Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
Silver

Basic VTP Question

In a basic VTP scenario with one only VTP domain and one only VTP server, what happen to client switches when server fails:

- Do clients lost all its VTP information ?

- Does a client become server ?

- Clients keep being clients but there's no VTP update ?

Thanks in advance

4 REPLIES
Bronze

Re: Basic VTP Question

Client's do not lose its own vlan database inf a server is remoted.

A client does not change its vtp mode to server if the only vtp server is removed from the network.

Clients will continue be clients.

Note: that the only difference between a VTP client and vtp server is that a vtp server can make changes to the vlan database in the VTP domain. All vtp devices, both clients and servers send out VTP packets. That's why it is possible to insert a vtp client into the network and it could blow away the whole vlan database for the vtp domain if its configuration revision number is higher then any other vtp device.

Reference:

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml#flash

Silver

Re: Basic VTP Question

Thanks for your response. I did this question because we're changing our LAN infrastructure. We're going to replace our old 5500 for two 6500s. Now they're all connected in the same LAN, 5500 is VTP server and 6500s are VTP clients. What are recommended steps to remove 5500 from LAN and one of the 6500 become VTP server with minimal network disruptions?

Thanks

Re: Basic VTP Question

Just change one 6500 to the server mode.

The only difference is that it will save the VLAN database info to it's config.

(Generally, you should always have at least two VTP servers in your network as a backup for the case of one server failure.)

Wait some time for the new server to save the VLAN database (cca 10 minutes should be enough, use sh config in CatOS to see VLAN info in config ).

Then remove the 5500 form the network and make the second 6500 a VTP server, too.

Regards,

Milan

Silver

Re: Basic VTP Question

Thank you all.

88
Views
10
Helpful
4
Replies
CreatePlease to create content