VTP domains across routers

cpetrina · ‎06-12-2002

Can a VTP domain be seen across a router with a switch on either side?

mfaust · ‎06-12-2002

VTP uses VLAN 1. If VLAN 1 can cross the router then VTP can cross.

nuno.morais · ‎06-17-2002

Hi.

Sorry but you are wrong. VTP is a layer 2 protocol which runs on VLAN 1 as you said, but VTP messages are sent to the address 01000ccccccc which is processed by switches and not by routers, unless the router is working as a bridge, which in that case will forward VTP frames across its interfaces. Routers, as layer 3 devices, break VTP domains as Jackson said. If you have a router between two switches you will need two separate VTP domains.

Rgds.

NM

mfaust · ‎06-17-2002

You are correct of course. I was thinking one thing and typing another.

jackson.a · ‎06-17-2002

VTP will ONLY communicate via trunk ports, so therefore you will have to setup 2 VTP domains if there is a router separating the two switches.