Company C has servers on my network(company B). Users on company A network access these servers via company C the red link.
B has a link to A as I need to access servers on A's 172.16.115.0. I redistribute 172.16.115.0 network in to our EIGRP.
Company C uses my link from B to A (blue) as a backup to reach network 172.16.48.0. I have created static routes with an AD of 200 to network 172.16.48.0 pointing to A. As these have a higher AD than the other static route which point to C these are not entered in to the routing table. The problem I have is I have no idea if the etherflow link from C to A fails so there is no automatic failover for C to use my link to A.I have to use a manual process and remove the routes for network 172.16.48.0 which point to C.
Myself (B) and C use EIGRP AS 100. our networks don't share routing information due to the passive-interface command.
My question is what would be the best way to achieve autmamtic failover should C's link to A fails. I know we could share complete EIGRP information but I don't want to know all of their routes. Someone has suggested using a new EIGRP AS (110) which will work around the existing AS (100) but I'm not sure this will work.
Please could someone advise on a prefered method.