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Step-by-Step Configuration and Troubleshooting Best Practices for the NGFW, NGIPS and AMP Technologies A Visual Guide to the Cisco Firepower Threat Defense (FTD)
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Spanning Tree through a Transparent PIX

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 ?

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Hall of Fame Super Blue

Re: Spanning Tree through a Transparent PIX

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

2 REPLIES
Hall of Fame Super Blue

Re: Spanning Tree through a Transparent PIX

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

New Member

Re: Spanning Tree through a Transparent PIX

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

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