Example for Configuring MPLS OAM for a PW

This section provides an example for configuring MPLS OAM to check the connectivity of a PW.

Networking Requirements

On the MPLS network shown in Figure 1, a static SS-PW is established between LSRA and LSRC.

Configure MPLS OAM to check the connectivity of the PW. If MPLS OAM detects a fault on the PW, it sends a BDI packet along the PW and reports the fault to the OAM module.

Figure 1 Configuring a PW over a bidirectional LSP

Interfaces 1 and 2 in this example are GE 0/1/0, GE 0/1/8, respectively.

**Table 1** Interfaces and IP addresses
Device	Interface	IP Address
LSRA	Loopback1	1.1.1.1/32
LSRA	Interaface1	2.1.1.1/24
LSRB	Loopback1	2.2.2.2/32
	Interaface1	2.1.1.2/24
	Interaface2	3.2.1.1/24
LSRC	Loopback1	3.3.3.3/32
LSRC	Interaface2	3.2.1.2/24

Configuration Roadmap

The configuration roadmap is as follows:

Enable MPLS OAM globally.
Establish a PW over a bidirectional LSP between LSRA and LSRC.
Configure MPLS OAM parameters in the MPLS-OAM view on the nodes at both ends of the PW.
(Optional) Enable MPLS OAM.

Data Preparation

To complete the configuration, you need the following data:

IP addresses at both ends of the PW
OAM detection packet type and interval at which OAM detection packets are sent
(Optional) Timeout period of the auto protocol

A timeout period must be configured in automatic negotiation mode but does not need to be configured in manual mode.

Procedure

Configure a PW over a bidirectional LSP.
For configuration details, see "Configuration Examples" in HUAWEI NetEngine 8000 F SeriesRouter Configuration Guide - VPN or Configuration Files in this section.

Enable MPLS OAM globally.

# Enable MPLS OAM globally on LSRA.

[~LSRA] mpls
[*LSRA-mpls] mpls oam
[*LSRA-mpls] commit
[~LSRA-mpls] quit

# Enable MPLS OAM globally on LSRC.

[~LSRC] mpls
[*LSRC-mpls] mpls oam
[*LSRC-mpls] commit
[~LSRC-mpls] quit

Configure MPLS OAM parameters in the MPLS-OAM view on the nodes at both ends of the PW.

# Configure MPLS OAM parameters on LSRA.

[~LSRA] mpls-oam
[~LSRA-mpls-oam]mpls oam l2vc peer-ip 3.3.3.3 vc-id 30000 vc-type vlan type cv auto-protocol
[*LSRA-mpls-oam] commit
[~LSRA-mpls-oam] quit

# Configure MPLS OAM parameters on LSRC.

[~LSRC] mpls-oam
[~LSRC-mpls-oam]mpls oam l2vc peer-ip 1.1.1.1 vc-id 30000 vc-type vlan type cv auto-protocol
[*LSRC-mpls-oam] commit
[~LSRC-mpls-oam] quit

Configuration Files

LSRA configuration file

#
 sysname LSRA
#
 mpls lsr-id 1.1.1.1
 mpls
  mpls te
  mpls oam
#
 mpls l2vpn
#
 bidirectional static-cr-lsp ingress Tunnel10
  forward nexthop 2.1.1.2 out-label 20
  backward in-label 20
#
pw-template tpatoc
 peer-address 3.3.3.3
 control-word
 tnl-policy tpatoc
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 2.1.1.1 255.255.255.0
 mpls
 mpls te
#
interface GigabitEthernet0/1/0.1
 vlan-type dot1q 1
 mpls
 mpls static-l2vc pw-template tpatoc 30000 transmit-vpn-label 101 receive-vpn-label 101
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
interface Tunnel10
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 3.3.3.3
 mpls te signal-protocol cr-static
 mpls te tunnel-id 100
 mpls te bidirectional
 mpls te reserved-for-binding
#
 ip route-static 2.2.2.2 255.255.255.255 2.1.1.2
 ip route-static 3.3.3.3 255.255.255.255 2.1.1.2
#
tunnel-policy tpatoc
 tunnel binding destination 3.3.3.3 te Tunnel10
#
 mpls-oam
   mpls oam l2vc peer-ip 3.3.3.3 vc-id 30000 vc-type vlan type cv auto-protocol overtime 0
#
return

LSRB configuration file

#
 sysname LSRB
#
 mpls lsr-id 2.2.2.2
 mpls
  mpls te
  mpls oam
#
 bidirectional static-cr-lsp transit lsp1
  forward in-label 20 nexthop 3.2.1.2 out-label 40
  backward in-label 16 nexthop 2.1.1.1 out-label 20
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 2.1.1.2 255.255.255.0
 mpls
 mpls te
 ais enable
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 3.2.1.1 255.255.255.0
 mpls
 mpls te
 ais enable
#
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
#
 ip route-static 1.1.1.1 255.255.255.255 2.1.1.1
 ip route-static 3.3.3.3 255.255.255.255 3.2.1.2
#
return

LSRC configuration file

#
 sysname LSRC
#
 mpls lsr-id 3.3.3.3
 mpls
  mpls te
  mpls oam
#
 mpls l2vpn
#
 bidirectional static-cr-lsp egress lsp1
  forward in-label 40 lsrid 1.1.1.1 tunnel-id 100
  backward nexthop 3.2.1.1 out-label 16
#
pw-template tpctoa
 peer-address 1.1.1.1
 control-word
 tnl-policy tpctoa
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 3.2.1.2 255.255.255.0
 mpls
 mpls te
#
interface GigabitEthernet0/1/0.1
 vlan-type dot1q 1
 mpls static-l2vc pw-template tpctoa 30000 transmit-vpn-label 101 receive-vpn-label 101
#
interface LoopBack1
 ip address 3.3.3.3 255.255.255.255
#
interface Tunnel20
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 1.1.1.1
 mpls te signal-protocol cr-static
 mpls te tunnel-id 200
 mpls te passive-tunnel
 mpls te binding bidirectional static-cr-lsp egress lsp1
 mpls te reserved-for-binding
#
 ip route-static 1.1.1.1 255.255.255.255 3.2.1.1
 ip route-static 2.2.2.2 255.255.255.255 3.2.1.1
#
tunnel-policy tpctoa
 tunnel binding destination 1.1.1.1 te Tunnel20
#
 mpls-oam
  mpls oam l2vc peer-ip 1.1.1.1 vc-id 30000 vc-type vlan type cv auto-protocol overtime 0
#
return