Cisco NCS 540 Series User Manual

• Cancel - Remains in the configuration mode, without committing the configuration changes.
Configuring EBGP Routing to Exchange VPN Routes Between Subautonomous Systems in a
Confederation
Perform this task to configure external Border Gateway Protocol (eBGP) routing to exchange VPN routes
between subautonomous systems in a confederation.
To ensure that host routes for VPN-IPv4 eBGP neighbors are propagated (by means of the Interior Gateway
Protocol [IGP]) to other routers and PE routers, specify the redistribute connected command in the IGP
configuration portion of the confederation eBGP (CEBGP) router. If you are using Open Shortest Path First
(OSPF), make sure that the OSPF process is not enabled on the CEBGP interface in which the “redistribute
connected” subnet exists.
Note
Procedure
Step 1 configure
Example:
RP/0/RP0/CPU0:router# configure
Enters XR Config mode.
Step 2 router bgp autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
RP/0/RP0/CPU0:router(config-bgp)#
Enters BGP configuration mode allowing you to configure the BGP routing process.
Step 3 bgp confederation peers peer autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp confederation peers 8
Configures the peer autonomous system number that belongs to the confederation.
Step 4 bgp confederation identifier autonomous-system-number
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp confederation identifier 5
L3VPN Configuration Guide for Cisco NCS 540 Series Routers, IOS XR Release 6.3.x
39
MPLS L3VPN Overview
Configuring EBGP Routing to Exchange VPN Routes Between Subautonomous Systems in a Confederation

Cisco NCS 540 Series Specifications

General

Brand	Cisco
Model	NCS 540 Series
Category	Network Router
Language	English