Route Summarization Cisco - Tips and Tricks

When you summarize routes in RIP, IGRP, EIGRP, or OSPF, you are replacing a sequence of routes in a summary course and mask. With RIP, IGRP, and EIGRP, this moment in essence dimishes the size of the routing update packet itself – a good number of routes are replaced amidst the summary route. For instance, the routes 8.0.0.0/8, 9.0.0.0/8, 10.0.0.0/8, and 11.0.0.0/8 can be summarized as 8.0.0.0 252.0.0.0. Only the summary address serves to be at last found in the update packet, building it concise yet complete.

Summarizing routes can too construct the routing table smaller, yet even improve the ability of for comprehensive IP connectivity when done correctly. Using the above example, the one more-specific routes will be able to be replaced by a single summary route. Since the general routing table is parsed before the routing procedure is complete, keeping the routing table as efficient as expected performs help rapidity the routing procedure as a whole.

Here are Other further information on direction summarization.

With RIP version 2 and EIGRP, manual path summarization is configured on the interface overly ought to be advertising the summary. This is carried out amongst the direction summarization command "ip summary-address."

RIP version 2 and EIGRP too both perform autosummarization on routes the are advertised everywhere classful network boundaries. This is disabled amidst the protocol-level command "no auto-summary".

OSPF proposals two diverse path summarization commands. To summarize routes from what i read in one OSPF neighborhood to another, use the "area range" command to summarize routes learned via redistribution, use the "summary-address" command on the ASBR.