System and method for reflecting FEC route information
View Patent ↗Systems, methods, architectures and/or apparatus for reflecting information between provider equipment (PE) nodes associated with a Virtual Private LAN Service (VPLS) via a network element adapted to operate as a Forwarding Equivalence Class (FEC) Reflector (FR) node.
1. A method for reflecting Virtual Private LAN Service (VPLS) information between provider equipment (PE) nodes in a network, comprising:
designating a node to operate as a Forwarding Equivalence Class (FEC) Reflector (FR) node;
selecting one or more VPLS instances for concentration at said FR node;
establishing a targeted label distribution protocol (T-LDP) session between said FR node and each of said PE nodes associated with said selected one or more VPLS instances to provide a pseudo-wire mesh between the PE nodes via said FR; and
providing an exchange of common VPLS information by the FR node between any two nodes of the PE nodes through said FR node using the corresponding established T-LDP sessions.
2. The method of claim 1 , wherein said FR node comprises a PE node.
3. The method of claim 1 , wherein said designating is performed via an explicit configuration at a label distribution protocol (LDP) LDP.
4. The method of claim 1 , wherein:
said selecting comprises selecting a plurality of VPLS instances; and
said establishing comprises establishing a T-LDP session between said FR node and PE nodes associated with any of said plurality of VPLS instances.
5. The method of claim 4 , wherein said selected plurality of VPLS instances comprise all or a portion of existing VPLS instances.
6. The method of claim 4 , wherein said selected plurality of VPLS instances comprise VPLS instances associated with all or a portion of customers associated with existing VPLS instances.
7. The method of claim 4 , wherein said selected VPLS instances comprise VPLS instances associated with all or a portion of traffic types.
8. The method of claim 4 , wherein said selected VPLS instances comprise VPLS instances associated a number of T-LDP sessions exceeding a threshold number.
9. The method of claim 1 , wherein messages sent to said FR include one or both of an Originator PE Node address and a Target PE Node address.
10. The method of claim 9 , wherein said Originator PE Node address is included within an Originator-identifier (ID) time-length-value (TVL).
11. The method of claim 9 , wherein said Target PE Node address is included within an Originator-identifier (ID) time-length-value (TVL).
12. The method of claim 1 , wherein said FR node is adapted to identify a Target PE node associated with a received Label Mapping Message and transmit message information of said Label Mapping Message toward the identified Target PE node.
13. The method of claim 12 , wherein said FR node is adapted to identify said Target PE node using a Target-identifier (ID) time-length-value (TVL) included within said received Label Mapping Message.
14. The method of claim 12 , wherein said FR node is adapted to append an Originator PE Node address to said message information transmitted towards said Target PE node.
15. The method of claim 14 , wherein said Originator PE Node address is included within an Originator-identifier (ID) time-length-value (TVL).
16. The method of claim 13 , wherein said FR node is adapted to remove said Target-ID TLV before said message information is transmitted towards said Target PE node.
17. The method of claim 12 , wherein the message information transmitted toward the Target PE node comprises a Label Mapping Message including Forwarding Equivalence Class/Virtual Container (FEC/VC) Label information and Originator Node address, and adapted to enable the Target PE to associate a VC-Label to an appropriate Pseudo-wire.
18. An apparatus for reflecting Virtual Private LAN Service (VPLS) information between provider equipment (PE) nodes in a network, the apparatus comprising:
a processor configured for:
designating the apparatus as a node to operate as a Forwarding Equivalence Class (FEC) Reflector (FR) node;
selecting one or more VPLS instances for concentration at said FR node;
establishing a targeted label distribution protocol (T-LDP) session between said FR node and each of said PE nodes associated with said selected one or more VPLS instances to provide a pseudo-wire mesh between the PE nodes via said FR; and
providing an exchange of common VPLS information by the FR node between any two nodes of the PE nodes through said FR node using the corresponding established T-LDP sessions.
19. A non-transitory computer readable storage medium storing instructions which, when executed by a computer, cause the computer to perform a method for reflecting Virtual Private LAN Service (VPLS) information between provider equipment (PE) nodes in a network, the method comprising:
designating a node to operate as a Forwarding Equivalence Class (FEC) Reflector (FR) node;
selecting one or more VPLS instances for concentration at said FR node;
establishing a targeted label distribution protocol (T-LDP) session between said FR node and each of said PE nodes associated with said selected one or more VPLS instances to provide a pseudo-wire mesh between the PE nodes via said FR; and
providing an exchange of common VPLS information by the FR node between any two nodes of the PE nodes through said FR node using the corresponding established T-LDP sessions.
20. A non-transitory computer program product wherein computer instructions stored in a computer readable memory, when processed by a computer, adapt the operation of the computer to provide a method for reflecting Virtual Private LAN Service (VPLS) information between provider equipment (PE) nodes in a network, the method comprising:
designating a node to operate as a Forwarding Equivalence Class (FEC) Reflector (FR) node;
selecting one or more VPLS instances VPLS instance for concentration at said FR node;
establishing a targeted label distribution protocol (T-LDP) session between said FR node and each of said PE nodes associated with said selected one or more VPLS instances to provide a pseudo-wire mesh between the PE nodes via said FR; and
providing an exchange of common VPLS information by the FR node between any two nodes of the PE nodes through said FR node using the corresponding established T-LDP sessions.