Migrating to VTP Version 3

[johnlloyd_13]

hi,

i got a mix of VTPv1 and VTPv2 on different LAN campus environments and plan to standardize to VTPv3. i tried to google and pointed me to white paper and blogs on VTPv3. my question is, could someone share a guide or plan to migrate to VTPv3 or it is just stragithforward config? any rule of thumb?

i also got mix of legacy STP, RSTP+ and MSTP on different LAN campuses, is it required to migrate to MSTP as well when using VTPv3? or is this optional?

also, any gotchas to look out? IOS code, VTP pruning, VSS, we also got Nexus (is it same CLI command?)

i plan to do lab this up on my pile of 3560 soon but need to want to hear first from the folks here at CSC.

[Julio E. Moisa]

Hi

MSTP is not mandatory for VTP v3, Also you must take in consideration that not all the switches support VTP v3, I recommend this tools to verify the platform and device (click on research Software an select platform): http://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/index.jsp

Now the following link can be useful for VTP v3:

http://brbccie.blogspot.com/2014/07/vtp-v3.html

http://www.ipwithease.com/vtp-version-3/

The following link is for Nexus but the commands are similar:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus6000/sw/layer2/7x/b_6k_Layer2_Config_7x/config_vtp_v3.pdf

VTPv3 and MST is great because it can propagate MST config to other switches, but again it is not mandatory.

Hope it is useful

:-)

[paul driver]

Hello

Just like to add my lab notes I created when reviewed VTP3.

Transition from vtp 1-2 to vtp 3
New vtp primary server  - ( you can have a switch as a vtp server or a vtp PRIMARY server)
1)Choose switch to become vtp 3 primary server
2)Change vtp ver to 3 ( this WILL NOT change or erase the current vtp DB)
3) Promote switch to vtp primary and hide the password

Note:
if you change the vtp3 domain name AFTER promoting the switch to a primary server  then
you will need to re-promote it again!!!!

conf t
vtp ver 3
vtp password xxxx hidden
exi
vtp primary | force| vlan|mst  - ( mst enables the use of STP MST)

Clients
1) Choose switch to become vtp 3 client
2) Change vtp ver to 3 ( this will initiate a synchronization of the switch vtp DB to that of the new vtp3 priamry server vtp D/B -  As long as the password /domain are the same)

3) Change password to be hidden ( optional)

Note
Moving switch back to the old vtp1/2 server (  just change the vtp ver number back to 1/2 as it was before – providing there is an active vtp1/2 server running – with the same domain/password etc)

 Make sure that apply the correct vtp version number when reverting back to vtp ver1/2 as if you apply the incorrect version number this will initiate
 a vtp ver number propagation throughout the vtp1/2 domain to all switches – So don’t enable vtp ver 2 unless all switches in the domain support vtp ver 2.

Also if the switch you are reverting is running as vtp server ( NOT Primary)  when reverting back to vtp 1/2 and it has configuration revision number higher than that of the existing vtp1/2 server, it WILL change the vtp1/2 vtp database of all switches in that domain!)

res
Paul