How many EIGRP neighbors that IOS can support?
We are trying to build a 1500 nodes network and not sure if EIGRP can have that many neighbors or not. 99% of the remote sites will be stub.
It was in presentation RST-2330 EIGRP Deployment in Large-Scale Networks at Networkers 2007. Distribution of these presentations is limited. If you attended Networkers 2007 then attendance includes a subscription to the presentations, or there is a paid subscription that Cisco offers. Or if you have a Cisco SE for your account they might be able to get the material.
Some of the things from the presentation that bear on your situation:
- they cite the largest number of EIGRP neighbors seen deployed in a live network was 800.
- they have tested the number of EIGRP neighbors up to 1800 in a lab environment.
- in a test with 1500 remotes dual homed, peering to NPE-G1 with 1G RAM at the head end it took 9 minutes to bring up/converge the network.