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...like I said.<br />
<br />
/Kvistofta<br />

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To confirm that I understand correctly.<br />
<br />
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? 
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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?

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I see that the Cisco ASA 5505 does not support spanning tree.<br />
<br />
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.
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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.

Does Cisco ASA 5520 support spanning tree

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.