ASA and Spanning-tree

Answered Question
Mar 11th, 2009

All,

I have an ASA that is connected to my 3750 stack. I don't see any bpdu's being received on that port. Is it okay for me to enable portfast on this port? Should I enabled bpdu root guard if I do?

Thanks,

John

I have this problem too.
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Correct Answer by adamclarkuk_2 about 7 years 10 months ago

Yes you can enable portfast on the interface facing the ASA but it's always a good idea to have at least root guard enabled as the ASA does not support spanning tree.

In router mode BPDU's will not pass anyway as it's Layer 3, in transparent mode BPDU's will pass.

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Correct Answer
adamclarkuk_2 Wed, 03/11/2009 - 08:02

Yes you can enable portfast on the interface facing the ASA but it's always a good idea to have at least root guard enabled as the ASA does not support spanning tree.

In router mode BPDU's will not pass anyway as it's Layer 3, in transparent mode BPDU's will pass.

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