CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
-
Upload
httpheiserzcom -
Category
Documents
-
view
241 -
download
1
Transcript of CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 1/65
Chapter 3 - VLANS
CCNA Ex loration 4.0
1
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 2/65
Objectives
• Explain the role of VLANs in a network.
• Explain the role of trunking VLANs in a network.
• Troubleshoot the common software or hardwareconfiguration problems associated with VLANs on switchesin a network topology.
Hc vin mng Bach Khoa - Website: www.bkacad.com 2
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 3/65
Role of VLANS
• One of the contributing technologies toexcellent network performance is the
separation of large broadcast domains intosmaller ones with VLANs.
Hc vin mng Bach Khoa - Website: www.bkacad.com 3
of devices participating in broadcasts andallow devices to be separated into functional
groupings, such as database services for anaccounting department and high-speed datatransfer for an engineering department.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 4/65
Before VLANS
1 building
Hc vin mng Bach Khoa - Website: www.bkacad.com 4
• no problem !
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 5/65
Before VLANS
Hc vin mng Bach Khoa - Website: www.bkacad.com 5
Many building
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 6/65
Before VLANS
• Many building: Problem ? – IT department wants to ensure that student
computers all share the same security featuresand bandwidth controls. How can the networkaccommodate the shared needs of theeo ra hicall se arated de artments? Do ou
Hc vin mng Bach Khoa - Website: www.bkacad.com 6
create a large LAN and wire each departmenttogether?• It would be great to group the people with the
resources they use regardless of their geographic
location, and it would make it easier to managetheir specific security and bandwidth needs.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 7/65
VLAN overview
Hc vin mng Bach Khoa - Website: www.bkacad.com 7
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 8/65
VLAN overview
• A VLAN allows a network administrator
to create groups of logically networkeddevices that act as if they are on theirown inde endent network
Hc vin mng Bach Khoa - Website: www.bkacad.com 8
• These VLANs allow the networkadministrator to implement access and
security policies to particular groups ofusers.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 9/65
VLANS details
Hc vin mng Bach Khoa - Website: www.bkacad.com 9
• A VLAN is a broadcast domain created by one or moreswitches.
• The network design above creates three separatebroadcast domains.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 10/65
Benefit of VLANS
Hc vin mng Bach Khoa - Website: www.bkacad.com 10
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 11/65
VLAN ID
Hc vin mng Bach Khoa - Website: www.bkacad.com 11
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 12/65
Extra: Extended Range VLANs
• Configuring Extended-Range VLANs – When the switch is in VTP transparent mode (VTP disabled), you can
create extended-range VLANs (in the range 1006 to 4094 for any switchport commands that allow VLAN IDs).
– Enter the vlan vlan-id global configuration command to access config-vlanmode and to configure extended-range VLANs. – The VLAN database configuration mode (that you access by entering the
vlan database privileged EXEC command) does not support the extendedrange.
Hc vin mng Bach Khoa - Website: www.bkacad.com 12
– x en e -range con gura ons are no s ore n e a a ase.
Because VTP mode is transparent, they are stored in the switch runningconfiguration file. You can save the configuration in the startupconfiguration file by using the copy running-config startup-configprivileged EXEC command.
– Example:Switch(config)# vtp mode transparent
Switch(config)# vlan 2000
Switch(config-vlan)# endSwitch# copy running-config startup config
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 13/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 13
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 14/65
VLAN Tagging
No VLAN Tagging
Hc vin mng Bach Khoa - Website: www.bkacad.com 14
VLAN Tagging
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 15/65
VLAN Tagging
Hc vin mng Bach Khoa - Website: www.bkacad.com 15
•There are two major methods of frame tagging, Cisco proprietary Inter-Switch Link (ISL) and IEEE 802.1Q.
• ISL used to be the most common, but is now being replaced by 802.1Qframe tagging.
• Cisco recommends using 802.1Q.
• VLAN Tagging and Trunking will be discussed in the next chapter.
802.10
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 16/65
Types of VLAN
• Data VLAN: A data VLAN is a VLAN that is configured tocarry only user-generated traffic.
Hc vin mng Bach Khoa - Website: www.bkacad.com 16
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 17/65
Types of VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 17
• Default VLAN: – All switch ports become a member of the default VLAN after the
initial boot up of the switch.
– Having all the switch ports participate in the default VLAN makesthem all part of the same broadcast domain. This allows any deviceconnected to any switch port to communicate with other devices onother switch ports.
– The default VLAN for Cisco switches is VLAN 1. VLAN 1 has all thefeatures of any VLAN, except that you cannot rename it and youcan not delete it.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 18/65
Types of VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 18
• Management VLAN:
– A management VLAN is any VLAN you configure to access themanagement capabilities of a switch.
– VLAN 1 would serve as the management VLAN if you did notproactively define a unique VLAN to serve as the managementVLAN.
– You assign the management VLAN an IP address and subnet
mask. A switch can be managed via HTTP, Telnet, SSH, or SNMP.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 19/65
Types of VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 19
• Native VLAN:
– A native VLAN is assigned to an 802.1Q trunk port.
– An 802.1Q trunk port supports traffic coming from manyVLANs (tagged traffic) as well as traffic that does notcome from a VLAN (untagged traffic).
– The 802.1Q trunk port places untagged traffic on the
native VLAN. In the figure, the native VLAN is VLAN 99.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 20/65
Native VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 20
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 21/65
Types of VLAN
• Voice VLAN: – It is easy to appreciate why a separate VLAN is needed to support
Voice over IP (VoIP) – VoIP traffic requires:
• Assured bandwidth to ensure voice quality• Transmission priority over other types of network traffic• Ability to be routed around congested areas on the network•
Hc vin mng Bach Khoa - Website: www.bkacad.com 21
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 22/65
Voice VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 22
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 23/65
Types of traffic
Hc vin mng Bach Khoa - Website: www.bkacad.com 23
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 24/65
Types of traffic
Hc vin mng Bach Khoa - Website: www.bkacad.com 24
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 25/65
Types of traffic
Hc vin mng Bach Khoa - Website: www.bkacad.com 25
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 26/65
Types of traffic
Hc vin mng Bach Khoa - Website: www.bkacad.com 26
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 27/65
Switch port membership
Hc vin mng Bach Khoa - Website: www.bkacad.com 27
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 28/65
Controlling Broadcast Domains withVLANs
Hc vin mng Bach Khoa - Website: www.bkacad.com 28
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 29/65
Switch 1172.30.1.21
255.255.255.0 172.30.2.12255.255.255.0
ARP Request
Without VLANs – No Broadcast Control
Hc vin mng Bach Khoa - Website: www.bkacad.com 29
No VLANs
Same as a single VLAN
Two Subnets
172.30.2.10255.255.255.0
172.30.1.23255.255.255.0
• Without VLANs, the ARP Request would be seen by all hosts.
• Again, consuming unnecessary network bandwidth and host processingcycles.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 30/65
Switch 1172.30.1.21
255.255.255.0
VLAN 1
172.30.2.12
255.255.255.0
VLAN 2
Switch Port: VLAN IDARP Request
With VLANs – Broadcast Control
Hc vin mng Bach Khoa - Website: www.bkacad.com 30
Two VLANs
Two Subnets
172.30.2.10255.255.255.0
VLAN 2
172.30.1.23255.255.255.0
VLAN 1 1 2 3 4 5 6 .
1 2 1 2 2 1 .
Port
VLAN
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 31/65
Intra-VLAN Communication
• Communicating with a device in the same VLAN is calledintra-VLAN communication.
Hc vin mng Bach Khoa - Website: www.bkacad.com 31
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 32/65
Inter-VLAN Communication
• Communicating with a device in another VLAN is calledinter-VLAN communication.
Hc vin mng Bach Khoa - Website: www.bkacad.com 32
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 33/65
Controlling Broadcast Domains with VLANs and Layer 3 Forwarding
Hc vin mng Bach Khoa - Website: www.bkacad.com 33
• SVI (switch virtual interface ) – SVI is a logical interface configured for a specific VLAN. You need to configure an
SVI for a VLAN if you want to route between VLANs or to provide IP hostconnectivity to the switch.
– An SVI is a virtual Layer 3 interface that can be configured for any VLAN that exists
on a Layer 3 switch.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 34/65
VLAN Trunking
Hc vin mng Bach Khoa - Website: www.bkacad.com 34
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 35/65
VLAN Trunk
Hc vin mng Bach Khoa - Website: www.bkacad.com 35
• A trunk is a point-to-point link between one or more Ethernet switch interfaces andanother networking device, such as a router or a switch.
• A VLAN trunk does not belong to a specific VLAN, rather it is a conduit for VLANs
between switches and routers.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 36/65
VLAN Trunk
Hc vin mng Bach Khoa - Website: www.bkacad.com 36
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 37/65
802.1Q tagging
Hc vin mng Bach Khoa - Website: www.bkacad.com 37
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 38/65
802.1Q tagging
• EtherType field
– Set to the hexadecimal value of 0x8100. This value iscalled the tag protocol ID (TPID) value. With theEtherType field set to the TPID value, the switch receivingthe frame knows to look for information in the tag controlinformation field.
Hc vin mng Bach Khoa - Website: www.bkacad.com 38
• Tag control information field – 3 bits of user priority - Used by the 802.1p standard, which specifies how to provide
expedited transmission of Layer 2 frames. A description of the IEEE 802.1p is beyondthe scope of this course; however, you learned a little about it earlier in the discussionon voice VLANs.
– 1 bit of Canonical Format Identifier (CFI) - Enables Token Ring frames to be carriedacross Ethernet links easily.
– 12 bits of VLAN ID (VID) - VLAN identification numbers; supports up to 4096 VLANIDs.
• FCS field
– After the switch inserts the EtherType and tag control information fields, it recalculatesthe FCS values and inserts it into the frame.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 39/65
Extra: IEEE 802.1p
• IEEE 802.1p is a standard that provides traffic class expediting anddynamic multicast filtering. Essentially, it provides a mechanism forimplementing Quality of Service (QoS) at the MAC (Media Access
Control) level.• Eight different classes of service are available, expressed through the3-bit user_priority field in an IEEE 802.1Q header added to the frame.The way traffic is treated when assigned to any particular class is
Hc vin mng Bach Khoa - Website: www.bkacad.com 39
undefined and left to the implementation. The IEEE however has made
some broad recommendations.
• 802.1p is used within the IEEE 802.1D and IEEE 802.1Q standards.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 40/65
Extra: ISL Encapsulation Frame
Hc vin mng Bach Khoa - Website: www.bkacad.com 40
Q
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 41/65
Native Vlan and 802.1Q
Hc vin mng Bach Khoa - Website: www.bkacad.com 41
• When you configure an 802.1Q trunk port, a default Port VLAN ID(PVID) is assigned the value of the native VLAN ID.
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 42/65
Extra: Basics of Dynamic Trunking Protocol (DTP)
Hc vin mng Bach Khoa - Website: www.bkacad.com 42
• Ethernet trunk interfaces support several different trunking modes.
– Access – Dynamic desirable (default mode on Catalyst 2950 and 3550) – Dynamic auto – Trunk – Non-negotiate – dotq-tunnel (Not an option on the Catalyst 2950.)
T ki d
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 43/65
• The trunking modes available in Fast Ethernet and Gigabit Ethernet
Trunking mode
(config-if)#switchport mode trunk
Hc vin mng Bach Khoa - Website: www.bkacad.com 43
switchport mode access
switchport mode dynamic desirable
switchport mode dynamic auto
Nonegotiateswitchport nonegotiate
E t T ki d
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 44/65
Extra: Trunking mode
• trunk —Configures the port to permanent trunk mode and negotiateswith the connected device on the other side to convert the link to trunkmode. If multiple trunk encapsulations are available, the encapsulationmust be chosen before this command will work.
• access —Disables port trunk mode and negotiates with the connecteddevice to convert the link to nontrunk. This port will belong to only theconfigured access VLAN.
• dynamic desirable —Triggers the port to negotiate the link from
Hc vin mng Bach Khoa - Website: www.bkacad.com 44
connected device is in the trunk, dynamic desirable, or dynamicauto state. Otherwise, the port becomes a nontrunk port. This is thedefault for IOS switch ports
• dynamic auto —Enables the port to become a trunk only if theconnected device has the state set to trunk or dynamic desirable.
• nonnegotiate —Configures the port to permanent trunk mode. Nonegotiation takes place with the partner. The other side must be trunkor nonegotiate for the trunk to work. You must also specify theencapsulation before choosing this mode.
Trunking mode
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 45/65
Trunking mode
Hc vin mng Bach Khoa - Website: www.bkacad.com 45
Trunking mode
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 46/65
Trunking mode
Hc vin mng Bach Khoa - Website: www.bkacad.com 46
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 47/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 47
Creating VLANs
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 48/65
Creating VLANs
• Add a VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 48
Extra: Creating VLANs
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 49/65
Extra: Creating VLANs
Switch#vlan database
Hc vin mng Bach Khoa - Website: www.bkacad.com 49
Switch(vlan)#vlan {vlan_id } [name {vlan_name}]
Switch(vlan)#exit
• switch# vlan database
% Warning: It is recommended to configure VLAN from config mode,as VLAN database mode is being deprecated. Please consult user
documentation for configuring VTP/VLAN in config mode.
Assign VLAN to port
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 50/65
Assign VLAN to port
Hc vin mng Bach Khoa - Website: www.bkacad.com 50
Extra: Configuring Ranges of VLANs
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 51/65
Extra: Configuring Ranges of VLANs
SydneySwitch(config)#interface range fastethernet0/8 ?
, comma
vlan 3
Hc vin mng Bach Khoa - Website: www.bkacad.com 51
- hyphen
(config)#interface range fastethernet0/8 -12
(config-if-range)#switchport access vlan 3
(config-if-range)#exit
(config)#interface range fastethernet0/8 ,fastethernet0/12
(config-if-range)#switchport access vlan 3
(config-if-range)#exit
Verify VLAN
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 52/65
Verify VLAN
Hc vin mng Bach Khoa - Website: www.bkacad.com 52
show vlan
show vlan brief
show interface vlan 2
show interface fa0/18 switchport
Delete Vlan
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 53/65
Delete Vlan
Hc vin mng Bach Khoa - Website: www.bkacad.com 53
• (config)# no vlan vlan_id
• # delete flash:vlan.dat
Configure a Trunk link
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 54/65
Configure a Trunk link
Hc vin mng Bach Khoa - Website: www.bkacad.com 54
Extra: switchport trunk
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 55/65
Extra: switchport trunk
Hc vin mng Bach Khoa - Website: www.bkacad.com 55
• Remove VLANs from the current list of the trunking line:(config-if)# switchport trunk allowed vlan remove vlan-id
• If a VLAN other than VLAN 1 is to be the Native VLAN, it needs to be identified on thetrunk ports:(config-if)# switchport trunk native vlan vlan-id
Extra: Specify the Trunk Encapsulation
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 56/65
Extra: Specify the Trunk Encapsulation
Hc vin mng Bach Khoa - Website: www.bkacad.com 56
Verify Trunk Configuration
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 57/65
y g
• show interfaces interface-ID switchport
Hc vin mng Bach Khoa - Website: www.bkacad.com 57
• show interface trunk
Managing a Trunk Configuration
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 58/65
g g g
Hc vin mng Bach Khoa - Website: www.bkacad.com 58
Common Problems with Trunks
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 59/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 59
Native VLAN mismatchs
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 60/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 60
Trunk mode mismatch
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 61/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 61
• Solution: (config-if)# switchport mode trunk
Incorrect VLAN list
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 62/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 62
• Solution: – S1 f0/3: (config-if)# switchport trunk allowed vlan 10, 20, 99
Mistake of VLAN and IP subnets
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 63/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 63
Lab
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 64/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 64
Summary
8/3/2019 CCNA Exp3 - Chapter03 - VLANS.ppt [Compatibility Mode]
http://slidepdf.com/reader/full/ccna-exp3-chapter03-vlansppt-compatibility-mode 65/65
Hc vin mng Bach Khoa - Website: www.bkacad.com 65