Re: VTP Question on Router

You can also try to use VTP Version 3.

Prevents unintended VLAN Database overrides during insertion of new
switches in the VTP domain Adding a configured switch to a VTP version 2
domain imposed a risk of the VLAN database could be overwritten in a VTP
version 2 domain based on the configuration revision number. In VTP version
2, only the configuration revision number was compared, and no further
sanity check was available. With VTP version 3 only a switch in VTP primary
server mode is able to update the domain.
*Configuration:*
*Switch#vtp primary vlan*

RBK

On Thu, Aug 7, 2014 at 11:50 AM, Andrew LaPorte <andy_at_cloud9.net> wrote:

> If you not going to use vlan on the routers I would turn it off on them.
>
> Another suggestion would be to change the VTP domain name and password.
>
> Andy
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> jesus And Pals
> Sent: Thursday, August 7, 2014 10:00 AM
> To: ccielab_at_groupstudy.com
> Subject: VTP Question on Router
>
> Hi Group ,
>
> We recently had a large outage because of some VTP switches left in the
> core
> with VTP mode server . and a customer plugged in his switch 3 layers down
> which re-wrote our vlans .
>
> So we were asked to go and look at all devices and check VTP modes .
> Its a no brainer for swh to be set to transparent mode on our environment .
>
> But we have some legacy 28xx and 38xx . which show up on solar winds
> reports
> as vtp mode server .
> Cisco says that since these routers have the ability to support erther
> switch modules they support the command . and unless hardware is plugged in
> or vlan 1 is configured we should be good .
>
> They also said we could go and turn it off .
> My question to the group is should we even mess with the config and turn
> vtp
> off on the routers?
> Or should we just let it be ?
>
> We do not intend to plug in swh modules on those routers any time in the
> future .
>
>
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Received on Thu Aug 07 2014 - 12:27:22 ART