vtp mode change

[suthomas1]

We have a main switch at our main office & another switch in one of our smaller branch offices.
Both these offices are very close to each other & they are connected over physical links.

Office-B1 will be moved to a new connection & new subnets will be created.
Currently both switches are in VTP server mode. My question is, if we start creating other vlans on the office-B1 switch while still being connected to Main-office switch will this affect the Main-office switch?

The steps i will be using is:-

1. Change vtp mode on Office-B1 switch to transparent mode , while it is still being connected to Main office switch
2. create new vlans on Office-B1

(final state will be office-B1 will no longer have direct physical link to Main office switch)

In doing so, will it impact the main office switch in terms of its vlans? I am concerned that the Main office switch may get affected if i change the vtp mode to transparent on Office-B1 switch.

Outputs from both switches are given here. Please help.

Office-B1#sh vtp status
VTP Version : 2
Configuration Revision : 2
Maximum VLANs supported locally : 1005
Number of existing VLANs : 7
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0x91 0xEC 0xAE 0xFC 0x82 0x1E 0x0C 0x60
Configuration last modified by 10.58.0.20 at 3-6-93 21:34:15
Local updater ID is 10.58.0.20 on interface Vl1 (lowest numbered VLAN interface found)

======================================================================

Main-Office#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 1
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Configuration last modified by 10.58.0.3 at 3-7-93 02:19:16
Local updater ID is 10.58.0.3 on interface Vl1 (lowest numbered VLAN interface found)

Feature VLAN:
--------------
VTP Operating Mode : Server
Maximum VLANs supported locally : 1005
Number of existing VLANs : 7
Configuration Revision : 3
MD5 digest : 0x28 0xBF 0xA9 0x38 0x3F 0xB9 0x8A 0xFA
0x99 0xCA 0x3C 0x69 0xF0 0x23 0xA5 0x12

where; 
10.58.0.20 > Office-B1 switch
10.58.0.3 > Main-office switch

[johnlloyd_13 · Accepted solution]

hi,

there should be no impact on the Main-office switch when changing Office-B1 switch to VTP transparent mode.

Office-B1 switch retains its VLANs but you'll need to manually configure new VLANs once it becomes VTP transparent.

i also suggest changing VTP version 2 on Main-office switch to have a consistency.

it's always wise to perform these on a change window with minimal user traffic.

[suthomas1]

Thanks.

So, just in case things go wrong on the office-B1 switch (as the vtp mode will be changed on it) ; what would be the workaround - putting it back to VTP server?

my worry is more for any impact to the main office switch when doing the vtp mode change to transparent on Office-B1 switch.

[johnlloyd_13]

hi,

it's always prudent to do a roll back if things went wrong.

that's why i recommended to perform changes in a change window (if your IT policy has one).