Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
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)

Transparent ASA in middle of 802.1q trunk

Hi Everyone,

I am hoping someone can provide some advice regarding an ASA in transparent mode sitting in the middle of a .1q trunk.

Scenario is two switches (one routing) has multiple VLAN's setup and then a trunk down to a L2 switch which then has all the end user devices hanging off it. We have a requirement to put an ASA in the middle in transparent mode (and also do IPS) but I cannot for the life of me seem to find a configuration that supports this method.

Any advice/pointers/hints/anything would be most appreciated.

2 REPLIES

Re: Transparent ASA in middle of 802.1q trunk

In theory - this is possible, as long as the ASA supports trunks (Not the 5505 without security plus license)

Gold

Re: Transparent ASA in middle of 802.1q trunk

You can't configure more than 2 interfaces (or subinterfaces) in transparent mode - ie, no trunking.

If you're looking to control traffic between subnets/vlans you will have to place your ASA differently and possibly do some minor network reconfiguration.

771
Views
0
Helpful
2
Replies
CreatePlease to create content