With a 6509, can the MSFC be behind two firewalls (security contexts on the FWSM) with the firewalls running in transparent mode?? I wanted to do it this way so that the 6509 and a specific WAN router can exchange EIGRP udpates.
Yes you can have an MSFC (SVI's) interfaces for inside interfaces as opposed to outside. Make sure you are truking the outside interface to the external router correctly. Also, use a protocol accesslist to permit routing packets
Thanks for the response. Just to be clear, I will have the MSFC on the INSIDE interfaces of the firewall. I want to make sure because your response says to trunk the outside interface to the external router. That makes me think the outside interface of the firewall to the MSFC which is not my situation.
Again to be clear, the MSFC will be behind two firewalls (on the firewalls inside interfaces) in transparent mode. If this is doable, I'm assuming EIGRP will pass through with the appropriate ACLs??