In our last article, we demonstrated how to configure an L2VPN on routers within the same IGP domain: Implementation of PWE3 on Huawei Routers. Today’s article demonstrates how to configure a Pseudowire on routers in different IGP domains.

Configuration Steps

Step 1: Configure IP addresses on interfaces, and enable IS-IS and MPLS on interfaces in the MPLS backbone.

*******************************R1
sysname R1
#
mpls lsr-id 1.1.1.1
mpls
#
mpls l2vpn
#
mpls ldp
#
isis 10
 is-level level-2
 cost-style wide
 network-entity 49.0010.0010.0100.1001.00
 is-name R1
#
interface LoopBack0
 ip address 1.1.1.1 255.255.255.255
 isis enable 10
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.0 255.255.255.254
 isis enable 10
 mpls
 mpls ldp
#

*******************************R2
sysname R2
#
mpls lsr-id 2.2.2.2
mpls
#
mpls l2vpn
#
mpls ldp
#
isis 10
 is-level level-2
 cost-style wide
 network-entity 49.0010.0020.0200.2002.00
 is-name R1
#
interface LoopBack0
 ip address 2.2.2.2 255.255.255.255
 isis enable 10
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.1 255.255.255.254
 isis enable 10
 mpls
 mpls ldp
#
interface GigabitEthernet0/0/1
 ip address 10.10.10.2 255.255.255.254
 isis enable 10
 mpls
 mpls ldp
#

*******************************R3
sysname R3
#
mpls lsr-id 3.3.3.3
mpls
#
mpls l2vpn
#
mpls ldp
#
isis 10
 is-level level-2
 cost-style wide
 network-entity 49.0010.0030.0300.3003.00
 is-name R3
 import-route isis 20
#
isis 20
 is-level level-2
 cost-style wide
 network-entity 49.0020.0030.0300.3003.00
 is-name R3
 import-route isis 10
#
interface LoopBack0
 ip address 3.3.3.3 255.255.255.255
 isis enable 20
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.3 255.255.255.254
 isis enable 10
 mpls
 mpls ldp
#
interface GigabitEthernet0/0/1
 ip address 10.10.10.4 255.255.255.254
 isis enable 20
 mpls
 mpls ldp
#

*******************************R4
sysname R4
#
mpls lsr-id 4.4.4.4
mpls
#
mpls l2vpn
#
mpls ldp
#
isis 20
 is-level level-2
 cost-style wide
 network-entity 49.0020.0040.0400.4004.00
 is-name R1
#
interface LoopBack0
 ip address 4.4.4.4 255.255.255.255
 isis enable 20
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.5 255.255.255.254
 isis enable 20
 mpls
 mpls ldp
#

Step 2: Verify IS-IS status in the MPLS backbone network. Verify R1 can ping R4 loopback address(4.4.4.4).

Step 3: Configure MPLS LDP remote peers between R1 and R3, R3 and R4.

************************R1
mpls ldp remote-peer 3.3.3.3
 remote-ip 3.3.3.3
#

************************R3
mpls ldp remote-peer 1.1.1.1
 remote-ip 1.1.1.1
#
mpls ldp remote-peer 4.4.4.4
 remote-ip 4.4.4.4
#

************************R4
mpls ldp remote-peer 3.3.3.3
 remote-ip 3.3.3.3
#

Step 4: Configure a PWE3 between R1 and R4 on interfaces facing the CEs. We use 100 as the VC-ID on both R1 and R4.

********************************R1
#
interface GigabitEthernet0/0/1.100
 vlan-type dot1q 100
 mpls l2vc 3.3.3.3 100 raw
 mpls l2vc service-name 100
#

********************************R1
#
interface GigabitEthernet0/0/1.100
 vlan-type dot1q 100
 mpls l2vc 3.3.3.3 100 raw
 mpls l2vc service-name 100
#

Because R1 and R4 are in different IS-IS process, we need to configure our Pseudowire to switch on R3.

*****************************R3
mpls switch-l2vc 1.1.1.1 100 between 4.4.4.4 100 encapsulation ethernet
#

Step 5: Verify status of PWE3 on R1 and R4.

On R3, we can see the status of the switching as shown below:

Step 6. Configure R5 and R6 and confirm connectivity over the PWE3.

*************************R5
#
interface GigabitEthernet0/0/0.100
 vlan-type dot1q 100
 ip address 172.100.100.0 255.255.255.254
#

*************************R6
#
interface GigabitEthernet0/0/0.100
 vlan-type dot1q 100
 ip address 172.100.100.1 255.255.255.254
#

Ping R6 IP address from R5 and verify the MAC address table of R5 and R6.

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