Cisco ASR 9000 Series Routing Configuration Guide

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

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English