Cisco ASR 9000 Series Configuration Guide

SUMMARY STEPS
1.
configure
2.
router bgp as-number
3.
bgp confederation identifier as-number
4.
bgp confederation peers as-number
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# router bgp 120
Step 2
Specifies a BGP confederation identifier.
bgp confederation identifier as-number
Example:
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
identifier 5
Step 3
Specifies that the BGP autonomous systems belong
to a specified BGP confederation identifier. You
bgp confederation peers as-number
Example:
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
Step 4
can associate multiple AS numbers to the same
confederation identifier, as shown in the example.
peers 1091
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
peers 1092
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
peers 1093
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
peers 1094
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
peers 1095
RP/0/RSP0/CPU0:router(config-bgp)# bgp confederation
peers 1096
commit
Step 5
Resetting an eBGP Session Immediately Upon Link Failure
By default, if a link goes down, all BGP sessions of any directly adjacent external peers are immediately reset.
Use the bgp fast-external-fallover disable command to disable automatic resetting. Turn the automatic reset
back on using the no bgp fast-external-fallover disable command.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 79
Implementing BGP
Resetting an eBGP Session Immediately Upon Link Failure

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model