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Webcast-Catalyst9k
New Member

If all my vtp server fail,are traffic on vtp client normal?

If all my vtp server fail,are traffic on vtp client normal?

I think it's normal although I can't modify vlan info,but I am not sure.

thanks!

5 REPLIES
Cisco Employee

Re: If all my vtp server fail,are traffic on vtp client normal?

No..You'll loose the VLAN information if you have a single VTP server. It's advisable to have multiple VTP servers if you are using a client-server topology or use VTP transparent mode

http://www.cisco.com/warp/public/473/21.html

New Member

Re: If all my vtp server fail,are traffic on vtp client normal?

thanks for your help!

I do a lab like this:

there are two switch,

3550a is vtp server

3550b is vtp client

I do "sh vlan " on the 3550b when I reload 3550a,all vlan on the 3550b is still active,so I think traffic can be normal even if all vtp server is fail . Am I right?

thanks!

Cisco Employee

Re: If all my vtp server fail,are traffic on vtp client normal?

3550/2950/XLs are a little different as they have VLAN databases

New Member

Re: If all my vtp server fail,are traffic on vtp client normal?

On your url ,I found this:The only differences between the server and the client is that VLAN cannot be configured directly on a client, and the

client does not remember the VLAN after a reboot (no VLAN information is written in NVRAM).

So I think everything will ok if I don't reboot my vtp client switch after all vtp server fail.Am I right?

thanks very much.

Re: If all my vtp server fail,are traffic on vtp client normal?

You are correct.

As long as one VTP client is up in your network the VLAN info is available.

You can even reload an IOS based VTP client (with VLAN database in vlan.dat file on it's flash) and the VLAN info is still remaining.

The only problem is you are not able to change VLAN definitions when no VTP server is running. But you can always change one VTP client into server mode.

BUT generally: It's always better (and more comfortable) to have redundant VTP servers in your network.

Regrds,

Milan

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