Connectivity Guide

2 Enter Address Family mode in ROUTER-NEIGHBOR mode.
address-family {[ipv4 | ipv6] [unicast]}
3 Create a route-map and assign a ltering criteria in ROUTER-BGP-NEIGHBOR-AF mode, then return to CONFIG-ROUTER-BGP
mode.
route-map map-name {in | out}
exit
• in—Enter a lter for incoming routing updates.
• out—Enter a lter for outgoing routing updates.
4 Enter a peer template name in ROUTER-BGP mode.
template template-name
5 Enter Address Family mode.
address-family {[ipv4 | ipv6] [unicast]}
6 Create a route-map, and assign a ltering criteria in ROUTER-BGP-TEMPLATE-AF mode.
route-map map-name {in | out}
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 reector clusters
BGP route reectors are intended for ASs with a large mesh. They reduce the amount of BGP control trac. With route reection
congured properly, IBGP routers are not fully meshed within a cluster but all receive routing information.
Congure 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 reector cluster in ROUTER-BGP mode. You can have multiple clusters in an AS.
cluster-id cluster-id
2 Assign a neighbor to the router reector cluster in ROUTER-BGP mode.
neighbor {ip-address}
3 Congure the neighbor as a route-reector 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-reector cluster in ROUTER-BGP mode.
template template-name
5 Congure the template as the route-reector client in ROUTER-TEMPLATE mode.
route-reflector-client
When you enable a route reector, the system automatically enables route reection to all clients. To disable route reection between all
clients in this reector, use the no bgp client-to-client reflection command in ROUTER-BGP mode. You must fully mesh all
the clients before you disable route reection.
Congure BGP route reector
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
Layer 3
455