System and method for efficient MVPN source redundancy with S-PMSI
View Patent ↗A system, method and apparatus for source redundant MVPN in which a number of Interface Indices is reduced by leaf node Incoming Label Maps (ILM) including one or more Interface Indices common to multiple tunnels.
1. A method for providing Multicast Virtual Private Network (MVPN) source redundancy, the method comprising:
configuring a leaf node to use a first logical interface to receive data associated with a multicast channel from each of a Primary Source inclusive provider multicast service interface (I-PMSI) tunnel and a Primary Source selective provider multicast service interface (S-PMSI) tunnel; and
configuring said leaf node to use a second logical interface to receive data associated with said multicast channel from each of a Secondary Source I-PMSI tunnel and a Secondary Source S-PMSI tunnel.
2. The method of claim 1 , wherein each of said tunnels are associated with a respective Incoming Label Map (ILM) including an Interface Index representing a logical interface for receiving data, said configuring comprising:
associating said first logical interface with the ILM Interface Index of the Primary Source I-PMSI tunnel and the ILM Interface Index of the Primary Source S-PMSI tunnel; and
associating said second logical interface with the ILM Interface Index of the Secondary Source I-PMSI tunnel and the ILM Interface Index of the Secondary Source S-PMSI tunnel.
3. The method of claim 2 , further comprising:
in response to a request to receive said multicast channel, programming an (S, G) record for said multicast channel as:
ILM Interface Index of the Primary Source as RPF-Primary index;
ILM Interface Index of the Secondary Source as RPF-Secondary index; and
ILM Interface Index of I-PMSI tunnel from Rendezvous Point (RP) as RPF-RP-Index.
4. The method of claim 2 , further comprising:
communicating a Rendezvous Point (RP) I-PMSI Interface Index to PIM for use as an RPF-RP Index;
communicating a Primary Source ILM Interface Index to PIM for use as an RPF-Primary Index; and
communicating a Secondary Source ILM Interface Index to PIM for use as an RPF-Secondary Index.
5. The method of claim 1 , further comprising:
in response to receiving a join indicative of intent to receive a specific MVPN channel, transmitting a join towards a rendezvous point (RP) node, and programming a source group (SG) entry associated with the MVPN channel as RPF-RP=Interface Index of I-PMSI FROM the RP node.
6. The method of claim 5 , further comprising:
in response to learning a Primary Source PE node associated with the MVPN channel, transmitting a join towards the Primary Source PE node and programming a SG entry associated with the MVPN channel as RPF-Primary=Interface Index of I-PMSI from the Primary Source PE node.
7. The method of claim 6 , further comprising:
in response to learning a Secondary Source PE node associated with the MVPN channel, transmitting a join towards the Secondary Source PE node and programming a SG entry associated with the MVPN channel as RPF-Secondary=Interface Index of I-PMSI from the Secondary Source PE node.
8. The method of claim 7 , further comprising setting a flag to a first state to accept traffic from said Primary Source PE node and setting said flag to a second state to accept traffic from said Secondary Source PE node.
9. The method of claim 7 , further comprising:
in response to receiving a S-PMSI switch message from said Primary Source PE node associated with the MVPN channel, programming a SG entry associated with the MVPN channel as RPF-Primary=Interface Index of P-PMSI from the Primary Source PE node.
10. The method of claim 1 , wherein said leaf node has associated with it an Incoming Label Map (ILM) including an Interface Index common to each of a primary PE I-PMSI tunnel and a primary PE S-PMSI tunnel.
11. The method of claim 1 , wherein said leaf node has associated with it an Incoming Label Map (ILM) including an Interface Index common to each of a secondary PE I-PMSI tunnel and a secondary PE S-PMSI tunnel.
12. The method of claim 1 , wherein said leaf node has associated with it an Incoming Label Map (ILM) including an Interface Index common to each of a primary PE I-PMSI tunnel and a secondary PE I-PMSI tunnel.
13. The method of claim 1 , wherein said leaf node has associated with it an Incoming Label Map (ILM) including an Interface Index common to each of a primary PE S-PMSI tunnel and a secondary PE S-PMSI tunnel.
14. The method of claim 1 , wherein said leaf node comprises a label switching routers (LSRs) operating according to Multi-Protocol Label Switching (MPLS) Label Distribution Protocol (LDP).
15. The method of claim 1 , wherein path and routing information is determined by one or more of said leaf node, another leaf node and a management system.
16. An apparatus for providing Multicast Virtual Private Network (MVPN) source redundancy, the apparatus comprising:
a processor configured for:
configuring a leaf node to use a first logical interface to receive data associated with a multicast channel from each of a Primary Source inclusive provider multicast service interface (I-PMSI) tunnel and a Primary Source selective provider multicast service interface (S-PMSI) tunnel; and
configuring said leaf node to use a second logical interface to receive data associated with said multicast channel from each of a Secondary Source I-PMSI tunnel and a Secondary Source S-PMSI tunnel.
17. A non-transitory computer readable storage medium storing instructions which, when executed by a computer, cause the computer to perform a method for providing Multicast Virtual Private Network (MVPN) source redundancy, the method comprising:
configuring a leaf node to use a first logical interface to receive data associated with a multicast channel from each of a Primary Source inclusive provider multicast service interface (I-PMSI) tunnel and a Primary Source selective provider multicast service interface (S-PMSI) tunnel; and
configuring said leaf node to use a second logical interface to receive data associated with said multicast channel from each of a Secondary Source I-PMSI tunnel and a Secondary Source S-PMSI tunnel.
18. The non-transitory computer readable storage medium of claim 17 , wherein each of said tunnels are associated with a respective Incoming Label Map (ILM) including an Interface Index representing a logical interface for receiving data, said configuring comprising:
associating said first logical interface with the ILM Interface Index of the Primary Source I-PMSI tunnel and the ILM Interface Index of the Primary Source S-PMSI tunnel; and
associating said second logical interface with the ILM Interface Index of the Secondary Source I-PMSI tunnel and the ILM Interface Index of the Secondary Source S-PMSI tunnel.
19. A computer program product wherein computer instructions, when processed by a computer, cause the computer to perform a method for a providing Multicast Virtual Private Network (MVPN) source redundancy, the method comprising:
configuring a leaf node to use a first logical interface to receive data associated with a multicast channel from each of a Primary Source inclusive provider multicast service interface (I-PMSI) tunnel and a Primary Source selective provider multicast service interface (S-PMSI) tunnel; and
configuring said leaf node to use a second logical interface to receive data associated with said multicast channel from each of a Secondary Source I-PMSI tunnel and a Secondary Source S-PMSI tunnel.