Hi, I have a design where I am trying to decide if it would be better to run EIGRP vs iBGP on a crosslink connection for failover purposes. Attached is a diagram
- R3 and R4 are internal distribution Switches that connect via EIGRP and are dual homed to the internal Core Switches (The core is depicted as internal network. There are 2 core boxes Core 1 and Core 2 not shown on the diagram)
- R3 and R4 are also connected to each other via Cross-Over cable and are running iBGP between them.
1. I am considering running EIGRP between them because per my understanding if R3 which is the Primary Switch loses its connection to both the Core’s than it won’t have any routes to get back to the Core’s via R4 because I am not redistributing EIGRP into BGP since its not required. I could put a network statement in BGP but I am thinking this might not scale well if there are a lot of routes that are not summarizable. I could use static routes but would rather avoid them. Can anyone provide any thoughts on this setup?
2. In addition I am also considering if I should remove iBGP as well between R3 and R4 if I go with running EIGRP between them. I can’t see the benefit of running iBGP between R3 and R4 if I have another IGP running between these devices. All iBGP will be doing is advertising the routes, that R3 receives via eBGP from R1, to R4 and the same for R2 and R4.
Thx for your help.