Trunk between two Switches

[vidarellingsen]

I have 2 3750 switches and I want to form a dot1q trunk between them. That part is easy, but what Im wonderig is that can I rewrite the vlanid from one switch to another? VLAN33 on 3750-1 I want to be VLAN100 on 3750-2. Is that possible?

Regards,

Vidar

[vidarellingsen]

Kevin,

do you have an example of vlan-bridging between two vlans?

Vidar.

[Kevin Dorrell]

This posting was a while ago, so I'll have to invent the config on the fly. But the outline is like this.

On your switches, either have two access ports, one on each VLAN, connecting to different ports on a router, or have a trunk port carrying two VLANs. I shall choose the latter. Then on the router you do something like this:

bridge 1 protocol vlan-bridge

int f0/0.33

encapsulation dot1q 33

bridge-group 1

int f0/0.100

encapsulation dot1q 100

bridge-group 1

I think that should join the spanning-trees of VLANs 33 and 100 into a single spanning-tree. There will be only one root serving both VLANs.

Kevin Dorrell

Luxembourg

[Edison Ortiz]

Kevin,

Good job. I have to try this out. I believe the key here is bpdufilter.

Thanks.