Cisco NCS 5500 Series Configuration Manual page 71

Implementing BGP
SUMMARY STEPS
1. configure
2. router bgp as-number
3. vrf vrf-name
4. neighbor ip-address internal-vpn-client
5. commit
6. show bgp vrf vrf-name neighbors ip-address
7. show bgp {vpnv4|vpnv6 } unicast rd
DETAILED STEPS
Step 1 configure
Step 2 router bgp as-number
Example:
RP/0/RP0/CPU0:router(config)# router bgp 120
Specifies the autonomous system number and enters the BGP configuration mode, allowing you to configure the BGP
routing process.
Step 3
vrf vrf-name
Example:
RP/0/RP0/CPU0:router(config-bgp)# vrf blue
Configures a VRF instance.
Step 4
neighbor ip-address internal-vpn-client
Example:
RP/0/RP0/CPU0:router(config-bgp-vrf)# neighbor 10.0.0.0
Configures a CE neighboring device with which to exchange routing information. The neighbor internal-vpn-client
command stacks the iBGP-CE neighbor path in the VPN attribute set.
Step 5
commit
Step 6
show bgp vrf vrf-name neighbors ip-address
Displays whether the iBGP PE-CE feature is enabled for the VRF CE peer, or not.
Step 7
show bgp {vpnv4|vpnv6 } unicast rd
Displays the ATTR_SET attributes in the command output when the L3VPN iBGP PE-CE is enabled on a CE.
Example: Configuring L3VPN iBGP PE-CE
The following example shows how to configure L3VPN iBGP PE-CE:
R1(config-bgp-vrf-nbr)#neighbor 10.10.10.1 ?
. . .
internal-vpn-client
. . .
Preserve iBGP CE neighbor path in ATTR_SET across VPN core
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
internal-vpn-client
L3VPN iBGP PE-CE
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