Configuring Level 1 Carrier CE to Access Level 1 Carrier PE (Inter-AS)

If the Level 1 carrier and the Level 2 carrier are in different ASs, the Level 1 carrier takes the Level 2 carrier as its VPN user, and the configuration of carrier's carrier is similar to the configuration of CE accessing PE in the basic BGP/MPLS IP VPN.

Procedure

Create a VPN instance on the Level 1 carrier PE.
1. Run system-view
  The system view is displayed.
2. Run ip vpn-instance vpn-instance-name
  A VPN instance is created and the VPN instance view is displayed.
3. Run ipv4-family
  The IPv4 address family is enabled for the VPN instance and the VPN instance IPv4 address family view is displayed.
4. Run route-distinguisher route-distinguisher-name
  The RD of the VPN instance IPv4 address family is set.
5. Run apply-label per-route
  Each route is allocated a label.
6. Run vpn-target vpn-target &<1-8> [ both | export-extcommunity | import-extcommunity ]
  One or multiple VPN targets are configured for the VPN instance IPv4 address family.
7. Run quit
  Return to the system view.
8. Run interface interface-type interface-number
  The view of interface connected to the Level 1 carrier CE is displayed.
9. Run ip binding vpn-instance vpn-instance-name
  The interface is bound to the VPN instance.
10. Run ip address ip-address { mask | mask-length }
  An IP address is configured for the interface.
11. Run mpls
  MPLS is enabled on the interface.
12. Run commit
  The configuration is committed.
Configure labeled BGP on the Level 1 carrier PE.
1. Run system-view
  The system view is displayed.
2. Run route-policy route-policy-name permit node seq-number
  A route-policy is created for the Level 1 carrier CE.
3. Run apply mpls-label
  Labels are allocated to IPv4 routes.
4. Run quit
  Return to the system view.
5. Run bgp as-number1
  The BGP view is displayed.
6. Run ipv4-family vpn-instance vpn-instance-name
  The BGP VPN-instance IPv4 address family view is displayed.
7. Run peer ipv4-address as-number as-number2
  The Level 1 carrier CE is specified as the EBGP peer.
8. Run peer ipv4-address label-route-capability
  The function of exchanging labeled IPv4 routes is enabled.
9. Run peer ipv4-address route-policy route-policy-name export
  Labels are assigned to routes advertised to the Level 1 carrier CE.
10. Run import-route direct
  Direct routes are imported.
11. Run commit
  The configuration is committed.
Configure labeled BGP on the Level 1 carrier CE between it and the Level 1 carrier PE.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The view of the interface connected to the Level 1 carrier PE is displayed.
3. Run ip address ip-address { mask | mask-length }
  An IP address is configured for the interface.
4. Run mpls
  MPLS is enabled on the interface.
5. Run quit
  Return to the system view.
6. Run route-policy route-policy-name permit node seq-number
  The route-policy is created for the Level 1 carrier PE.
7. Run apply mpls-label
  Labels are assigned to IPv4 routes.
8. Run quit
  Return to the system view.
9. Run bgp as-number
  The BGP view is displayed.
10. Run peer ipv4-address as-number as-number1
  The Level 1 carrier PE is specified as the EBGP peer.
11. Run peer ipv4-address label-route-capability
  The function of exchanging labeled IPv4 routes is enabled.
12. Run peer ipv4-address route-policy route-policy-name1 export
  Labels are assigned to the routes advertised to the Level 1 carrier PE.
13. Run commit
  The configuration is committed.
Configure labeled BGP on the Level 1 carrier CE between it and the Level 2 carrier PE.
1. Run system-view
  The system view is displayed.
2. Run route-policy route-policy-name permit node seq-number
  A route-policy is created for the Level 2 carrier PE.
3. Run if-match mpls-label
  The labeled IPv4 routes are matched.
4. Run apply mpls-label
  Labels are assigned to IPv4 routes.
5. Run quit
  Return to the system view.
6. Run bgp as-number
  The BGP view is displayed.
7. Run peer ipv4-address as-number as-number
  The Level 2 carrier PE is configured as the IBGP peer.
8. Run peer ipv4-address connect-interface loopback interface-number
  The interface used to set up a TCP connection is specified.
9. Run peer ipv4-address label-route-capability
  The function of exchanging labeled IPv4 routes is enabled.
10. Run peer ipv4-address route-policy route-policy-name export
  Labels are assigned to the labeled IPv4 routes advertised to the Level 2 carrier PE.
11. Run import-route protocol process-id
  Internal routes of the Level 2 carrier network are imported.
12. Run commit
  The configuration is committed.
Configure labeled BGP on the Level 2 carrier PE.
1. Run system-view
  The system view is displayed.
2. Run bgp as-number
  The BGP view is displayed.
3. Run peer ipv4-address as-number as-number
  The Level 1 carrier CE is specified as the IBGP peer.
4. Run peer ipv4-address connect-interface loopback interface-number
  The interface used to set up a TCP connection is specified.
5. Run peer ipv4-address label-route-capability
  The function of exchanging labeled IPv4 routes is enabled.
6. Run commit
  The configuration is committed.