Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

dlsw bridge-group on dot1q trunk


I have configured bridge-group for dlsw on a Fastethernet dot1q encapsulated subinterface.

on the switch I have seen the remote mac-address learned in vlan 1 (untagged vlan of the trunk) and I have not seen that mac-address on vlan 3 as it was aspected.

here is the configuration:


interface FastEthernet0/0

no ip address

duplex auto

speed auto


interface FastEthernet0/0.2

description lan SERVIZIO

encapsulation dot1Q 2

ip address


interface FastEthernet0/0.3

description lan UFFICIO

encapsulation dot1Q 3

ip address

ip helper-address

bridge-group 1


dlsw local-peer peer-id

dlsw remote-peer 0 tcp

dlsw icannotreach sap F0

dlsw bridge-group 1


bridge 1 protocol ieee

  • Server Networking
New Member

Re: dlsw bridge-group on dot1q trunk

Hi Massimiliano,

Are you possibly using an older version of IOS? This was not supported until later versions (~13) of 12.2. Otherwise what you have looks OK.

Rgds, Dan

New Member

Re: dlsw bridge-group on dot1q trunk

Hi Dan,

thank you for your answer.

The problem was no longer seen changing the switch (a non-cisco switch was installed).

the ios is a 12.2-17a and it supports dlsw bridging on dot1q trunk.

thank you