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Nortel Networks takes a critical step in MPLS multivendor interoperability by making the source code for the CR-LDP message processing engine free to all networking companies to implement on their own equipment. Download the software by clicking the link to the left.

The Multiple Protocol Label Switching (MPLS) approach proposed by the IETF is a networking technology to deliver the traffic engineering capability and Quality of Service performance for the backbone networks. MPLS can deliver control and performance to the routed IP data packets through label switched paths (LSPs), in particular, with the use of explicitly routed LSPs (ERLSPs). To implement the ERLSPs, two different protocols have come out of the IETF MPLS working group, namely the Constraint-based Routing using Label Distribution Protocol (CR-LDP) and the Resource ReSerVation Protocol (RSVP).

Constraint-based Routing using Label Distribution Protocol provides the signaling mechanism for path setup, teardown, and maintenance in traffic engineering of service provider backbone networks. CR-LDP is a robust signaling system offering great scalability, high reliability, and implementation simplicity. Best of all, it will be totally open for vendor implementation, therefore, offers the interoperability that is critical in carrier environment.


Additional Information

Press Releases:
Nortel Networks, Ericsson and General DataComm Demonstrate Key Component of MPLS Standard

Nortel Networks Initiates Major Step in MPLS Multivendor Interoperability


For background on MPLS and CR-LDP, check out IETF's MPLS working group site*




*This is a 3rd party link as described in our Web linking practices.