concept of peer group has been replaced by a set of configuration groups to be used as templates in BGP
configuration and automatically generated update groups to share update messages between neighbors.
Configuration Modes
BGP configurations are grouped into modes. The following sections show how to enter some of the BGP
configuration modes. From a mode, you can enter the ? command to display the commands available in that
mode.
Router Configuration Mode
The following example shows how to enter router configuration mode:
RP/0/RSP0/CPU0:router# configuration
RP/0/RSP0/CPU0:router(config)# router bgp 140
RP/0/RSP0/CPU0:router(config-bgp)#
Router Address Family Configuration Mode
The following example shows how to enter router address family configuration mode:
RP/0/RSP0/CPU0:router(config)# router bgp 112
RP/0/RSP0/CPU0:router(config-bgp)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-af)#
Neighbor Configuration Mode
The following example shows how to enter neighbor configuration mode:
RP/0/RSP0/CPU0:router(config)# router bgp 140
RP/0/RSP0/CPU0:router(config-bgp)# neighbor 10.0.0.1
RP/0/RSP0/CPU0:router(config-bgp-nbr)#
Neighbor Address Family Configuration Mode
The following example shows how to enter neighbor address family configuration mode:
RP/0/RSP0/CPU0:router(config)# router bgp 112
RP/0/RSP0/CPU0:router(config-bgp)# neighbor 10.0.0.1
RP/0/RSP0/CPU0:router(config-bgp-nbr)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-nbr-af)#
VRF Configuration Mode
The following example shows how to enter VPN routing and forwarding (VRF) configuration mode:
RP/0/RSP0/CPU0:router(config)# router bgp 140
RP/0/RSP0/CPU0:router(config-bgp)# vrf vrf_A
RP/0/RSP0/CPU0:router(config-bgp-vrf)#
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
14
Implementing BGP
BGP Configuration
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