Spanning Tree through a Transparent PIX

[andrew.goss]

Does a PIX in transparent mode break Spanning Tree communication between two switches ?

Is there an option to allow the layer two STP frames through a transparent PIX ?

[Jon Marshall · Accepted solution]

Hi Andrew

It will not let BPDU's through by default but you can allow them through with an ethertype access-list.

Attached is a link to v7.0 config for pix covering ethertype access-lists.

http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/traffic.html#wp1042206

HTH

Jon

[andrew.goss]

Thanks, that is just the info I was looking for.