: 2.2.2.2:0TCP connection: 2.2.2.2:646 - 10.10.10.10:20151Graceful Restart: NoSession Holdtime: 180 sec
State: Oper; Msgs sent/rcvd: 276/284; Downstream-UnsolicitedUp time: 03:53:32LDP Discovery Sources:
GigabitEthernet0/0/0/2Addresses bound to this peer:
2.2.2.2 192.168.23.2 192.168.101.2
R1#sh ip bgp summaryBGP router identifier 1.1.1.1, local AS number 10
BGP table version is 5, main routing table version 52 network entries using 240 bytes of memory2 path entries using 104 bytes of memory
3/2 BGP path/bestpath attribute entries using 372 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memory
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Bitfield cache entries: current 1 (at peak 1) using 32 bytes of memoryBGP using 772 total bytes of memory
BGP activity 2/0 prefixes, 3/1 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
192.168.102.10 4 1 16 17 5 0 0 00:12:05 1R1#sh ip bgpBGP table version is 5, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path*> 1.1.1.1/32 0.0.0.0 0 32768 i
*> 4.4.4.4/32 192.168.102.10 0 1 40 i
R4#sh ip bgp summary
BGP router identifier 4.4.4.4, local AS number 40BGP table version is 5, main routing table version 52 network entries using 240 bytes of memory
2 path entries using 104 bytes of memory3/2 BGP path/bestpath attribute entries using 372 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBitfield cache entries: current 1 (at peak 1) using 32 bytes of memory
BGP using 772 total bytes of memoryBGP activity 3/1 prefixes, 3/1 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd192.168.34.3 4 1 20 18 5 0 0 00:13:17 1
R4#sh ip bgpBGP table version is 5, local router ID is 4.4.4.4Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 192.168.34.3 0 1 10 i*> 4.4.4.4/32 0.0.0.0 0 32768 i
R3#sh ip bgp summary
BGP router identifier 3.3.3.3, local AS number 1BGP table version is 5, main routing table version 52 network entries using 240 bytes of memory2 path entries using 104 bytes of memory
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3/2 BGP path/bestpath attribute entries using 372 bytes of memory2 BGP AS-PATH entries using 48 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBitfield cache entries: current 2 (at peak 3) using 64 bytes of memory
BGP using 828 total bytes of memoryBGP activity 15/13 prefixes, 42/40 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd10.10.10.10 4 1 271 284 5 0 0 00:02:58 1192.168.34.4 4 40 18 20 5 0 0 00:13:33 1R3#sh ip bgpBGP table version is 5, local router ID is 3.3.3.3Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S StaleOrigin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path*>i1.1.1.1/32 10.10.10.10 0 100 0 10 i*> 4.4.4.4/32 192.168.34.4 0 0 40 i
RP/0/0/CPU0:XR1#sh bgp ipv4 unicast summarySun Apr 27 15:59:06.457 UTCBGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secsBGP table state: Active
Table ID: 0xe0000000 RD version: 5BGP main routing table version 5BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVerSpeaker 5 5 5 5 5 5
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd3.3.3.3 0 1 284 272 5 0 0 00:03:09 1
192.168.102.1 0 10 17 17 5 0 0 00:12:25 1
RP/0/0/CPU0:XR1#sh bgp ipv4 unicast
Sun Apr 27 15:59:07.957 UTCBGP router identifier 10.10.10.10, local AS number 1BGP generic scan interval 60 secs
BGP table state: ActiveTable ID: 0xe0000000 RD version: 5BGP main routing table version 5BGP scan interval 60 secs
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Status codes: s suppressed, d damped, h history, * valid, > best
i - internal, r RIB-failure, S stale, N Nexthop-discardOrigin codes: i - IGP, e - EGP, ? - incompleteNetwork Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 192.168.102.1 0 0 10 i*>i4.4.4.4/32 3.3.3.3 0 100 0 40 i
Processed 2 prefixes, 2 paths
R3#show mpls forwarding-tableLocal Outgoing Prefix Bytes tag Outgoing Next Hoptag tag or VC or Tunnel Id switched interface16 Pop tag 2.2.2.2/32 0 Fa0/0 192.168.23.2
17 16 10.10.10.10/32 0 Fa0/0 192.168.23.218 Pop tag 192.168.101.0/24 0 Fa0/0 192.168.23.2
RP/0/0/CPU0:XR1#show mpls forwardingSun Apr 27 15:59:41.095 UTC
Local Outgoing Prefix Outgoing Next Hop BytesLabel Label or ID Interface Switched------ ----------- ------------------ ------------ --------------- ------------16001 Pop 2.2.2.2/32 Gi0/0/0/2 192.168.101.2 1279716002 Pop 192.168.23.0/24 Gi0/0/0/2 192.168.101.2 016003 17 3.3.3.3/32 Gi0/0/0/2 192.168.101.2 20720
R1#ping 4.4.4.4 source lo0
Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 172/186/192 ms
R1#traceroute 4.4.4.4 source lo0
Type escape sequence to abort.
Tracing the route to 4.4.4.4
1 192.168.102.10 32 msec 28 msec 28 msec2 192.168.101.2 [MPLS: Label 17 Exp 0] 160 msec 96 msec 188 msec3 192.168.23.3 128 msec 132 msec 132 msec
4 192.168.34.4 196 msec 180 msec 176 msec
R4#ping 1.1.1.1 source lo0
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Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
Packet sent with a source address of 4.4.4.4!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 164/190/220 ms
R4#traceroute 1.1.1.1 source lo0
Type escape sequence to abort.Tracing the route to 1.1.1.1
1 192.168.34.3 64 msec 64 msec 44 msec2 192.168.23.2 [MPLS: Label 16 Exp 0] 164 msec 156 msec 160 msec3 192.168.101.10 160 msec 160 msec 160 msec
4 192.168.102.1 188 msec 192 msec 192 msec
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Carrier Supporting Carrier (CsC) 1
Network Diagram
XR1
R2
R3
192.
16
8.
102.
0/24
192.168.101.0/24 192.168.23.0/24
192.
168.
34.
0/24
R1
192.
168.
15.
0/24
R5
192.
168.46.
0/24
R4
R6
AS 1
AS 14
AS 14
Initial Configurations
R1interface FastEthernet1/0
ip address 192.168.102.1 255.255.255.0speed autoduplex autono shutdown
interface FastEthernet1/1ip address 192.168.15.1 255.255.255.0speed 100duplex fullno shutdown
interface Loopback0
ip address 1.1.1.1 255.255.255.255
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R2interface FastEthernet1/0
ip address 192.168.101.2 255.255.255.0speed autoduplex auto
no shutdown
interface FastEthernet1/1
ip address 192.168.23.2 255.255.255.0speed 100duplex fullno shutdown
interface Loopback0
ip address 2.2.2.2 255.255.255.255
R3
interface FastEthernet1/0ip address 192.168.23.3 255.255.255.0speed 100
duplex fullno shutdown
interface FastEthernet1/1ip address 192.168.34.3 255.255.255.0speed 100
duplex fullno shutdown
interface Loopback0ip address 3.3.3.3 255.255.255.255
R4interface FastEthernet1/0
ip address 192.168.34.4 255.255.255.0speed 100duplex full
no shutdown
interface FastEthernet1/1
ip address 192.168.46.4 255.255.255.0speed 100duplex full
no shutdown
interface Loopback0ip address 4.4.4.4 255.255.255.255
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R5interface FastEthernet1/0
ip address 192.168.15.5 255.255.255.0duplex fullspeed 100
no shutdown
interface Loopback0
ip address 5.5.5.5 255.255.255.255
R6interface FastEthernet1/0ip address 192.168.46.6 255.255.255.0speed 100
duplex fullno shutdown
interface Loopback0ip address 6.6.6.6 255.255.255.255
RP/0/0/CPU0:XR1hostname XR1cdp
interface Loopback0ipv4 address 10.10.10.10 255.255.255.255
interface GigabitEthernet0/0/0/0cdpipv4 address 192.168.102.10 255.255.255.0duplex full
interface GigabitEthernet0/0/0/2cdp
ipv4 address 192.168.101.10 255.255.255.0
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Configurations
R1interface FastEthernet1/0ip address 192.168.102.1 255.255.255.0speed autoduplex auto
mpls bgp forwarding
interface FastEthernet1/1
vrf forwarding ABCip address 192.168.15.1 255.255.255.0speed 100
duplex full
interface Loopback0
ip address 1.1.1.1 255.255.255.255
vrf definition ABCrd 200:1
address-family ipv4route-target export 200:1route-target import 200:1exit-address-family
router ospf 56 vrf ABCrouter-id 1.1.1.1
redistribute bgp 14 subnetsnetwork 192.168.15.1 0.0.0.0 area 0
router bgp 14bgp log-neighbor-changesno bgp default ipv4-unicast
neighbor 4.4.4.4 remote-as 14neighbor 4.4.4.4 update-source Loopback0neighbor 192.168.102.10 remote-as 1
address-family ipv4network 1.1.1.1 mask 255.255.255.255neighbor 192.168.102.10 activateneighbor 192.168.102.10 send-label
exit-address-familyaddress-family vpnv4
neighbor 4.4.4.4 activate
neighbor 4.4.4.4 send-community extendedexit-address-family
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address-family ipv4 vrf ABC
redistribute ospf 56exit-address-family
R2interface FastEthernet1/0ip address 192.168.101.2 255.255.255.0
ip ospf network point-to-pointspeed autoduplex autompls ip
interface FastEthernet1/1
ip address 192.168.23.2 255.255.255.0ip ospf network point-to-pointspeed 100
duplex fullmpls ip
interface Loopback0ip address 2.2.2.2 255.255.255.255
router ospf 1router-id 2.2.2.2network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0network 192.168.101.2 0.0.0.0 area 0
mpls label protocol ldpmpls ldp router-id Loopback0 force
R3interface FastEthernet1/0
ip address 192.168.23.3 255.255.255.0ip ospf network point-to-pointspeed 100
duplex full
mpls ip
interface FastEthernet1/1vrf forwarding MSSKip address 192.168.34.3 255.255.255.0
speed 100duplex fullmpls bgp forwarding
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interface Loopback0ip address 3.3.3.3 255.255.255.255
router ospf 1router-id 3.3.3.3
network 3.3.3.3 0.0.0.0 area 0network 192.168.23.3 0.0.0.0 area 0
router bgp 1bgp log-neighbor-changesno bgp default ipv4-unicastneighbor 10.10.10.10 remote-as 1neighbor 10.10.10.10 update-source Loopback0
address-family ipv4exit-address-family
address-family vpnv4neighbor 10.10.10.10 activateneighbor 10.10.10.10 send-community both
exit-address-family
address-family ipv4 vrf MSSKneighbor 192.168.34.4 remote-as 14neighbor 192.168.34.4 activateneighbor 192.168.34.4 as-override
neighbor 192.168.34.4 send-labelexit-address-family
mpls label protocol ldpmpls ldp router-id Loopback0 force
R4interface FastEthernet1/0
ip address 192.168.34.4 255.255.255.0speed 100duplex full
mpls bgp forwarding
interface FastEthernet1/1
vrf forwarding ABCip address 192.168.46.4 255.255.255.0speed 100
duplex full
interface Loopback0ip address 4.4.4.4 255.255.255.255
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vrf definition ABC
rd 200:1
address-family ipv4
route-target export 200:1route-target import 200:1exit-address-family
router ospf 56 vrf ABCrouter-id 4.4.4.4redistribute bgp 14 subnetsnetwork 192.168.46.4 0.0.0.0 area 0
router bgp 14bgp log-neighbor-changesno bgp default ipv4-unicast
neighbor 1.1.1.1 remote-as 14neighbor 1.1.1.1 update-source Loopback0neighbor 192.168.34.3 remote-as 1
address-family ipv4network 4.4.4.4 mask 255.255.255.255neighbor 192.168.34.3 activateneighbor 192.168.34.3 send-labelexit-address-family
address-family vpnv4neighbor 1.1.1.1 activateneighbor 1.1.1.1 send-community extendedexit-address-family
address-family ipv4 vrf ABCredistribute ospf 56
exit-address-family
R5
interface FastEthernet1/0
ip address 192.168.15.5 255.255.255.0duplex full
interface Loopback0ip address 5.5.5.5 255.255.255.255
router ospf 56router-id 5.5.5.5network 5.5.5.5 0.0.0.0 area 0
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network 192.168.15.5 0.0.0.0 area 0
R6interface FastEthernet1/0ip address 192.168.46.6 255.255.255.0
speed 100duplex full
interface Loopback0ip address 6.6.6.6 255.255.255.255
router ospf 56router-id 6.6.6.6network 6.6.6.6 0.0.0.0 area 0
network 192.168.46.6 0.0.0.0 area 0
RP/0/0/CPU0:XR1
hostname XR1cdpvrf MSSK
address-family ipv4 unicastimport route-target100:1
export route-target100:1
address-family ipv6 unicastimport route-target100:1
export route-target100:1
interface Loopback0ipv4 address 10.10.10.10 255.255.255.255ipv6 address 2001::10/128
interface GigabitEthernet0/0/0/0cdp
vrf MSSKipv4 address 192.168.102.10 255.255.255.0duplex full
interface GigabitEthernet0/0/0/2cdpipv4 address 192.168.101.10 255.255.255.0
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route-policy PASS_CE
passend-policy
router staticvrf MSSKaddress-family ipv4 unicast
192.168.102.1/32 GigabitEthernet0/0/0/0
router ospf 1router-id 10.10.10.10area 0interface Loopback0
interface GigabitEthernet0/0/0/2network point-to-point
router ospfv3 1router-id 10.10.10.10
area 0interface Loopback0
interface GigabitEthernet0/0/0/2network point-to-point
router bgp 1address-family ipv4 unicast
address-family vpnv4 unicast
neighbor 3.3.3.3remote-as 1update-source Loopback0
address-family vpnv4 unicast
vrf MSSK
rd 100:1
address-family ipv4 unicastallocate-label all
neighbor 192.168.102.1remote-as 14
address-family ipv4 labeled-unicastroute-policy PASS_CE inroute-policy PASS_CE outas-override
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mpls ldp
router-id 10.10.10.10interface GigabitEthernet0/0/0/2
Verifications
R1#sh ip bgp summary
BGP router identifier 1.1.1.1, local AS number 14BGP table version is 3, main routing table version 32 network entries using 288 bytes of memory2 path entries using 160 bytes of memory2/2 BGP path/bestpath attribute entries using 272 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory
2 BGP extended community entries using 80 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memory
BGP using 824 total bytes of memoryBGP activity 26/20 prefixes, 33/27 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/DownState/PfxRcd192.168.102.10 4 1 49 56 3 0 0 00:47:49 1
R1#sh ip bgpBGP table version is 3, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incompleteRPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path*> 1.1.1.1/32 0.0.0.0 0 32768 i
*> 4.4.4.4/32 192.168.102.10 0 1 1 i
R1#ping 4.4.4.4 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:Packet sent with a source address of 1.1.1.1
!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 288/465/628 ms
R1#traceroute 4.4.4.4 source lo0Type escape sequence to abort.Tracing the route to 4.4.4.4VRF info: (vrf in name/id, vrf out name/id)
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1 192.168.102.10 [MPLS: Label 16005 Exp 0] 484 msec 364 msec 520 msec2 192.168.101.2 [MPLS: Labels 17/21 Exp 0] 388 msec 360 msec 468 msec
3 192.168.34.3 [MPLS: Label 21 Exp 0] 280 msec 280 msec 308 msec4 192.168.34.4 472 msec 560 msec 564 msec
R1#sh bgp vpnv4 unicast all summaryBGP router identifier 1.1.1.1, local AS number 14BGP table version is 7, main routing table version 7
4 network entries using 624 bytes of memory4 path entries using 320 bytes of memory4/4 BGP path/bestpath attribute entries using 576 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory2 BGP extended community entries using 80 bytes of memory0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memoryBGP using 1624 total bytes of memoryBGP activity 26/20 prefixes, 33/27 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/DownState/PfxRcd
4.4.4.4 4 14 58 59 7 0 0 00:49:07 2
R1#sh bgp vpnv4 unicast allBGP table version is 7, local router ID is 1.1.1.1Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,Origin codes: i - IGP, e - EGP, ? - incompleteRPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 200:1 (default for vrf ABC)*> 5.5.5.5/32 192.168.15.5 2 32768 ?*>i 6.6.6.6/32 4.4.4.4 2 100 0 ?
*> 192.168.15.0 0.0.0.0 0 32768 ?*>i 192.168.46.0 4.4.4.4 0 100 0 ?
R1#sh bgp vpnv4 unicast all neighbors 4.4.4.4 advertised-routes
BGP table version is 7, local router ID is 1.1.1.1Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight PathRoute Distinguisher: 200:1 (default for vrf ABC)
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*> 5.5.5.5/32 192.168.15.5 2 32768 ?*> 192.168.15.0 0.0.0.0 0 32768 ?
Total number of prefixes 2
R1#sh mpls interfacesInterface IP Tunnel BGP Static OperationalFastEthernet1/0 No No Yes No Yes
R4#sh ip bgp summaryBGP router identifier 4.4.4.4, local AS number 14BGP table version is 3, main routing table version 32 network entries using 288 bytes of memory2 path entries using 160 bytes of memory
2/2 BGP path/bestpath attribute entries using 272 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory2 BGP extended community entries using 80 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memoryBGP using 824 total bytes of memory
BGP activity 25/19 prefixes, 32/26 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/DownState/PfxRcd192.168.34.3 4 1 59 60 3 0 0 00:50:31 1
R4#sh ip bgpBGP table version is 3, local router ID is 4.4.4.4Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incompleteRPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path*> 1.1.1.1/32 192.168.34.3 0 1 1 i*> 4.4.4.4/32 0.0.0.0 0 32768 i
R4#ping 1.1.1.1 source lo0Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:Packet sent with a source address of 4.4.4.4!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 360/440/508 ms
R4#traceroute 1.1.1.1 source lo0Type escape sequence to abort.
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Tracing the route to 1.1.1.1VRF info: (vrf in name/id, vrf out name/id)
1 192.168.34.3 [MPLS: Label 23 Exp 0] 408 msec 376 msec 440 msec2 192.168.23.2 [MPLS: Labels 16/16004 Exp 0] 468 msec 528 msec 520 msec3 192.168.101.10 [MPLS: Label 16004 Exp 0] 444 msec 536 msec 444 msec
4 192.168.102.1 536 msec 360 msec 384 msec
R4#sh bgp vpnv4 unicast all summary
BGP router identifier 4.4.4.4, local AS number 14BGP table version is 7, main routing table version 74 network entries using 624 bytes of memory4 path entries using 320 bytes of memory4/4 BGP path/bestpath attribute entries using 576 bytes of memory1 BGP AS-PATH entries using 24 bytes of memory
2 BGP extended community entries using 80 bytes of memory0 BGP route-map cache entries using 0 bytes of memory0 BGP filter-list cache entries using 0 bytes of memory
BGP using 1624 total bytes of memoryBGP activity 25/19 prefixes, 32/26 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/DownState/PfxRcd1.1.1.1 4 14 61 61 7 0 0 00:51:18 2
R4#sh bgp vpnv4 unicast allBGP table version is 7, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incompleteRPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight PathRoute Distinguisher: 200:1 (default for vrf ABC)
*>i 5.5.5.5/32 1.1.1.1 2 100 0 ?*> 6.6.6.6/32 192.168.46.6 2 32768 ?*>i 192.168.15.0 1.1.1.1 0 100 0 ?
*> 192.168.46.0 0.0.0.0 0 32768 ?
R4#sh bgp vpnv4 unicast all neighbors 1.1.1.1 advertised-routes
BGP table version is 7, local router ID is 4.4.4.4Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,Origin codes: i - IGP, e - EGP, ? - incompleteRPKI validation codes: V valid, I invalid, N Not found
-
8/10/2019 IOS XR Workbook
85/232
84
Network Next Hop Metric LocPrf Weight PathRoute Distinguisher: 200:1 (default for vrf ABC)
*> 6.6.6.6/32 192.168.46.6 2 32768 ?*> 192.168.46.0 0.0.0.0 0 32768 ?
Total number of prefixes 2
R4#sh mpls interfaces
Interface IP Tunnel BGP Static OperationalFastEthernet1/0 No No Yes No Yes