Cisco NCS 6000 Series Configuration Manual page 87

Implementing BGP
If it does, all route reflectors in the cluster must be configured with the same 4-byte cluster ID so that a route
reflector can recognize updates from route reflectors in the same cluster. The bgp cluster-id command is used
to configure the cluster ID when the cluster has more than one route reflector.
SUMMARY STEPS
1. configure
2. router bgp as-number
3. bgp cluster-id cluster-id
4. neighbor ip-address
5. remote-as as-number
6. address-family { ipv4 | ipv6 } unicast
7. route-reflector-client
8. commit
DETAILED STEPS
Command or Action
Step 1
configure
Step 2
router bgp as-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
Step 3 bgp cluster-id cluster-id
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp cluster-id
192.168.70.1
Step 4 neighbor ip-address
Example:
RP/0/RP0/CPU0:router(config-bgp)# neighbor
172.168.40.24
Step 5
remote-as as-number
Example:
RP/0/RP0/CPU0:router(config-bgp-nbr)# remote-as
2003
Step 6 address-family { ipv4 | ipv6 } unicast
Example:
RP/0/RP0/CPU0:router(config-nbr)# address-family
ipv4 unicast
Purpose
Specifies the autonomous system number and enters the
BGP configuration mode, allowing you to configure the
BGP routing process.
Configures the local router as one of the route reflectors
serving the cluster. It is configured with a specified cluster
ID to identify the cluster.
Places the router in neighbor configuration mode for BGP
routing and configures the neighbor IP address as a BGP
peer.
Creates a neighbor and assigns a remote autonomous system
number to it.
Specifies either an IPv4 or IPv6 address family unicast and
enters address family configuration submode.
To see a list of all the possible keywords and arguments for
this command, use the CLI help (?).
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
Configuring a Route Reflector for BGP
65