5 months ago I was trying to implementent manual summarization on our hub-and-spoke eigrp network, but we had lots of troubles (inestability and convergence troubles). I suppose that my posts explaining the problem are still in the archives so I'm not going to repeat them here. I only want to say that we had inestability because we used an expect script for changing the configuration on all hub routers (think about this, we added the ip summary-addres eigrp 1 172.25.0.0 to 100 interfaces at the same time, I think this was too much for eigrp) Well, only two advices if someone is going to implement manual summarization on a hub-and-spoke eigrp network: 1.- You should do it step-by-step (no scripts) first change the configuration of one interface and then check that all is working fine. 2.- You should use the command eigrp stub connected in spoke routers, it's very important if you don't want to see a lot of SIAs wandering around your network. Regards, David.
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