BGP: Difference between revisions
→Route Aggregation
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= Route Aggregation =
Source [https://www.noction.com/knowledge-base/bgp-route-aggregation noction.com]
RA also known as BGP Route Summarization
A method to minimize the size of the routing table
Announcing the whole address block received from the Regional Internet Registry (RIR) to other ASes.
RA is opposite to non-aggregation routing, where individual sub-prefixes of the address block are announced to BGP peers.
RA reduces the size of the global routing table, decreases routers’ workload and saves network bandwidth.
*BGP Route Aggregation with Static Discard Route:
router bgp 3695
bgp log-neighbor-changes
network 70.36.0.0 mask 255.255.240.0
neighbor 12.0.0.2 remote-as 11260
!
ip route 70.36.0.0 255.255.240.0 Null0
*BGP Route Aggregation with Aggregate-address Command
router bgp 3695
bgp log-neighbor-changes
network 70.36.0.0 mask 255.255.255.0
aggregate-address 70.36.0.0 255.255.240.0
neighbor 12.0.0.2 remote-as 11260
*Option summary-only
*Option suppress-map
*Option unsuppress-map
*Option attribute-map
*Option advertise-map
*Option as-set
= Routing Information Base (RIB) =
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