Posted on 2016-08-04
I have an old Cisco 3825 router that I am replacing with ASA 5525x Firepower IPS and ISR 4431 router. My old router has 2 outside interfaces (handoffs) that bandwidth comes in from COLO and 1 interface that is a cross connect to my circuits. The old router is running the following roles/protocols: VPN (few different flavors dynamic and isakmp client), BGP, DHCP for voip/users, with some extended access lists. The question is, do I use 2 outside IPs that were previously on my router outside interfaces on the 2 outside ASA interfaces since it will be in front of the router facing the handoffs, then use the inside interfaces to connect to 2 router internal IPs interfaces?