01-21-2019 09:50 PM
Hello folks,
I have few doubts about EIGRP Autosummary, I knew the concept of Auto Summary and how it works .
I read in Cisco Blog that disabling auto summary is a best practice always and auto-summary wont create routing issues if the internetwork has all contiguous classful networks. I have tried this in GNS3 using discontiguous network but it works for me .
So my query is if we are enabling auto suammry in eigrp , is that work on discontiguous network ???
Thanks & Regards,
nikhi
01-22-2019 12:59 AM
Perhaps you can provide details of the lab and what you did ?
Jon
01-22-2019 04:45 AM
nikhil4,
Can you please show the topology on which you have tried this. I have labbed it up a few times and always ran into issues when I had auto summary enabled and had discontiguous networks. The discontiguous network in its simlpest form would look something like that:
10.1.1.0/24 - 172.16.1.0/24 - 10.1.2.0/24.
Network in the middle would only receive 10.0.0.0/8 from right part of the network or left and only use one. So, routing between 10.1.1.0/24 and 10.1.2.0/24 would not work . Basically, one of the 10.1. networks would become isolated.
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