Configuring a P2MP LSP to Carry Multicast Traffic

An NG MVPN uses P2MP LSPs to carry multicast traffic. Only mLDP P2MP LSPs are supported.

Context

Currently, only mLDP P2MP tunnels can be used to carry multicast traffic. The mLDP P2MP tunnels are easy to configure. They are usually applied to networks that do not require control over destination nodes or high service quality. In addition, they do not require signaling packets to be periodically sent, reducing network pressure.

Perform the following steps on different PEs.

Procedure

Perform the following steps on a PE to be configured as a sender PE:
1. Run system-view
  The system view is displayed.
2. Run multicast mvpn mvpn-id
  An MVPN ID is configured.
3. Run ip vpn-instance vpn-instance-name
  The VPN instance view is displayed.
4. Run ipv4-family
  The VPN instance IPv4 address family view is displayed.
5. Run route-distinguisher route-distinguisher
  The RD of the VPN instance IPv4 address family is configured.
6. Run vpn-target vpn-target1 &<1-8> [ both | export-extcommunity | import-extcommunity ]
  The VPN-target extended community is configured for VPN instance IPv4 address family. The VPN instance can receive and process VPNv4 routes.
7. Run multicast routing-enable
  Multicast routing is enabled for the VPN instance IPv4 address family.
8. Run mvpn
  The VPN instance IPv4 address family MVPN view is displayed.
9. Run sender-enable
  The PE is configured as a sender PE.
10. Run c-multicast signaling bgp
  BGP is configured as the signaling protocol for transmitting C-multicast routes.
11. (Optional) Configure the PIM-SM MDT setup mode:
  - If you want PIM-SM MDTs to be set up across the public network, run the rpt-spt mode command.
  - If you want PIM-SM MDTs to be set up not across the public network, run the spt-only mode command.
12. Run auto-discovery inter-as
  Inter-AS auto discovery is enabled.
13. (Optional) Run import msdp
  The function of transmitting (S, G) entry information in Multicast Source Discovery Protocol (MSDP) Source Active (SA) messages to the remote PE through BGP Source Active A-D routes is enabled.
  
  If PIM-SM MDT setup is not across the public network, you can configure a PE or CE as a VPN instance's rendezvous point (RP). If a CE is configured as an RP, the CE needs to establish an MSDP peer relationship with its connected PE and transmit (S, G) entry information to the PE through MSDP SA messages. To enable this PE to transmit the (S, G) entry information to the remote PE through BGP Source Active A-D routes, run the import msdp command.
14. Run ipmsi-tunnel
  The MVPN I-PMSI view is displayed.
15. Run mldp (MVPN I-PMSI view)
  mLDP is used to establish an I-PMSI tunnel
16. Run commit
  The configuration is committed.
Perform the following steps on a PE to be configured as a receiver PE:
1. Run system-view
  The system view is displayed.
2. Run multicast mvpn mvpn-id
  An MVPN ID is configured.
3. Run ip vpn-instance vpn-instance-name
  The VPN instance view is displayed.
4. Run ipv4-family
  The VPN instance IPv4 address family view is displayed.
5. Run route-distinguisher route-distinguisher
  The RD of the VPN instance IPv4 address family is configured.
6. Run vpn-target vpn-target1 &<1-8> [ both | export-extcommunity | import-extcommunity ]
  The VPN-target extended community is configured for VPN instance IPv4 address family. The VPN instance can receive and process VPNv4 routes.
7. Run multicast routing-enable
  Multicast routing is enabled for the VPN instance IPv4 address family.
8. Run mvpn
  The VPN instance IPv4 address family MVPN view is displayed.
9. Run c-multicast signaling bgp
  BGP is configured as the signaling protocol for transmitting C-multicast routes.
10. (Optional) Configure the PIM-SM MDT setup mode:
  - If you want PIM-SM MDTs to be set up across the public network, run the rpt-spt mode command.
  - If you want PIM-SM MDTs to be set up not across the public network, run the spt-only mode command.
11. Run auto-discovery inter-as
  Inter-AS auto discovery is enabled.
12. (Optional) Run export msdp
  The function of transmitting (S, G) entry information in BGP Source Active A-D routes to the RP through MSDP SA messages is enabled.
  
  If PIM-SM MDT setup is not across the public network, you can configure a PE or CE as a VPN instance's RP. If a CE is configured as an RP, the CE needs to establish an MSDP peer relationship with its connected PE. To enable this PE to transmit (S, G) entry information in BGP Source Active A-D routes to the CE configured as the RP, run the export msdp command.
13. Run commit
  The configuration is committed.