Cisco NCS 5500 Series Configuration Manual page 36

BGP Maximum Prefix
SUMMARY STEPS
1. configure
2. router bgp as-number
3. neighbor ip-address
4. address-family { ipv4 | ipv6 } unicast
5. maximum-prefix maximum discard-extra-paths
6. commit
DETAILED STEPS
Step 1
configure
Example:
RP/0/RP0/CPU0:router# configure
Enters XR Config mode.
Step 2 router bgp as-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 10
Specifies the autonomous system number and enters the BGP configuration mode, allowing you to configure the BGP
routing process.
Step 3
neighbor ip-address
Example:
RP/0/RP0/CPU0:router(config-bgp)# neighbor 10.0.0.1
Places the router in neighbor configuration mode for BGP routing and configures the neighbor IP address as a BGP peer.
Step 4 address-family { ipv4 | ipv6 } unicast
Example:
RP/0/RP0/CPU0:router(config-bgp-nbr)# address-family ipv4 unicast
Specifies either the IPv4 or IPv6 address family and enters address family configuration submode.
Step 5 maximum-prefix maximum discard-extra-paths
Example:
RP/0/RP0/CPU0:router(config-bgp-nbr-af)# maximum-prefix 1000 discard-extra-paths
Configures a limit to the number of prefixes allowed.
Configures discard extra paths to discard extra paths when the maximum prefix limit is exceeded.
Step 6 commit
The following example shows how to configure discard extra paths feature for the IPv4 address family:
RP/0/RSP0/CPU0:router# configure
RP/0/RSP0/CPU0:router(config)# router bgp 10
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
26
Implementing BGP