Configuring Bgp As A Pe-Ce Protocol - Cisco ASR 9000 Series Configuration Manual

Implementing BGP
Command or Action
Step 2
router bgp as-number
Example:
RP/0/RSP0/CPU0:router(config)# router bgp
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Step 3
address-family vpnv4 unicast
Example:
RP/0/RSP0/CPU0:router(config-bgp)#
address-family vpvn4 unicast
Step 4 retain route-target { all | route-policy
route-policy-name }
Example:
RP/0/RSP0/CPU0:router(config-bgp-af)# retain
route-target route-policy rr_ext-comm
Step 5 commit

Configuring BGP as a PE-CE Protocol

Perform this task to configure BGP on the PE and establish PE-CE communication using BGP. This task can
be performed in both VRF and non-VRF configuration.
OL-30423-03
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
Configuring a VPN Routing and Forwarding Instance in BGP
Purpose
Specifies the autonomous system number and enters the BGP
configuration mode, allowing you to configure the BGP routing
process.
Enters VPN address family configuration mode.
Configures a reflector to retain routes tagged with particular
RTs. Use the route-policy-name argument for the policy name
that lists the extended communities that a path should have in
order for the RR to retain that path.
Note The all keyword is not required, because this is the
default behavior of a route reflector.
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