At present I have a network consisting of Edge routers C and D being connected to the Internet via Routers A and B
the default route for users attached to Router C is via Router A and the default route for users attached to Router D is via Router B
The EIGRP ensures their is always a default route available if a primary connection fails.
It has now been decided to host services outside the Corporate zone, but using the Corporate address space on Router E. Our service provider
has agreed to install static routes on Router A and Router B pointing to 172.16.48.0/22 so the outside world is properly directed,
My problem is that I want 172.16.48.0/22 to be part of EIGRP 1 and appear in the routing tables so it can be redistributed into EIGRP 2
but if the primary connection between Router C and Router A fails I still want 172.16.48.0/22 to be visible to users in EIGRP 2 area
I have included a drawing Layout1.pdf
what are my options ?
with thanks G
Multiple eigrp AS is not recommended. Because multiple eigrp AS will require mutual redistribution and that can cause potential loop. Besides, using multiple AS cannot stop query anyway. A single EIGRP AS with summarization is the best practice.
With proper configuration, GRE should work as well. However GRE usually add some other problem because of the MTU or high CPU, so I would not use GRE if there is other solution.