Single ASA with dual down-links

[Namal Suranga]

I have to connect an ASA with 2 core switches in network as above shows. so i need to configure one interface as an active and other one is backup.

core switches are configured with HSRP. During any failure with primary link(1000M)  need to LAN traffic passthrough backup link (100M). Please some one help me to reach this. I can't configure any VLAN interface in ASA , it doesn't allow.....

[Jennifer Halim]

You can't configure a single ASA to 2 core switches because ASA is like router where interfaces are routed interface. You can configure 2 ASA with each ASA connects to each core switch. But not a single ASA to 2 core switches.

[Namal Suranga]

Thank you very much.

[Karsten Iwen · Accepted solution]

I think the redundant interfaces should also work when connected to two different switches:

http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/interface_start.html#wp1329357

Edit: I just see that your interfaces have different speeds. Not sure if that works as both member-interfaces of the redundant interface have to be of the same physical type.

[Jennifer Halim]

Karsten is right, you can configure redundant interfaces. I completely have forgotten about this option.