Does Cisco ASA 5520 support spanning tree

I see that the Cisco ASA 5505 does not support spanning tree.

I plan to configure a Cisco ASA 5520 in transparent mode. Does this device support spanning tree? If so, does the device support rapid spanning tree? Please provide documentation if possible.
c-h-r-i-s-t-o-p-hAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jimmy Larsson, CISSP, CEHNetwork and Security consultantCommented:
Hello

The ASA in transparent mode does not participate in spanning tree. However it is transparent to STP and will forward BPDU:s which means that your current STP-topology will be totally unaware of the ASA.

/Kvistofta
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Ken BooneNetwork ConsultantCommented:
Here is a link that states this:

http://www.cisco.com/en/US/docs/security/asa/asa70/hw/eal4/asaeal4.html#wp86061


STP and Transparent Mode

Spanning tree protocol (STP) is passed through the firewall by default in transparent mode. This default operation of the product can be mitigated by creating an access list to block the traffic.

hostname(config)# access-list layer2 ethertype deny bpdu

It does not participate in stp but simply passes through.
0
Jimmy Larsson, CISSP, CEHNetwork and Security consultantCommented:
...like I said.

/Kvistofta
0
c-h-r-i-s-t-o-p-hAuthor Commented:
To confirm that I understand correctly.

If I plug two devices that participate in spanningtree into the transparent asa and produce a loop, then the spanning tree devices will treat the transparent asa as part of the physical link and handle stp blocking on their end?
0
Ken BooneNetwork ConsultantCommented:
yes
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Cisco

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.