12-02-2014 09:29 AM - edited 03-05-2019 12:16 AM
what are the difference between command
1) auto-summary
2) for ex : ip summary address eigrp 1 90.0.0.0 255.255.0.0
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12-02-2014 11:27 AM
We could consider auto-summary for classful but IP Summary for summarizing prefixes going out of an interface to the nearest supernet (VLSM)
Cheers!
Sumit
12-02-2014 10:06 AM
EIGRP auto summarization applies to the entire EIGRP process. The ip summary-address command let's you manually summarize that network only out of the applied interface. You could have a network out that interface that could be summarized but other routes in other places that can't be summarized.
So if you have some networks like 10.0.0.0/24 10.0.1.0/24 10.0.2.0/24 10.0.3.0/24,then auto-summary will advertise 10.0.0.0/8 to the neighbors ,,however io summary address eigrp 10.0.0.0 255.255.252.0 will summarize the 4 prefixes into one.and the EIGRP neighbor will have 10.0.0.0/22 in its topology table.
Hope it helps.
12-02-2014 10:17 AM
thanks for your help :)
so the auto-summary for classful and the ip summary used for vlsm is that right
12-02-2014 11:27 AM
We could consider auto-summary for classful but IP Summary for summarizing prefixes going out of an interface to the nearest supernet (VLSM)
Cheers!
Sumit
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