For an L3VPN environment, the PE
router uses MP-BGP to advertise VPNv4-NLRI to a remote PE router.
This post demonstrates how to configure MP-BGP on Cisco,
Juniper and Nokia (Alcatel-Lucent) routers.
Cisco MP-BGP Configuration:
router bgp 100
address-family vpnv4
neighbor
100.64.0.102 activate
neighbor
100.64.0.102 send-community extended
neighbor
100.64.0.3 activate
neighbor
100.64.0.3 send-community extended
Verification:
Verify MBGP session with below Cisco command:
Cisco-RTR
#show bgp vpnv4 unicast all summary | include
100.64.0.102
100.64.0.102 4 100
84736 71225 415128
0 0 2w3d 8680
Cisco-RTR#show bgp vpnv4
unicast all summary | include 100.64.0.3
100.64.0.3 4 100
173961 18620 415128
0 0 4d20h 4
MP-BGP Configuration on Juniper:
set protocols
bgp group vpls-family type
internal
set protocols
bgp group L3-VPN neighbor
100.64.0.6 local-address 100.64.0.3
set protocols
bgp group L3-VPN neighbor
100.64.0.6 family inet-vpn unicast
Verification:
JPR-RTR>
show bgp neighbor
100.64.0.6
Peer:
100.64.0.6+26559 AS 100 Local: 100.64.0.3+179 AS 100
Group: L3-VPN Routing-Instance: master
Forwarding routing-instance: master
Type: Internal State: Established Flags: <Sync RSync>
Last State: EstabSync Last Event: RecvKeepAlive
Last Error: Open Message Error
Options: <Preference LocalAddress
LogUpDown AddressFamily
Rib-group Refresh>
Address families configured: inet-unicast inet-vpn-unicast
Local Address: 100.64.0.3 Holdtime:
90 Preference: 170
Number of flaps: 3
Last flap event: RecvNotify
Error: 'Open Message Error' Sent: 1 Recv: 0
Error: 'Hold Timer Expired Error' Sent: 0 Recv: 3
Peer ID: 100.64.0.6 Local ID: 100.64.0.3 Active Holdtime:
90
Keepalive Interval:
30 Group index: 18 Peer index: 1
BFD: disabled, down
NLRI for restart configured on peer: inet-unicast inet-vpn-unicast
NLRI advertised by peer: inet-unicast
inet-vpn-unicast
NLRI for this session: inet-unicast
inet-vpn-unicast
Peer supports Refresh capability (2)
Stale routes from peer are kept for: 300
Peer does not support Restarter functionality
Peer does not support Receiver functionality
Peer does not support LLGR Restarter or
Receiver functionality
Peer does not support 4 byte AS extension
Peer does not support Addpath
Table inet.0 Bit: 10000
RIB State: BGP restart is complete
Send state: in sync
Active prefixes: 132
Received prefixes: 151
Accepted prefixes: 149
Suppressed due to damping: 0
Advertised prefixes: 1
Table bgp.l3vpn.0
RIB State: BGP restart is complete
RIB State: VPN restart is complete
Send state: not advertising
Active prefixes: 27
Received prefixes: 27
Accepted prefixes: 27
Suppressed due to damping: 0
MP-BGP Configuration on Alcatel SR
routers:
ALU-RTR#
configure router bgp
ALU-RTR>config>router>bgp# info
group
"L3-VPN"
family
vpn-ipv4
type
internal
neighbor 100.64.0.6
exit
Verification:
ALU-RTR# show router bgp summary
===============================================================================
BGP Router ID:100.64.0.102 AS:100 Local AS:100
===============================================================================
BGP Admin
State : Up BGP Oper
State : Up
Total Peer
Groups : 3 Total Peers : 4
Total BGP
Paths : 516 Total Path Memory : 129436
Total IPv4
Remote Rts :
263 Total IPv4 Rem. Active Rts : 132
Total
McIPv4 Remote Rts : 0 Total
McIPv4 Rem. Active Rts: 0
Total
McIPv6 Remote Rts : 0 Total
McIPv6 Rem. Active Rts: 0
Total IPv6
Remote Rts :
0 Total IPv6 Rem. Active Rts : 0
Total IPv4
Backup Rts :
0 Total IPv6 Backup Rts : 0
Total
Supressed Rts
: 0 Total Hist. Rts :
0
Total
Decay Rts
: 0
Total VPN
Peer Groups : 2 Total VPN Peers : 2
Total VPN
Local Rts :
34
Total
VPN-IPv4 Rem. Rts : 8929 Total
VPN-IPv4 Rem. Act. Rts: 11
Total
VPN-IPv6 Rem. Rts : 1 Total
VPN-IPv6 Rem. Act. Rts: 0
Total VPN-IPv4 Bkup Rts : 0 Total VPN-IPv6 Bkup
Rts :
0
Total VPN
Supp. Rts :
0 Total VPN Hist. Rts : 0
Total VPN
Decay Rts :
0
Total
L2-VPN Rem. Rts
: 0 Total L2VPN Rem.
Act. Rts :
0
Total
MVPN-IPv4 Rem Rts : 0 Total
MVPN-IPv4 Rem Act Rts : 0
Total
MDT-SAFI Rem Rts : 266 Total MDT-SAFI Rem Act Rts : 2
Total MSPW
Rem Rts :
0 Total MSPW Rem Act Rts : 0
Total RouteTgt Rem Rts : 584 Total RouteTgt
Rem Act Rts :
584
Total
McVpnIPv4 Rem Rts : 0 Total
McVpnIPv4 Rem Act Rts : 0
Total
MVPN-IPv6 Rem Rts : 0 Total
MVPN-IPv6 Rem Act Rts : 0
Total EVPN
Rem Rts :
0 Total EVPN Rem Act Rts : 0
Total
FlowIpv4 Rem Rts : 0 Total FlowIpv4 Rem Act Rts : 0
Total
FlowIpv6 Rem Rts : 0 Total FlowIpv6 Rem Act Rts : 0
===============================================================================
BGP
Summary
===============================================================================
Neighbor
AS PktRcvd
InQ Up/Down State|Rcv/Act/Sent
(Addr Family)
PktSent
OutQ
-------------------------------------------------------------------------------
100.64.0.6
100 10941
0 17d00h18m 248/121/0 (IPv4)
6112 0
8891/5/27 (VpnIPv4)
-------------------------------------------------------------------------------
ALU-RTR#
Multiprotocol Reachable NLRI
information:
Please find the below image bgp update message for VPNv4 NLRI details sent to remote PE
router
