From: Price, Jamie (jprice@xxxxxxxxxxx)
Date: Thu Feb 24 2000 - 11:42:54 GMT-3
Title: Pretty simple BGP question
Hi,
I'm just looking for some clarification on my interpretation of the
difference between BGP summarization and aggregation.
The way I see it summarization is used to summarize the advertisement
of routes from one router in an AS. Two prerequisites must be met -
the summarized network needs to be advertised under the BGP process
and summarized prefix must exist in the routers IP routing table so
that the prefix of that summarization is installed into the BGP
routing table. ie the router advertising routes out of the AS can
summarize those routes if the prerequisites are met (and of course if
summarization is possible for that range of prefixes).
Aggregation on the other hand is used to aggregate routes that already
appear in the BGP routing table ie a router that recieves routes from
other AS's can then aggregate those routes for advertisement into its
own AS and beyond.
Am I right with this???
Thanks in advance
Jamie
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