BVI interfaces on UC520

Unanswered Question
Jan 30th, 2008

While inspecting the config of our UC520 I see it makes extensive use of BVI interfaces and bridge-groups. I see that the 802.11 radio and VLAN1 interfaces are part of a bridge-group 1 with a BVI interface setup for them and that my Voice VLAN also has a bridge-group and BVI associated with it. What is the purpose of the bridge-group and BVI interfaces? Can the setup work with just "normal" interfaces and VLANs? What would happen if I rip out all the bridge stuff?



I have this problem too.
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Paolo Bevilacqua Thu, 01/31/2008 - 02:38

The radio interface does not support routing. So you must use it in bridging with a BVI, else it won't work.

Hope this helps, please rate post if it does!

DIEGO ALONSO Thu, 01/31/2008 - 05:23

That explains the radio but why setup a BVI for the ethernet also? Won't a VLANx interface be enough for that?



Paolo Bevilacqua Thu, 01/31/2008 - 05:54

VLAN interfaces controls the switched ports like the UC-520 and other models have. So if you want your wireless devices to be in the same subnet of ethernet, you bridge them together under a common subnet defined via BVI.


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