Cisco ASR 9000 Series

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
. . .
R1(config-bgp-vrf-nbr)#neighbor 10.10.10.1 internal-vpn-client
router bgp 65001
bgp router-id 100.100.100.2
address-family ipv4 unicast
address-family vpnv4 unicast
!
vrf ce-ibgp
rd 65001:100
address-family ipv4 unicast
!
neighbor 10.10.10.1
remote-as 65001
internal-vpn-client
The following is an example of the output of the show bgp vrf vrf-name neighbors ip-address command
when the L3VPN iBGP PE-CE is enabled on a CE peer:
R1#show bgp vrf ce-ibgp neighbors 10.10.10.1
BGP neighbor is 10.10.10.1, vrf ce-ibgp
Remote AS 65001, local AS 65001, internal link
Remote router ID 100.100.100.1
BGP state = Established, up for 00:00:19
. . .
Multi-protocol capability received
Neighbor capabilities:
Route refresh: advertised (old + new) and received (old + new)
4-byte AS: advertised and received
Address family IPv4 Unicast: advertised and received
CE attributes will be preserved across the core
Received 2 messages, 0 notifications, 0 in queue
Sent 2 messages, 0 notifications, 0 in queue
. . .
The following is an example of the output of the show bgp vpn4/vpn6 unicast rd command when the L3VPN
iBGP PE-CE is enabled on a CE peer:
BGP routing table entry for 1.1.1.0/24, Route Distinguisher: 200:300
Versions:
Process bRIB/RIB SendTblVer
Speaker 10 10
Last Modified: Aug 28 13:11:17.000 for 00:01:00
Paths: (1 available, best #1)
Advertised to update-groups (with more than one peer):
0.2
Path #1: Received by speaker 0
Advertised to update-groups (with more than one peer):
0.2
Local, (Received from a RR-client)
20.20.20.2 from 20.20.20.2 (100.100.100.2)
Received Label 24000
Origin IGP, localpref 100, valid, internal, best, group-best, import-candidate,
not-in-vrf Received Path ID 0, Local Path ID 1, version 10
Extended community: RT:228:237
ATTR-SET [
Origin-AS: 200
AS-Path: 51320 52325 59744 12947 21969 50346 18204 36304 41213 23906 33646
Origin: incomplete
Metric: 204
Local-Pref: 234
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
134
Implementing BGP
L3VPN iBGP PE-CE