EIGRP with over 1000 neighbors using Metro Ethernet

[CSCO10408957]

EIGRP seems no limitation. No documentation about using EIGRP with what kind router can build a large network using Metro Ethernet. Cisco7600 will turn unstable after applying over 600 eigrp neighbors.

[jackyoung]

It normally depends on the memory size. I didn't try to use EIGRP as many as 600 routes at 7600. Can you share how it react if it is unstable ? High CPU loading ?

Moreover, did you try to summarize the routes ?

[CSCO10408957]

I found the problem.

Memory is enough. EIGRP may be no problem.

CPU is 99% always to make EIGRP neighbors restart.

The Question is IOS bugs or C7606 CPU limit.

However, I use 2811 to run 300 eigrp neighbors and

work well. Just the convergence time longer when restart the link, about 5mins.

[jackyoung]

Thanks for your update and it is good (or bad) to find it is a bug. Will it be fixed by upgrade the IOS ?

[CSCO10408957]

I am using the latest IOS to test it.

So... future i dunno...

[CSCO10408957]

jackyoung

Do you have a email address?

I think we can share our experience.

[jackyoung]

IC, you better raise a TAC case and wait for the update from Cisco / partner if there is an upate.

You can reach me at jackyoung@hotmail.com.

[CSCO10408957]

Done and wait.