Connectivity Guide

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
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 congured aggregate route to become active. AS_SET includes AS_PATH and community information from the routes included in
the aggregated route.
1 Assign an AS number in CONFIGURATION mode.
router bgp as-number
2 Enter Address Family mode in ROUTER-BGP mode.
address-family {[ipv4 | ipv6] [unicast]}
3 Aggregate address in ROUTER-BGPv4-AF mode.
aggregate-address ip-address/mask
Congure aggregate routes
OS10(config)# router bgp 105
OS10(conf-router-bgp-105)# address-family ipv4 unicast
OS10(conf-router-bgpv4-af)# aggregate-address 3.3.0.0/16
View running conguration
OS10(conf-router-bgpv4-af)# do show running-configuration bgp
! Version
! Last configuration change at Jul 27 06:51:17 2016
!
!
router bgp 105
!
address-family ipv4 unicast
aggregate-address 3.3.0.0/16
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Layer 3