Users Guide

Filter BGP route
OS10(config)# router bgp 102
OS10(conf-router-bgp-102)# neighbor 40.1.1.2
OS10(conf-router-neighbor)# address-family ipv4 unicast
OS10(conf-router-bgp-neighbor-af)# route-map metro in
OS10(conf-router-bgp-neighbor-af)# exit
OS10(conf-router-bgp-102)# template ebgp
OS10(conf-router-template)# address-family ipv4 unicast
OS10(conf-router-bgp-template-af)# route-map metro in
Route reflector clusters
BGP route reflectors are intended for ASs with a large mesh. They reduce the amount of BGP control traffic. With route
reflection configured properly, IBGP routers are not fully meshed within a cluster but all receive routing information.
Configure clusters of routers where one router is a concentration router and the others are clients who receive their updates
from the concentration router.
1. Assign an ID to a router reflector cluster in ROUTER-BGP mode. You can have multiple clusters in an AS.
cluster-id cluster-id
2. Assign a neighbor to the router reflector cluster in ROUTER-BGP mode.
neighbor {ip-address}
3. Configure the neighbor as a route-reflector client in ROUTER-NEIGHBOR mode, then return to ROUTER-BGP mode.
route-reflector-client
exit
4. Assign a peer group template as part of the route-reflector cluster in ROUTER-BGP mode.
template template-name
5. Configure the template as the route-reflector client in ROUTER-TEMPLATE mode.
route-reflector-client
When you enable a route reflector, the system automatically enables route reflection to all clients. To disable route reflection
between all clients in this reflector, use the no bgp client-to-client reflection command in ROUTER-BGP mode.
You must fully mesh all the clients before you disable route reflection.
Configure BGP route reflector
OS10(config)# router bgp 102
OS10(conf-router-bgp-102)# cluster-id 4294967295
OS10(conf-router-bgp-102)# neighbor 32.1.1.2
OS10(conf-router-neighbor)# route-reflector-client
OS10(conf-router-neighbor)# exit
OS10(conf-router-bgp-102)# template zanzibar
OS10(conf-router-template)# route-reflector-client
Aggregate routes
OS10 provides multiple ways to aggregate routes in the BGP routing table. At least one route of the aggregate must be in the
routing table for the configured aggregate route to become active. AS_SET includes AS_PATH and community information from
the routes that are included in the aggregated route.
1. Assign an AS number in CONFIGURATION mode.
router bgp as-number
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Layer 3