05RC(Routing Protocol Configuration Command)

7/27/2019 05RC(Routing Protocol Configuration Command)

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User Manual - Command Reference (Volume 2)Versatile Routing Platform Table of Contents

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Table of Contents

Chapter 1 Static Route Configuration Commands........ ......... ........ ......... ........ ......... ........ .... 1-1

1.1 ip route..................................................................................................................... 1-1

1.2 show ip route............................................................................................................ 1-2

1.3 show ip route detail ...................................................................................................1-3

1.4 show ip route radix.................................................................................................... 1-5

1.5 Show ip route static ..................................................................................................1-5

Chapter 2 RIP Configuration Commands........ ........ ......... ......... ........ ......... ........ ......... ........ . 2-1

2.1 auto-summary .......................................................................................................... 2-1

2.2 checkzero.................................................................................................................2-2

2.3 default-metric............................................................................................................ 2-2

2.4 distribute-list in ......................................................................................................... 2-3

2.5 distribute-list out ....................................................................................................... 2-4

2.6 host-route................................................................................................................. 2-5

2.7 ip rip authentication simple ........................................................................................ 2-5

2.8 ip rip authentication md5 key-string........ ......... ........ ......... ......... ........ ......... ........ ........ 2-6

2.9 ip rip authentication md5 type ........ ........ ......... ........ ......... ......... ........ ......... ........ ........ 2-7

2.10 ip rip input............................................................................................................... 2-7

2.11 ip rip metricin .......................................................................................................... 2-82.12 ip rip metricout ........................................................................................................ 2-8

2.13 ip rip output............................................................................................................. 2-9

2.14 ip rip snapshot ...................................................................................................... 2-10

2.15 ip rip split..............................................................................................................2-11

2.16 ip rip version......................................................................................................... 2-11

2.17 ip rip work.............................................................................................................2-12

2.18 neighbor ............................................................................................................... 2-13

2.19 network ................................................................................................................ 2-13

2.20 preference............................................................................................................2-14

2.21 redistribute............................................................................................................ 2-15

2.22 reset..................................................................................................................... 2-16

2.23 router rip............................................................................................................... 2-16

2.24 show ip rip............................................................................................................ 2-17

2.25 show ip rip snapshot.... ......... ........ ......... ........ ......... ........ ......... ......... ........ ......... .... 2-17

2.26 debug ip rip........................................................................................................... 2-18

Chapter 3 IGRP Configuration Commands............... ........ ......... ......... ........ ......... ........ ........ 3-1

3.1 asystem ................................................................................................................... 3-1

3.2 default-metric............................................................................................................ 3-2



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3.5 host-route................................................................................................................. 3-4

3.6 ip igrp asystem ......................................................................................................... 3-5

3.7 ip igrp input............................................................................................................... 3-6

3.8 ip igrp output............................................................................................................. 3-6

3.9 ip igrp snapshot ........................................................................................................ 3-7

3.10 ip igrp split.............................................................................................................. 3-8

3.11 ip igrp work............................................................................................................. 3-8

3.12 metric holddown...................................................................................................... 3-9

3.13 metric maximum-hops ........................................................................................... 3-10

3.14 metric weights....................................................................................................... 3-10

3.15 neighbor ............................................................................................................... 3-11

3.16 network ................................................................................................................ 3-12

3.17 preference............................................................................................................3-13

3.18 redistribute............................................................................................................ 3-13

3.19 reset..................................................................................................................... 3-14

3.20 router igrp............................................................................................................ 3-14

3.21 show ip igrp..........................................................................................................3-15

3.22 show ip igrp snapshot.. ......... ........ ......... ........ ......... ........ ......... ......... ........ ......... .... 3-15

3.23 debug ip igrp......................................................................................................... 3-16

Chapter 4 EIGRP Configuration Commands......... ........ ......... ........ ......... ........ ......... ........ .... 4-1

4.1 auto-summary .......................................................................................................... 4-1

4.2 default-metric............................................................................................................ 4-24.3 distribute-list in ........................................................................................................ 4-3


4.5 ip authentication key-id eigrp ......... ........ ......... ........ ......... ......... ........ ......... ........ ........ 4-4

4.6 ip authentication key-string eigrp..... ......... ........ ......... ........ ......... ......... ........ ......... ...... 4-5

4.7 ip authentication mode eigrp........... ......... ........ ......... ........ ......... ......... ........ ......... ...... 4-6

4.8 ip bandwidth-percent eigrp.............. ......... ........ ......... ........ ......... ......... ........ ......... ...... 4-7

4.9 ip hello-interval eigrp ................................................................................................. 4-7

4.10 ip hold-time eigrp ....................................................................................................4-8

4.11 ip split-horizon eigrp................................................................................................ 4-9

4.12 ip summary-address eigrp ..................................................................................... 4-10

4.13 metric weights....................................................................................................... 4-11

4.14 network ................................................................................................................ 4-11

4.15 offset-list............................................................................................................... 4-12

4.16 distance................................................................................................................ 4-13

4.17 passive-interface................................................................................................... 4-14

4.18 redistribute............................................................................................................ 4-14

4.19 router eigrp........................................................................................................... 4-15

4.20 set metric ............................................................................................................. 4-16

4.21 show ip eigrp interfaces ......... ......... ........ ......... ........ ......... ........ ......... ........ ......... ... 4-17


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4.22 show ip eigrp neighbors.. ........ ......... ......... ........ ......... ........ ......... ........ ......... ........ .. 4-18

4.23 show ip eigrp topology........ ......... ........ ......... ........ ......... ........ ......... ........ ......... ... 4-18

4.24 show ip eigrp traffic ............................................................................................... 4-19

4.25 debug eigrp .......................................................................................................... 4-20

4.26 debug ip eigrp....................................................................................................... 4-21

Chapter 5 OSPF Configuration Commands.............. ........ ......... ......... ........ ......... ........ ........ 5-1

5.1 default redistribute cost............................................................................................. 5-1

5.2 default redistribute interval... ........ ......... ........ ......... ......... ........ ......... ........ ......... ........ . 5-2

5.3 default redistribute limit ............................................................................................. 5-3

5.4 default redistribute tag... ......... ........ ......... ........ ......... ........ ......... ......... ........ ......... ...... 5-4

5.5 default redistribute type ............................................................................................. 5-4


5.7 ip ospf authentication simple........ ......... ........ ......... ......... ........ ......... ........ ......... ........ . 5-6

5.8 ip ospf authentication md5.......... ........ ......... ......... ........ ......... ........ ......... ........ ......... .. 5-7

5.9 ip ospf cost...............................................................................................................5-7

5.10 ip ospf dead-interval ................................................................................................ 5-8

5.11 ip ospf enable area......... ........ ......... ......... ........ ......... ........ ......... ........ ......... ........ .... 5-8

5.12 ip ospf hello-interval ................................................................................................ 5-9

5.13 ip ospf neighbor .................................................................................................... 5-10

5.14 ip ospf network-type.............................................................................................. 5-11

5.15 ip ospf poll-interval ................................................................................................5-12

5.16 ip ospf priority ....................................................................................................... 5-12

5.17 ip ospf retransmit ..................................................................................................5-145.18 ip ospf transmit-delay ............................................................................................ 5-14

5.19 preference............................................................................................................5-15

5.20 range area............................................................................................................ 5-16

5.21 redistribute............................................................................................................ 5-17

5.22 router id................................................................................................................ 5-18

5.23 router ospf enable .................................................................................................5-19

5.24 stub cost .............................................................................................................. 5-20

5.25 virtuallink .............................................................................................................. 5-20

5.26 show ip ospf......................................................................................................... 5-21

5.27 show ip ospf ase................................................................................................... 5-22

5.28 show ip ospf cumulative............ ........ ......... ......... ........ ......... ........ ......... ........ ......... 5-23

5.29 show ip ospf database........................................................................................... 5-23

5.30 show ip ospf error........ ......... ........ ......... ........ ......... ........ ......... ......... ........ ......... .... 5-24

5.31 show ip ospf interface......... ......... ........ ......... ........ ......... ......... ........ ......... ........ ...... 5-25

5.32 show ip ospf lsa.................................................................................................... 5-25

5.33 show ip ospf neighbor........ ........ ......... ........ ......... ......... ........ ......... ........ ......... ....... 5-26

5.34 show ip ospf nexthop......... ........ ......... ........ ......... ......... ........ ......... ........ ......... ....... 5-27

5.35 show ip ospf routing .............................................................................................. 5-27

5.36 show ip ospf virtual-links......... ......... ......... ........ ......... ........ ......... ........ ......... ........ .. 5-28


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5.37 debug ip ospf ........................................................................................................ 5-28

Chapter 6 BGP Configuration Commands.............. ......... ......... ........ ......... ........ ......... ........ . 6-1

6.1 aggregate-address.................................................................................................... 6-2

6.2 bgp always-compare-med........... ........ ......... ......... ........ ......... ........ ......... ........ ......... .. 6-36.3 bgp client-to-client reflection ........ ......... ........ ......... ......... ........ ......... ........ ......... ........ . 6-4

6.4 bgp cluster-id............................................................................................................ 6-5

6.5 bgp confederation cisco-compatible ........................................................................... 6-6

6.6 bgp confederation identifier......... ........ ......... ......... ........ ......... ........ ......... ........ ......... .. 6-6

6.7 bgp confederation peers ............................................................................................ 6-7

6.8 bgp dampening......................................................................................................... 6-8

6.9 bgp default local-preference........ ........ ......... ......... ........ ......... ........ ......... ........ ......... .. 6-9

6.10 clear ip bgp........................................................................................................... 6-10

6.11 clear ip bgp dampening ......................................................................................... 6-10

6.12 clear ip bgp flap-statistics...................................................................................... 6-11

6.13 clear ip bgp peer-group........... ......... ......... ........ ......... ........ ......... ........ ......... ........ .. 6-11

6.14 default-information originate......... ........ ......... ........ ......... ......... ........ ......... ........ ...... 6-12

6.15 default-metric........................................................................................................ 6-12

6.16 distribute-list in........... ........ ......... ........ ......... ........ ......... ......... ........ ......... ........ ...... 6-13

6.17 distribute-list out.... ......... ........ ......... ......... ........ ......... ........ ......... ........ ......... ........ .. 6-14

6.18 ip as-path access-list............................................................................................. 6-15

6.19 ip community-list................................................................................................... 6-16

6.20 match as-path.......................................................................................................6-17

6.21 match community..................................................................................................6-176.22 match interface.....................................................................................................6-18

6.23 match ip address ..................................................................................................6-19

6.24 match ip next-hop........... ........ ......... ......... ........ ......... ........ ......... ........ ......... ........ .. 6-20

6.25 match metric......................................................................................................... 6-20

6.26 neighbor advertisement-interval .............................................................................6-21

6.27 neighbor default-originate...................................................................................... 6-21

6.28 neighbor distribute-list ........................................................................................... 6-22

6.29 neighbor ebgp-multihop......................................................................................... 6-23

6.30 neighbor filter-list ..................................................................................................6-23

6.31 neighbor next-hop-self........................................................................................... 6-24

6.32 neighbor peer-group.............................................................................................. 6-24

6.33 neighbor remote-as ............................................................................................... 6-25

6.34 neighbor route-map...............................................................................................6-26

6.35 neighbor route-reflector-client ................................................................................ 6-26

6.36 neighbor send-community............ ........ ......... ........ ......... ......... ........ ......... ........ ...... 6-27

6.37 neighbor timers..................................................................................................... 6-28

6.38 neighbor version ...................................................................................................6-29

6.39 network ................................................................................................................ 6-29

6.40 redistribute............................................................................................................ 6-30


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6.41 route-map............................................................................................................. 6-30

6.42 router bgp............................................................................................................. 6-31

6.43 set as-path............................................................................................................ 6-32

6.44 set community ...................................................................................................... 6-33

6.45 set ip next-hop...................................................................................................... 6-34

6.46 set local-preference............................................................................................... 6-34

6.47 set metric ............................................................................................................. 6-35

6.48 set origin............................................................................................................... 6-35

6.49 synchronization..................................................................................................... 6-36

6.50 table map ............................................................................................................. 6-37

6.51 timers bgp ............................................................................................................ 6-37

6.52 show ip bgp as-path.............................................................................................. 6-38

6.53 show ip bgp.......................................................................................................... 6-38

6.54 show ip bgp cidr-only............ ........ ......... ........ ......... ........ ......... ......... ........ ......... .... 6-39

6.55 show ip bgp community......................................................................................... 6-39

6.56 show ip bgp community-list........ ......... ........ ......... ......... ........ ......... ........ ......... ....... 6-40

6.57 show ip bgp dampened-paths ................................................................................ 6-40

6.58 show ip bgp filter-list............... ......... ......... ........ ......... ........ ......... ........ ......... ........ .. 6-41

6.59 show ip bgp flap-statistics............. ......... ........ ......... ........ ......... ......... ........ ......... .... 6-42

6.60 show ip bgp inconsistent-as ......... ........ ......... ........ ......... ......... ........ ......... ........ ...... 6-42

6.61 show ip bgp neighbors...........................................................................................6-43

6.62 show ip bgp network.... ......... ........ ......... ........ ......... ........ ......... ......... ........ ......... .... 6-44

6.63 show ip bgp paths .................................................................................................6-44

6.64 show ip bgp peer-group......................................................................................... 6-44

6.65 show ip bgp regexp............................................................................................... 6-45

6.66 show ip bgp summary... ......... ......... ........ ......... ........ ......... ........ ......... ........ ......... ... 6-45

6.67 show route-map.................................................................................................... 6-46

6.68 debug ip bgp......................................................................................................... 6-46

Chapter 7 IP Routing Policy Configuration Commands......... ........ ......... ........ ......... ........ .... 7-1



7.3 ip prefix-list...............................................................................................................7-3

7.4 match as-path........................................................................................................... 7-4

7.5 match community-list ................................................................................................ 7-5

7.6 match interface......................................................................................................... 7-6

7.7 match ip address ...................................................................................................... 7-7

7.8 match ip next-hop .....................................................................................................7-7

7.9 match metric............................................................................................................. 7-8

7.10 match route-type .....................................................................................................7-8

7.11 match tag ............................................................................................................... 7-9

7.12 redistribute............................................................................................................ 7-10

7.13 route-map............................................................................................................. 7-12


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7.14 set as-path............................................................................................................ 7-13

7.15 set community ...................................................................................................... 7-14

7.16 set ip next-hop...................................................................................................... 7-15

7.17 set local-preference............................................................................................... 7-15

7.18 set metric ............................................................................................................. 7-16

7.19 set origin............................................................................................................... 7-16

7.20 set tag.................................................................................................................. 7-17

7.21 show ip access-list................................................................................................ 7-18

7.22 show ip prefix-list ..................................................................................................7-18

7.23 show route-map.................................................................................................... 7-19

Chapter 8 IP Policy Route Configuration Commands................ ......... ........ ......... ........ ........ 8-1

8.1 ip local policy route-map................ ........ ......... ........ ......... ......... ........ ......... ........ ........ 8-1

8.2 ip policy route-map........ ......... ........ ......... ........ ......... ........ ......... ......... ........ ......... ...... 8-2

8.3 match ip address ...................................................................................................... 8-2

8.4 match length.............................................................................................................8-3

8.5 route-map................................................................................................................. 8-4

8.6 set ip precedence......... ........ ......... ........ ......... ........ ......... ......... ........ ......... ........ ........ 8-5

8.7 set interface.............................................................................................................. 8-6

8.8 set ip next-hop.......................................................................................................... 8-6

8.9 set default interface.......... ......... ........ ......... ......... ........ ......... ........ ......... ........ ......... .. 8-7

8.10 set ip default next-hop............................................................................................. 8-8

8.11 debug ip policy-routing ............................................................................................ 8-8


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User Manual - Command Reference (Volume 2)Versatile Routing Platform

Chapter 1Static Route Configuration Commands

1-1

Chapter 1 Static Route Configuration Commands

Static route configuration commands include:

l ip routel show ip routel show ip route detaill show ip route radix

1.1 ip route

1) To assign a static route, use the ip route command. To remove the entry, use theno form of this command.

ip route ip-address {mask | mask-length } { interface-name | gateway-address }[ preferencevalue ] [ reject | blackhole ]

no ip route ip-address {mask| mask-length } { interface-name | gateway-address}[ preferencevalue ]

2) To assign a default route use the ip route command. To remove the entry, use theno form of this command.

ip route 0.0.0.0 { 0.0.0.0 | 0 } { interface-type interface-name| nexthop-address}[ preference value] [ reject | blackhole ]

no ip route 0.0.0.0 { 0.0.0.0 | 0 } [ interface-type interface-name| nexthop-address ][ preference value]

Syntax Description

ip-address and mask IP address of the destination and mask, in dotted decimal. The 1s

in the 32 bits in the mask are required to be continuous, so the mask in dotted decimalcan be substituted formask-length. The mask length is equivalent to the number of thecontinuous 1s in the mask

interface-name name of the specified transmitting interface for this route; gateway-address IP address of the next hop for this route (dotted decimal).

preference-value preference value for the router, ranging 0 to255.

reject indicates a route that is unreachable route.

blackhole indicates a route that is a backhole route.

Default

By default, the system can obtain the route to the net connected with the router. If nopreference value is specified while configuring the static route, it is 60 by default. If noreject and blackhole are set, the route is reachable.

Command Mode

Global configuration mode


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Usage Guideline

When the destination IP address and mask are both 0.0.0.0, a default route isconfigured. That is, when routing table search fails, packets are forwarded along this

default route.

The route management policy can be flexibly used for setting different preferences.When multiple routes bound for the same destination are configured, and if the samepreference is specified, then load sharing can be implemented. If different preferencesare set, then route backup can be achieved.

While configuring a static route, you can specify a TX interface, or a next-hop address.Which one is to be used depends on the actual situation. Just specifying the TXinterface as for the interface supporting solution of the network address to the link layeror point-to-point interface. As for NBMA interfaces like the interfaces and dialupinterface encapsulated with X.25 or frame relay, they support the point-to-point link, soin addition to configuring an IP route, you need to set up a secondary route at the linklayer, that is, a map from the IP address to the link-layer address (like dialer map ip,x.25 map ip or frame-relay map ip). In this situation, you can not specify the TXinterface by configuring a static route, and instead need to configure a next-hop IPaddress.

Example

! Assign the next hop of the default route to 129.102.0.2.

Quidway(config)# ip route 0.0.0.0 0.0.0.0 129.102.0.2

Related Command

show ip route, show ip route detail

1.2 show ip route

To display the summary of the routing table, use the show ip route command.

show ip route [ ip-address ]

Command Mode

Privileged USER MODE

Usage Guideline

The output of this command shows the routing table in tabulation. Each row representsa route, and includes:

destination address/mask length

Protocol

Preference

Metric

Next hop

Output interface


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This command can also be used when the routing table is too large and the user onlywishes to show the detail of several specified routes. According to the informationoutput through this command, the user can make sure if the specified routes exist or ifits status is correct.

If the specified routes are those in a natural hop like 10.0.0.0, then the execution of thiscommand will show the detail of all the routes. Otherwise only routing informationcorresponding to the specified addresses is shown.

Example

Quidway#show ip route

Routing Tables:Destination/Mask Proto Pref Metric Nexthop Interface127.0.0.0/8 Static 0 0 127.0.0.1 loopback127.0.0.1/32 Direct 0 0 127.0.0.1 loopback138.102.128.0/17 Direct 0 0 138.102.129.7 Ethernet 0202.38.165.0/24 ospf 0 0 202.38.165.1 Serial 1

The above information shows the destination ip address/the lengths of mask, routingprotocol type (Static indicating a static route, and Direct indicating a reachable route),priority of the route, metric, next hop address, and finally the output interface.

Quidway#show ip route 127.0.0.1

**Destination: 127.0.0.1 Mask: 255.255.255.255Protocol: *Direct Preference: 0NextHop: 127.0.0.1 Interface: 127.0.0.1(LO0)State: Age: 114:03:05 Metric: 0/0

This command shows all the routing information to a specified destination IP address.The output information helps the user make sure if the specified routes exist or if itsspecific status is correct.

If routes in natural hop are specified like 10.0.0.0, then the detail about all the routes inthis hop will be shown; otherwise only the routing information corresponding to thespecified addresses is shown.

Related Command

ip route, show ip route detail, show ip route A.B.C.D, show ip route static

1.3 show ip route detail

To display the detail of the routing table, use the show ip route detail command.

show ip route detail

Command Mode

Privileged user mode

Usage Guideline

The information output through this command helps the user with fault diagnosis in therouter.


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Example

Quidway#show ip route detail

Route state description

NoAdv: do not advertiset Int: AS Interior routeExt: AS External route Del: route to be deletedActive: current route Retain: route retains in the routing tableRej: rejecting route Black: black hole routeRouting Tables:Generate Default: no+ = Active Route, - = Last Active, * = BothDestinations: 4 Routes: 4Holddown: 0 Delete: 9 Hidden: 0**Destination: 127.0.0.0 Mask: 255.0.0.0Protocol: *Static Preference: 0NextHop: 127.0.0.1 Interface: 127.0.0.1(LO0)State: Age: 19:31:06 Metric: 0/0**Destination: 127.0.0.1 Mask: 255.255.255.255

Protocol: *Direct Preference: 0NextHop: 127.0.0.1 Interface: 127.0.0.1(LO0)State: Age: 114:03:05 Metric: 0/0

The above information first shows the route state description sign, then the statistics ofthe whole routing table, finally the detail of each route. Their meanings are shown in thefollowing table.

Table RC-1-1 Meanings of parameters in show ip r oute detail command

Type Sign Meaning

NoAdvNOADVISE route is not broadcast when each routing protocol is broadcast routesaccording to Route Map.

Int The route is identified through IGP

Ext The route is identified through EGP

Del Route deleted

Active Actually valid route

RetainUsually, when a certain routing protocol is normally exiting, all the routes identified byit will be deleted. However, those routes labeled with Retain will not be deleted.

Rej

These routes do not forward packets as normal routes do. Packets selecting routeswith the label of REJECT will be dropped, and such routes will send ICMP

unreachable message to the source of the packet. REJECT routes are usually usedfor network tests or experiments.

Route statedescription

BlackBLACKHOLE route is similar to REJECT route. The difference is that it does notsend the ICMP unreachable message to the source end of the packet.

Holddown

Holddown route means: a route broadcast policy adopted by some distance vector

routing protocols (like RIP) to avoid the broadcast of error routes and improve thefast and accurate broadcast of the route unreachable message. Usually itbroadcasts a certain route regularly during an interval, no matter what change hasoccurred to the route to the same destination currently retrieved. For detail, please

consul the routing protocols. The routing table statistics show the number of routesheld down currently.

Delete Number of routes deleted.

Routing

tablestatistics

HiddenSome routes can not be used for a certain reason (like interface Down), but we donot want them to be deleted. Therefore we hide them so that they can be recovered.

The routing table statistics show the number of currently hidden routes.

Related Command

ip route, show ip route, show ip route static


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1.4 show ip route radix

To display the dendritic routing table, use the show ip route radix command.

show ip route radix

Command Mode


Usage Guideline

The information will display the dendritic routing table.

Example

Quidway# show ip route radixRadix tree for INET (2) inodes 20 routes 12:

+-24+--{202.102.10.0+--4+| +-24+--{196.100.10.0| +-32+--{196.100.10.1

+--1+| +--8+--{172.0.0.0| +-32+--{172.110.10.1| +-20+| | +-32+--{172.110.1.10| +--9+| +-32+--{172.10.0.87

+--0+

| | +--8+--{127.0.0.0| | | +-32+--{127.0.0.1| +--1+| | +-16+--{36.7.0.0| +--2+| | +-32+--{10.110.255.1| +--9+| +-32+--{10.11.0.211

Related Command

ip route, show ip route, show ip route detail

1.5 Show ip route staticDisplay the static routing table.

show ip route static

Command Mode


Usage Guideline

Depending on this command s output, users can make sure whether the configuration

of the static route is correct


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Example

Quidway# show ip route static

Static routes for family INET: (* indicates gateway(s) in use)

1.2.3.0/24 pref 60 intf Ethernet 0127.0.0.8 pref 0 intf127.0.0.1

This command s output helps users to make sure whether the configuration of the static

route is correct. Those information above shows destination ip address/length of mask,priority of the route, , and the address of the output interface or nexthop.

Related Command

ip route, show ip route, show ip route ip-address, show ip route detail


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Chapter 2RIP Configuration Commands

2-1

Chapter 2 RIP Configuration Commands

RIP configuration commands include:

l auto-summaryl checkzerol default-metricl distribute-list inl distribute-list outl host-routel ip rip authentication md5 key-stringl ip rip authentication md5 typel ip rip authentication simplel ip rip input

l ip rip metricinl ip rip metricoutl ip rip outputl ip rip snapshotl ip rip splitl ip rip versionl ip rip workl neighborl networkl preferencel redistributel resetl router rip

l show ip ripl show ip rip snapshotl debug ip rip packet

2.1 auto-summary

To restore the default behavior of automatic summarization of subnet routes into

network-level routes, use the auto-summary command. To disable this function usethe no form of this command.

auto-summary

no auto-summary

Default

Enabled

Command Mode

RIP configuration mode

Usage Guideline

Route summarization reduces the amount of routing information in the routing tables.

RIP Version 1 always uses automatic summarization. If you are using RIP Version 2,


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you can turn off automatic summarization by specifying the no auto-summarycommand. Disable automatic summarization if you must perform routing betweendisconnected subnets. When automatic summarization is off, subnets are advertised.

Example

! Set the RIP Version 2 on Serial 0 and disable the route summary function.

Quidway(config-if-Serial0)# ip rip version 2

Quidway(config)# router rip

Quidway(config)# no auto-summary

Related Command

ip rip version

2.2 checkzero

To check zero-field in a RIP-1 packet , use the checkzero command. To disable thisfunction, use the no form of this command.

checkzero

no checkzero

Default

Enabled

Command Mode


Usage Guideline

According to RFC1058, some fields in the RIP-1 packet must be zeroes, and thesefields are called zero fields. checkzero orno checkzero can be used to start or cancelthe checkzero operation on the RIP-1 packet. No processing will be conducted on thereceived RIP-1 packet whose zero-field is not a zero.

Since a RIP-2 packet does not contain any zero fields, this command has no effect on

it.

Example

! Disable check the zero-field in the RIP-1 packet.

Quidway(config-router-rip)#no checkzero

2.3 default-metric

To set default metric values for RIP, use the default-metric command. To return to thedefault state, use the no form of this command.


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default-metric metric

no default-metric

Parameter Description

value route metric to be set, ranging 1 to 16.

Default

The default metric values for RIP is 16

Command Mode


Usage Guideline

The default-metric command is used in conjunction with the redistribute routerconfiguration command to cause the current routing protocol to use the same metricvalue for all redistributed routes. A default metric helps solve the problem ofredistributing routes with incompatible metrics. Whenever metrics do not convert, usinga default metric provides a reasonable substitute and enables the redistribution toproceed.

Example

! Set the default metric for RIP to 3 when a route is redistributed from the other routingprotocols.

Quidway (config-router-rip)#default-metric 3

Related Command

redistribute

2.4 distribute-list in

1) To filter networks received in updates from specified gateway, use thedistribute-list gateway in command. To change or cancel the filter, use the noform of this command.

distribute-list gatewayprefix-list-name inno distribute-list gatewayprefix-list-name in

2) To filter networks received in updates, which match the specified access-list andprefix-list, use the distribute-list prefix in command. To change or cancel thefilter, use the no form of this command.

distribute-list {access-list-number| prefix-listprefix-list-name} in

no distribute-list {access-list-number| prefix-listprefix-list-name} in

Syntax Description

access-list-number IP access list number which defines which networks are to be

received and which are to be suppressed in routing updates, ranging 1 to 199.


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prefix-list-name prefix list name for filtering the destination address of routinginformation.

in applies the access list to incoming routing updates.

Default

Disabled

Command Mode


Usage Guideline

You can define the range of the routes received by RIP by specifying the access list andprefix list.

Example

! set route redistributed through access-list 3.

Quidway(config-router-rip)# distribute-list 3 in

Related Command

access-list

2.5 distribute-list out

To suppress networks from being advertised in updates, use the distribute-list outcommand. To cancel this function, use the no form of this command.

distribute-list {access-list-number | prefix-list prefix-list-name } out [ protocol]

nodistribute-list{access-list-number | prefix-list prefix-list-name } out[protocol]

Syntax Description

access-list-number IP access list number which defines which networks are to bereceived and which are to be suppressed in routing updates, ranging 1 to 199.


out applies the access list to outgoing routing updates.

protocol name of a protocol used to distribute route information routing process,including direct, static, rip, igrp, eigrp, ospf, ospf-ase, bgp.

Default

Disabled


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Command Mode


Usage Guideline

You can define the range of routes advertised by RIP by specifying the access list andprefix list.

Example

Quidway(config-router-rip)# distribute-list distribute-list 3 in

Related Command

access-list

2.6 host-route

To enable receiving the host route, use the host-route command. To disable thisfunction (reject the host route, use the no form of this command.

host-route

nohost-route

Default

Enabled

Command Mode


Usage Guideline

In some special circumstances, RIP will receive lots of the host routes from the same

hop. These routes may be not helpful in routing, but occupy a lot of resources. If userwants to reject the host route, use the no host-route command.

Example

! Rejecting the host route.

Quidway(config-router-rip)# no host-route

2.7 ip rip authentication simple

To enable authentication for RIP Version 2 packets and to specify the password that

can be used on an interface, use the ip rip authentication simple command. Toprevent authentication, use the no form of this command.

ip rip authentication simplepassword

no ip rip authentication


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Syntax Description

passwordRIP-2 clear text, ranging 1 to16.

Default

Interface do not authenticate packets.

Command Mode

Interface configuration mode

Usage Guideline

RIP Version 1 does not support authentication. There are two main RIP authenticationpackets: simple authentication and M5 authentication.

Example

! Set simple authentication at Serial0, and the password is aaa.


Quidway(config-if-Serial0)# ip rip authentication simple aaa

2.8 ip rip authentication md5 key-string

To enable authentication for RIP Version 2 packets and to specify the key string of MD5algorithm that can be used on an interface, use the ip rip authenticationmd5 key-string command. To prevent authentication, use the no form of this command.

ip rip authentication md5 key-stringstring


Syntax Description

stringkey string of MD5 algorithm specified on an interface.

Default

Interface do not authenticate packets

Command Mode


Usage Guideline

RIP-1 do not support authentication packets. RIP-2 mainly consists of simpleauthentication and MD5 authentication

Example

! Set MD5 authentication at Serial0, and the key string is aaa


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Quidway(config-if-Serial0)# ip rip authentication md5 key-string aaa

Related Command

ip rip version

2.9 ip rip authentication md5 type

To specify the type of authentication used in Routing Information Protocol (RIP) Version

2 packets, use the ip rip authentication mode command. To restore clear textauthentication, use the no form of this command.

ip rip authentication md5 type [ cisco | usual ]


Syntax Description

cisco MD5 authentication packet is required to use the cisco format.

usual MD5 authentication packet is required to use the usual format.

Command Mode

Cisco s packet format

Example

! Set MD5 authentication at Serial0, and the packet type is cisco.


Quidway(config-if-Serial0)# ip rip authentication md5 type cisco

Related Command

ip rip version

2.10 ip rip input

To set whether the interface receives RIP packets

ip rip input

no ip rip input

Default

Any RIP packet at the interface can be received.

Command Mode



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2-9

ip rip metricout value

no ip rip metricout

Syntax Description

value metric added when a packet is sent, ranging 0 to 16.

Default

The default value added when a RIP packet is sent is 1

Command Mode


Example

! Set the metric value added to 5 when a RIP packet is sent at Serial 0.

Quidway(config-if-Serial0)# ip rip metricout 5

Related Command

ip rip metricin

2.13 ip rip output

To allow sending the RIP packets at the interface, use the ip rip output command. To

disable the function (reject sending the RIP packets at the interface), use the no form ofthis command.

ip rip output

no ip rip output

Default

Any RIP packet at the interface is to be sent

Command Mode


Usage Guideline

This command is used in collaboration with ip rip input and ip rip work. ip rip work isfunctionally equivalent to ip rip input & ip rip output, which controls the receiving andsending of RIP packets at the interface. Functionally, the former command is equal tothe sum of the latter two commands.

Example

! Reject any RIP packet output at Serial 0.

Quidway(config-if-Serial0)# no ip rip output


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Related Command

ip rip input, ip rip work

2.14 ip rip snapshot

To enable the RIP snapshot function at the interface, use the ip rip snapshotcommand. To disable this function, use the no form of this command.

ip rip snapshot { client | server} active_interval[ quiet_interval]

noip rip snapshot {client | server}

Syntax Description

active_interval active time interval which is the time length for switching routing

information between the Client and Server, ranging 5 to 1000 minutes.

quiet_intervalquiet time interval that is the time interval between the active intervals.During this interval, all the routes at this interface will be locked up just as in the case ofthe static route, until the next active interval. It ranges from 8 to 100000 minutes. Thequiet interval should be 3 minutes greater than the active interval.

Default

The function is disabled

Command Mode


Usage Guideline

The active intervals at the Server and Client should be equal.

Example

! Configure two routers directly connected through serial port. Set the active intervaland the quite interval on the client (router A) to be 5 minutes and 1000 minutes. Set theactive interval on the server (router B) to be 5 minutes.

1) Configuring router A:

Quidway(config)# interface serial 0

Quidway(config-if-Serial0)# ip rip snapshot client 5 1000

2) Configuring router B:


Quidway(config-if-Serial0)# ip rip snapshot server 5

Related Command

show ip rip snapshot


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2.15 ip rip split

To enable the split horizon mechanism, use the ip rip split command. To disable the

split horizon mechanism, use the no form of this command.

ip rip split

no ip rip split

Default

The split horizon mechanism is disabled

Command Mode


Usage Guideline

Normally, split horizon is necessary to avoid the appearance of bad routes. Only insome special circumstances it is necessary to cancel horizontal split to ensure thecorrect protocol execution. Before you cancel it, you need to make sure if it isnecessary.

Example

! Disable split horizon mechanism on Serial 0.

Quidway(config-if-Serial0)# no ip rip split

2.16 ip rip version

To specify a RIP version received/sent on an interface, use the ip rip version

command. To restore the default version run on an interface, use the no form of thiscommand.

ip rip version1|2 [ bcast | mcast]

no ip rip version

Syntax Description

1 RIP Version 1.

2 RIP Version 2.

bcast supports RIP-2 broadcast packet.

mcastsupports RIP-2 multicast packet.

Default

RIP-1 is the default version used on the interface. When RIP-2 is used on the interface,multicast is the default mode.


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Command Mode


Usage Guideline

RIP-2 has 2 transmission modes: broadcast and multicast. Multicast is the defaultmode. The multicast address in RIP-2 is 224.0.0.9. One of the advantages of multicastmode is that the hosts that do not run RIP in this network will not receive the broadcastpackets. Additionally, hosts running RIP-1 will be prevented from receiving andprocessing the RIP-2 routes with subnet masks.

When the interface is specified to use RIP-1, only RIP-1 and RIP-2 broadcast packetswill be received. In this case, RIP-2 will be rejected. When the interface is specified touse RIP-2 broadcast, only RIP-2 broadcast packets will be received. In this case, RIP-2multicast packets will be rejected. Whe the interface is specified to use RIP-2 multicast,only RIP-2 multicast packets will be received. In this case, RIP-1 and RIP-2 broadcast

packets will be rejected.

Example

! Set Serial 0 supports RIP-2 broadcast packets.

Quidway(config-if-Serial0)# ip rip version 2 bcast

2.17 ip rip work

To enable the RIP work at the interface, use the ip rip work command. To disable it,use the no form of this command.

ip rip work

no ip rip work

Default

The RIP is enabled work at the interface

Command Mode


Usage Guideline

ip rip work works together with ip rip input and ip rip output commands.

Example

! Enable RIP work at Serial 0.

Quidway(config-if-Serial0)# no ip rip work

Related Command

network, ip rip input, ip rip output


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2.18 neighbor

To define a neighboring router with which to exchange routing information, use the

neighbor command. To remove the entry, use the no form of this command.

neighborip-address

no neighborip-address

Syntax Description

ip-address IP address specified to exchange information with.

Default

No neighboring routers are defined

Command Mode


Usage Guideline

Normally this command is not recommended, because the neighbor does not need to

receive two identical packets at one time. Note that when sending packets, ip rip work,ip rip out, ip rip in and network also limit the neighbor command.

Multiple neighborcommands can be used to specify additional neighbors or peers.

Example

! Specified IP address 202.38.165.1 as a neighbor.

Quidway(config-router-rip)# neighbor 202.38.165.1

2.19 network

To specify a list of networks for the RIP routing process, use the network routerconfiguration command. To remove an entry, use the no form of this command.

network { network-number | all }

nonetwork { network-number | all }

Syntax Description

network-number IP address of the network of directly connected networks.

all indicates RIP is enabled at all the interfaces of the router.

Default

No networks are specified


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Command Mode


Usage Guideline

After the RIP routing process is started, the RIP routing process must be disabled at all

the interfaces by default. The network number specified must not contain any subnetinformation. You can specify multiple network commands. RIP routing updates will besent and received only through interfaces on this network. RIP sends updates to theinterfaces in the specified networks. Also, if an interface's network is not specified, it willnot be advertised in any RIP update.

no network is similar to no ip rip work functionally, but they are not totally the same.They are the same in that the interface of either command no longer receives andtransmits RIP routes. They are different in that, with the no ip rip work command, theother interface is still forwarding the route using the interface of this command; with the

no network command, the other interface no longer forwards the route using theinterface of this command, looking as if one interface were missing.

Example

! Enable RIP at the interface with a network address of 129.102.0.0.

Quidway(config-router-igrp)# network 129.102.0.0

Related Command

ip rip work

2.20 preference

To define routing preference for RIP based on route type, use the preferencecommand. To restore the default value, use the no form of this command.

preferencevalue

no preference

Syntax Description

value preference value specified for RIP, ranging 1 to 255.

Default

The routing preference for RIP is 100

Command Mode


Usage Guideline

Each routing protocol has its own routing preference, and the specific route mapdecides its default value. The routing preference will finally decide which routing


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algorithm is used to select the best route in the IP routing table. You can manuallyadjust the RIP preference with this command.

Example

! Set the RIP routing preference to be 20.

Quidway(conifg-router-rip)# preference 20

2.21 redistribute

To redistribute routes from one routing domain into another routing domain, use theredistribute command. To disable redistribution, use the no form of this command.

redistributeprotocol[ metricmetric][ route-mapmap-name]

no redistribute protocol

Syntax Description

protocolsource protocol from which routes are being redistributed. Now the routes thatcan be redistributed by rip include direct, static, igrp, eigrp, ospf, ospf-ase and bgp.

For more detail of redistributed routes, please consult the redistribute command inConfigure Routing Policy.

Default

Route redistribution is disabled

Command Mode


Usage Guideline

redistribute is used to redistribute routes of other protocols through a certain metric

value and route-map. RIP regards the redistributed routes as its own and transmitsthem by the same metric. This command greatly improves the routing capability of RIP,therefore enhancing the performance of RIP.

If no metric metricis specified, then it is redistributed according to the default-metric.

Example

! Redistribute static routes to RIP packet with metric 4.

Quidway(config-router-rip)# redistribute static metric 4

! Set the default metric to be 3, redistribute the OSPF routing with a default metric.

Quidway(config-router-rip)# default-metric 3

Quidway(config-router-rip)# redistribute ospf


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Related Command

default-metric

2.22 reset

To reset all the system configuration parameters for RIP, use the reset command.

reset

Command Mode


Usage Guideline

The command can be used to restore the default RIP configuration.

Example

! Reset the RIP system configuration.

Quidway(config-router-rip)# reset

2.23 router rip

To configure the RIP routing process and enter RIP configuration mode, use the routerrip command. To turn off the RIP routing process, use the no form of this command.

router rip

norouter rip

Default

No RIP routing process is defined

Command Mode

Global configuration mode

Usage Guideline

You need to start RIP routing process first. Only if entering the RIP configuration modeyou can you configure the parameters relevant with RIP.

Example

! Start RIP routing process and enter the RIP configuration mode.

Quidway(config)# router rip

Quidway(config-router-rip)#


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2.24 show ip rip

To display current running status and configuration information of RIP.

show ip rip

Command Mode


Usage Guideline

According to the information output through this command, you can confirm if thecurrent configuration is correct and perform RIP fault diagnosis.

Example

Quidway# show ip rip

RIP is turning oncheckzero is on default-metric : 16

neighbor 202.38.165.1

auto-summary is on preference : 100

The above information shows that: RIP is running with a metric of 16; no neighbor; theRIP preference is 100.

If a neighbor is specified, then the corresponding information is shown as follows:

neighbor :202.38.165.1

2.25 show ip rip snapshot

To display the configuration and running status of snapshot.

show ip rip snapshot

Command Mode


Usage Guideline

This command enables the user to learn the snapshot configuration and current statusof the current interfaces.

Example

Quidway# show ip rip snapshot

Interface Serial 0: snapshot clientLength of Active period: 5 minutesLength of Quiet period : 10 minutesLength of Retry period : 8 minutesCurrent status : Active , remain 3 minutes

The above information shows that: the length of active period for interface Serial 0 is 5

minutes; its length of quiet period is 10 minutes; its length of retry period is 8 minutes;

its current status is active, with 3 minutes remaining before timeout.


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2.26 debug ip rip

To turn on the RIP packet debugging switch.

debug ip rip { packet | recv | send }

Syntax Description

packet turn on the RIP packet-debugging switch.

recv turn on the RIP packets received debugging switch.

send turn on the RIP packets sent debugging switch.

Command Mode


Usage Guideline

This command enables you to learn the receiving and sending of RIP configurationpackets at the current interfaces.


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Chapter 3IGRP Configuration Commands

3-1

Chapter 3 IGRP Configuration Commands

IGRP configuration commands include:

l asysteml default-metricl distribute-list inl distribute-list outl host-routel ip igrp asysteml ip igrp inputl ip igrp outputl ip igrp snapshotl ip igrp split

l ip igrp workl metric holddownl metric maximum-hopsl metric weightsl neighborl networkl preferencel redistributel resetl router igrpl show ip igrpl show ip igrp snapshotl debug ip igrp

3.1 asystem

To assign the current AS number for IGRP, use the asystem command. To restore thedefault AS number for IGRP, use the no form of this command.

asystem as-number

no asystem

Syntax Description

as-numberAS number uniquely identifying the IGRP process in the router. It is alsoused to identify routing information. Ranging 1 to 65535.

Default

Default value of the current AS number for IGRP is 1

Command Mode

IGRP configuration mode


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Usage Guideline

This AS number is not the AS number for registration, so the user can randomly set anAS number.

Example

! Assign the current AS number for IGRP to be 2.

Quidway(config-router-igrp)# asystem 2

Related Command

ip igrp asystem

3.2 default-metric

To set default metric for a route redistributed by IGRP, use the default-metric

command. To remove the default metric and restore the default value, use the no formof this command.

default-metric bandwidth delay reliability loading mtu

no default-metric

Syntax Description

bandwidth minimum bandwidth in the route in kbytes/s, ranging 1 to 16777215.

delayroute delay in tens of microseconds, ranging 1 to 16777215.Reliability likelihood of successful packet transmission expressed, ranging 0 to 255(255 is 100 percent reliability).

loadingeffective bandwidth of the route, ranging 1 to 255 (255 is 100 percent loading).

mtu maximum transmit unit in bytes, ranging 1 to 65535.

Default

bandwidth=166777215, delay=166777215, reliability = loading=255, and mtu=1.

Command Mode


Usage Guideline

By default, IGRP does not advertise routes of other protocols, but it can redistributeroutes of other protocols by executing the redistribute command. If the metric is notyet set via the command when the redistribute command is run, then use the metric inthe default-metric command as the metric that should have been set via theredistribute command.

The metric of an redistributed route does not change, so this may result in serious

distortion as compared with dynamic routing information. So be careful in redistributing


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routes so as to avoid the deterioration of the performance of the local protocol routesdue to the redistributed routes.

Example

! Set the default metric for IGRP, bandwidth to be 1000, delay to 100, reliability to be250, loading to be 100 and mtu to be 1500.

Quidway(config-router-igrp)# default-metric 1000 100 250 100 1500

Related Command

redistribute

3.3 distribute-list in

1) To filter networks received in updates from specified gateway, use thedistribute-list gateway in command. To change or cancel the filter, use the noform of this command.

distribute-list gatewayprefix-list-name in

no distribute-list gateway prefix-list-name in

2) To filter networks received in updates, which match the specified access-list andprefix-list, use the distribute-list prefix in command. To change or cancel thefilter, use the no form of this command.

distribute-list {access-list-number| prefix-listprefix-list-name} in

no distribute-list {access-list-number | prefix-list prefix-list-name } in

Syntax Description



in applies the access list to incoming routing updates.

Default

Disabled

Command Mode


Usage Guideline

You can define the range of routes received by RIP by specifying the access list andprefix list.

Example

! Set the route redistributed through access-list 3.


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Quidway(config-router-igrp)# distribute-list 3 in

Related Command

access-list

3.4 distribute-list out

To suppress networks from being advertised in updates, use the distribute-list outcommand. To cancel this function, use the no form of this command.

distribute-list {access-list-number | prefix-list prefix-list-name } out [protocol]

nodistribute-list{access-list-number | prefix-list prefix-list-name } out [protocol]

Syntax Description



protocoldefines protocols distributing route information, including direct, static, rip, igrp,eigrp, ospf, ospf-ase, bgp.

Default

Disabled

Command Mode


Usage Guideline

You can define the range of routes advertised by RIP by specifying the access list andprefix list.

Related Command

access-list

3.5 host-route

To enable receiving the host route, use the host-route command. To disable thisfunction (reject the host route, use the no form of this command.

host-route

no host-route

Default

Enabled


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3-5

Command Mode


Usage Guideline

In some actual applications, sometimes a large number of host routes will be added to

the routing table. They may be useless for system, but occupy a lot of networkresources. To solve this problem, we design the host-route command, by which youcan decide if a host route should be received according to the actual requirement.

Example

! Disable receiving any host in IGRP.

Quidway(config-router-igrp)# no host-route

3.6 ip igrp asystem

To assign AS number supported at the interface, use the ip igrp asystem command.To restore the default AS number for IGRP, use the no form of this command.

ip igrp asystem as-number [ as-number ] [ as-number ] [as-number ] [ as-number][as-number]

ip igrp asystem

Syntax Description

as-numberAS number specified for IGRP in the router, which is used to identify routinginformation, ranging 1 to 65535.

Default

By default, the system supports the AS configured via the asystem command in IGRPconfiguration mode.

Command Mode


Usage Guideline

We have designed this command in order that IGRP can support multiple ASsconcurrently at different interfaces, that is, routes in multiple ASs can be received andtransmitted at the interfaces.

For each interface, the protocol supports the ASs configured via the asystemcommand. When this command is used at a certain interface, this interface canconcurrently support multiple ASs set via this command. An interface can support five

ASs at maximum.

Example

! Assign IGRP to support AS number 2, 3 and 7 respectively at Serial 0.


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Quidway(config-if-Serial0)# ip igrp asystem 2 3 7

Related Command

asystem

3.7 ip igrp input

To allow receiving the IGRP packets at the interface, use the ip igrp input command.

To disable the function (reject receiving the IGRP packets at the interface), use the noform of this command.

ip igrp input

no ip igrp input

Default

Any IGRP packet at the interface can be received

Command Mode


Usage Guideline

The ip igrp work command can be used to set the ip igrp input and ip igrp outputfunctions at the same time.

Example

! Allow receiving IGRP packet at Serial0.

Quidway(config-if-Serial0)# ip igrp input

Related Command

ip igrp output, ip igrp work

3.8 ip igrp output

To allow sending the IGRP packets at the interface, use the ip igrp input command. To

disable the function (reject sending the IGRP packets at the interface), use the no formof this command.

ip igrp output

no ip igrp output

Default

Any IGRP packet at the interface is allowed to be sent


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Command Mode


Usage Guideline

The ip igrp work command can be used to set the ip igrp input and ip igrp outputcommand.

Example

! Reject IGRP packets output at Serial 0.

Quidway(config-if-Serial0)# no ip igrp output

Related Command

ip igrp input, ip igrp work

3.9 ip igrp snapshot

To enable the IGRP snapshot function at the interface, use the ip igrp snapshotcommand. To disable this function, use the no form of this command.

ip igrp snapshot { client | server} active_interval} [ quiet_interval]

noip igrp snapshot { client | server}

Syntax Description

active_interval active time interval which is the time length for switching routinginformation between the Client and Server, ranging 5 to 1000 minutes.

quiet_intervalquiet time interval that is the time interval between the active_intervals.During this interval, all the routes at this interface will be locked up just as in the case ofthe static route, until the next active interval. It ranges from 8 to 100000 minutes. Thequiet_interval should be 3 minutes greater than the active_interval.

Default

The function is disabled

Command Mode


Usage Guideline

The active interval at Server and that at Client should be the same.

Example

! Configure two routers connected through serial port. Set the active interval and the

quite interval on the client to be 5 minutes and 1000 minutes. Set the active interval onthe server to be 5 minutes.


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1) Configuring router A:


Quidway(config-if-Serial0)# ip igrp snapshot client 5 1000

2) Configuring router B:


Quidway(config-if-Serial0)# ip igrp snapshot server 5

Related Command

show ip igrp snapshot

3.10 ip igrp split

To enable the split horizon mechanism, use the ip igrp split command. To disable thesplit horizon mechanism, use the no form of this command.

ip igrp split

noip igrp split

Default

Split horizon mechanism is disabled

Command Mode


Usage Guideline

To avoid the formation of loop routes, IGRP performs horizontal split when sendingupdate packets, that is, it will not retransmit the routes from the remote router to thisremote router. But there is an exception where this command does not work at anpoint-to-point interface, that is, horizontal split is a must at the point-to-point interface.What s more, horizontal split is masked at some special interfaces, so this command isnot used in principle.

Example

! Disable the split horizon mechanism at Serial 0.

Quidway(config-if-Serial0)# no ip igrp split

3.11 ip igrp work

To enable the RIP work at the interface, use the ip rip work command. To disable it,use the no form of this command.

ip igrp work

no ip igrp work


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Default

The IGRP is enabled work at the interface

Command Mode


Usage Guideline

The function of ip igrp work command is equal to the ip igrp input and ip igrp outputcommands.

Example

! Enable IGRP work at Serial 0.

Quidway(config-if-Serial0)# no ip igrp work

Related Command

ip igrp input, ip igrp output

3.12 metric holddown

To enable routing holddown method in IGRP ( keep new IGRP information from beingused for a certain period of time), use the metric holddown command. To disable thefeature, use the no form of this command.

metric holddown

nometric holddown

Default

Metric holddown method is enabled

Command Mode


Usage Guideline

Holddown keeps new routing information from being used for a certain period of time.This can prevent routing loops caused by slow convergence. But it is sometimesadvantageous to disable holddown to increase the network s ability to quickly respondto topology changes.

Be sure that the configuration of all routers in the IGRP autonomous system is thesame. If all routers are not configured the same way, you increase the possibility ofrouting loops.

Example

! Disable routing holddown method on the router.


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Quidway(config-router-igrp)# no metric holddown

3.13 metric maximum-hops

To assign a maximum hop count for a route in IGRP, use the metric maximum-hopscommand. To reset the value to the default, use the no form of this command.

metric maximum-hops hops

no metric maximum-hops

Syntax Description

hops maximum hops count, ranging 1 to 255.

Default

The default maximum hops count for an IGRP route is 100

Command Mode


Usage Guideline

This command provides a safety mechanism that breaks any potential count-to-infinityproblems. It causes the IP routing software to advertise as unreachable routes with ahop count greater than the value assigned by this command.

Example

! Assign the maximum route hop count in IGRP to be 200.

Quidway(config-router-igrp)# metric maximum-hops 200

3.14 metric weights

To assign the constant coefficients (k1, k2, k3, k4 and k5) for metric calculation of IGRP,use the metric weights command. To reset the values to their defaults, use the noform of this command.

metric weights tosk1 k2 k3 k4 k5

no metric weights

Syntax Description

tos Type of Service (currently it must be zero), ranging 0 to 8.

k1,k2,k3,k4,k5are the constant coefficients of bandwidth, loading, delay, reliabilityrespectively.

Default

tos=0; k1=k3=1; k2=k4=k5=0


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Command Mode


Usage Guideline

The metric in IGRP is a weight metric, and is calculated based on such feature values

as bandwidth, delay, reliability, and loading. k1, k2, k3, k4, and k5 are constantcoefficients for calculation. The greater the value of k is, the large proportion the featurerelevant with it has in the weighted metric. If k is 0, then this indicates that this featurevalue is not considered in the weight metric. k1 is the weight for bandwidth, k2is theweight for loading, k3 is the weight for delay, and k4 and k5are weights for reliability (k4is a weight in direct ratio and k5is a weight in inverse ratio).

In metric calculation, different TOSs can be provided according to the K values. For

example, some service has a higher delay requirement, then k3 can be set to a greatervalue. In this way, more consideration is given to delay during route selection, and the

delay service is provided.

Example

! Set the constant weights for metric constant coefficients in IGRP as follows:

tos = 0, k1 = 2, k2= 0, k3 = 2, k4 = 0 and k5=0.

Quidway(config-router-igrp)# metric weights 0 2 0 2

3.15 neighbor

To define a neighboring router with which to exchange routing information, use theneighborcommand. To remove an entry, use the no form of this command.

neighborip-address

no neighborip-address

Syntax Description

ip-address IP address specified as a neighboring router.

Default

No neighboring routers are specified

Command Mode


Usage Guideline

neighbor is used to set the IP address of a fixed destination to which a packet can betransmitted. This is for meeting the requirement of some specific non-broadcastnetwork to which packets with broadcast addresses can not be transmitted. Normally,this command is not recommended.


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Example

! Set IP address 129.102.0.1 as the neighboring router.

Quidway(config-router-igrp)# neighbor 129.102.0.1

Related Command

05RC(Routing Protocol Configuration Command)

Documents

Transcript of 05RC(Routing Protocol Configuration Command)