Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

ATOMIC_AGGREGATE vs AGGREGATOR

What is the difference between ATOMIC_AGGREGATE and AGGREGATOR in BGP ( Attribute) , Both seems to serve the same purpose i.e adds the Aggregator ID during Aggregation.

2 REPLIES

Re: ATOMIC_AGGREGATE vs AGGREGATOR

Dear,

-Atomic aggregation used to inform the neighbor that the originated router aggregated routes

-Aggregator attribute specify the IP & ASN of the router that does

For more information chack:

http://www.cisco.com/warp/public/459/aggregation.html

Best Reagrds,

Mounir Mohamed

New Member

Atomic aggregate is a Well

Atomic aggregate is a Well-known discretionary attribute; it must be recognized by all BGP implementations and does not have to exist in all BGP updates.

The purpose of the attribute is to alert BGP speakers along the path that some information have been lost due to the route aggregation process and that the aggregate path might not be the best path to the destination.

When some routes are aggregated by an aggregator, the aggregator does attache its Router-ID to the aggregated route into the AGGREGATOR_ID attribute and it sets the ATOMIC_AGGREGATE attribute or not; based on whether the AS_PATH information of the aggregated routes were preserved or not.

4870
Views
5
Helpful
2
Replies
CreatePlease to create content