VTP mesages through a router

mobrmobr Member Posts: 3 ■□□□□□□□□□

I am studying for my CCNP and have not been able to find an answer to a VTP set up on a home lab.

I have 2 switches seperated by a router. I have switch A set VTP server and swicth B set as VTP client but cannot get VLANs to update to switch B.

I have tried setting the router to the same VTP domain, version, password etc and also tried it in transparent mode but still i cant get any joy.

Surely there must be a way?




  • jason_lundejason_lunde Member Posts: 567
    Check your revision numbers.
  • EdTheLadEdTheLad Member Posts: 2,111 ■■■■□□□□□□
    Config the router interfaces to be in the same bridge group.Remove ip addresses etc and add the command "bridge-group 1" under each interface, this will allow traffic to be bridged transparently through the router.
    Networking, sometimes i love it, mostly i hate it.Its all about the $$$$
  • mobrmobr Member Posts: 3 ■□□□□□□□□□
    Guys - thanks for the quick replies.

    I think I may have mislead you a bit. What I should have said is that I have just passed my CCNA and have only started on the CCNP track so your patience would be very much appreciated.

    To trunk from a switch to a router the only way I have been able to do this is by creating a sub interface on the router and encapsulating it as DOT1Q.

    The router sub interface that connects to switch A has an IP address that switch A uses for its default gateway as part of its management address.

    The router interface that connects to switch B has 3 sub interfaces ie router on a stick and again has IP addresses that hosts off swicth B use as their default gateway.

    Do VTP messages only travel on layer 2 and if so is there not away of keeping my above config but allowing messages to traverse the router.

  • jason_lundejason_lunde Member Posts: 567
    Sorry, read too fast and didnt see the router portion in the middle. Follow ed's advice and create a bridge group. Read this article by scott morris (i.e. networking god).
    TCPmag.com | Q and A: Configuring VTP Domains and Proxy ARP
    Yes VTP = L2 and uses a dest. mac of 01-00-0C-CC-CC-CC and any devices participating in a VTP topology should share a common L2 broadcast domain.
  • mobrmobr Member Posts: 3 ■□□□□□□□□□
    Cheers Jason,

    I'm checking that link now

    And thanks to both of you for taking the time to help those of us that are less advanced in the networking game.


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