Cisco ASR 9000 Series Routing Configuration Manual page 192

Installing Primary Backup Path for Prefix Independent Convergence (PIC)
SUMMARY STEPS
1. configure
2. router bgp as-number
3. Do one of the following
4. additional-paths selection route-policy route-policy-name
5. commit
DETAILED STEPS
Command or Action
Step 1 configure
Step 2 router bgp as-number
Example:
RP/0/RSP0/CPU0:router(config)# router bgp
100
Step 3 Do one of the following
• address-family {vpnv4 unicast | vpnv6
unicast}
• vrf vrf-name {ipv4 unicast | ipv6 unicast}
Example:
RP/0/RSP0/CPU0:router(config-bgp)#
address-family vpnv4 unicast
Step 4 additional-paths selection route-policy
route-policy-name
Example:
RP/0/RSP0/CPU0:router(config-bgp-af)#
additional-paths selection route-policy
ap1
Step 5 commit
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
162
• address-family {vpnv4 unicast | vpnv6 unicast}
• vrf vrf-name {ipv4 unicast | ipv6 unicast}
Purpose
Specifies the autonomous system number and enters the BGP
configuration mode, allowing you to configure the BGP routing
process.
Specifies the address family or VRF address family and enters the
address family or VRF address family configuration submode.
Configures additional paths selection mode for a prefix.
Use the additional-paths selection command with an
Note
appropriate route-policy to calculate backup paths and to
enable Prefix Independent Convergence (PIC)
functionality.
The route-policy configuration is a pre-requisite for configuring the
additional-paths selection mode for a prefix . This is an example
route-policy configuration to use with additional-selection command:
route-policy ap1
set path-selection backup 1 install
end-policy
Implementing BGP