VTP Password Command on CISCO Router/Switch

Command

VTP Password

Use

This command secures VTP updates by setting a secure password.

Syntax

Switch(vlan)#vtp password <password>

Example

In the below example we will set a password of ‘cisco’ for the VTP domain on SW1.

SW1#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.

SW1(vlan)#vtp password cisco
Setting device VLAN database password to cisco
SW1(vlan)#exit
APPLY completed.
Exiting….
SW2#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.
SW2(vlan)#vtp password cisco
Setting device VLAN database password to cisco
SW2(vlan)#exit
APPLY completed.
Exiting….

Checking VTP status on both switches we see that the MD5 digest matches. If it doesn’t you’ll need to flap a few interfaces until VTP syncs up.

SW1(config)#do show vtp status
VTP Version : 2
Configuration Revision : 22
Maximum VLANs supported locally : 1005
Number of existing VLANs : 18
VTP Operating Mode : Server
VTP Domain Name : howtonetwork.net
VTP Pruning Mode : Enabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xAC 0x9B 0x5F 0xEE 0xED 0x93 0x22 0xF8 
Configuration last modified by 0.0.0.0 at 3-1-93 04:05:30
Local updater ID is 0.0.0.0 (no valid interface found)
SW2(config)#do show vtp status
VTP Version : 2
Configuration Revision : 22
Maximum VLANs supported locally : 1005
Number of existing VLANs : 18
VTP Operating Mode : Server
VTP Domain Name : howtonetwork.net
VTP Pruning Mode : Enabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xAC 0x9B 0x5F 0xEE 0xED 0x93 0x22 0xF8
Configuration last modified by 0.0.0.0 at 3-1-93 04:05:30
Local updater ID is 0.0.0.0 (no valid interface found)
SW2(config)#

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