VTP configuration (virtual LAN relay protocol)

Switch#delete Flash:vlan.dat

Switch#erase Start-config Clear Saved configuration

VTP configuration

The topology diagram is as follows:

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(1) Configuring the Relay

S1 (config) #interface fastethernet 0/1

S1 (config-if) #switchport mode dynamic desirable

S2 (config) #interface fastethernet 0/1

S2 (config-if) #switchport mode dynamic desirable

S3 (config) #interface fastethernet 0/1

S3 (CONFIG-IF) #switchport mode dynamic desirable

S3 (config) #interface fastethernet 0/2

S3 (CONFIG-IF) #switchport mode dynamic desirable

S3#show Interfaces Trunk

(2) Check the default VTP condition

S1#show VTP Status

(3) Configure S1 for VTP server, configure VTP domain name, create VLAN2

S1 (config) #vtp mode server (configuration S1 as VTP server, which is actually the default)

S1 (config) #vtp domain vtp-test (configure VTP domain name, default is empty)

S1#show VTP Status

S1 (config) #vlan 2

S1 (Config-vlan) #name vlan2-test

S1#show VLAN

Check on S3 and S2.

S3#show VTP Status

S3#show VLAN

S2#show VTP Status

S2#show VLAN

(4) configuring S3 for VTP Transparent

S3 (config) #vtp mode transparent (or S3#vlan database S3 (VLAN) #vtp transparent)

S3#show VTP Status

Create VLAN3 on S3, check VLAN information on S1 and S2

S3 (config) #vlan 3

S3 (Config-vlan) #name test-vlan3

S3#show VLAN

S2#show VLAN

(5) Configuring S2 for VTP Client

S2 (config) #vtp mode client

(6) Configuring a VTP password

S1 (config) #vtp password Xu (Configuring the VTP password for security purposes, to prevent unknown switches from joining the domain.) When you want to increase the switch, if the added switch sets the same VTP password as the VTP password in the domain, you can learn the VLAN information, or you will not be able to learn VLAN information.

S3 (config) #vtp password Xu

S2 (config) #vtp password Xu

S1#show VTP password (display VTP password)

(7) Configure the VTP version to configure only on the server

S1 (config) #vtp version 2

S1#show VTP Status

(8) VTP Domain Name issues

The VLAN information cannot be shared between different VTP domains.

To delete a VLAN command:

Switch (config) #vlan 12

Switch (Config-vlan) #no VLAN 12

A VTP notification with a high revision number (Configuration Revision) overrides the low-revision VTP information, including the revision number and VLAN, and increases each time the VLAN revision number is modified. The revision number defaults to 0, and you can change the VTP domain name to replace the revision number with 0

This article from the "Galaxy | Computer network" blog, declined to reprint!

VTP configuration (virtual LAN relay protocol)