Supported VPWS Standards

Junos OS substantially supports the following RFCs, which define standards for VPWS and Layer 2 circuits.

• RFC 4447, Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP)

  Junos OS does not support Section 5.3, “The Generalized PWid FEC Element.”

• RFC 4448, Encapsulation Methods for Transport of Ethernet over MPLS Networks

• RFC 6074, Provisioning, Auto-Discovery, and Signaling in Layer 2 Virtual Private Networks (L2VPNs)

• RFC 6391, Flow-Aware Transport of Pseudowires over an MPLS Packet Switched Network

• RFC 6790, The Use of Entropy Labels in MPLS Forwarding

The following Internet drafts do not define standards, but provide information about Layer 2 technologies. The IETF classifies them as “Historic.”

• Internet draft draft-martini-l2circuit-encap-mpls-11.txt, Encapsulation Methods for Transport of Layer 2 Frames Over IP and MPLS Networks

  Junos OS differs from the Internet draft in the following ways:

  • A packet with a sequence number of 0 (zero) is treated as out of sequence.

  • Any packet that does not have the next incremental sequence number is considered out of sequence.

  • When out-of-sequence packets arrive, the expected sequence number for the neighbor is set to the sequence number in the Layer 2 circuit control word.

• Internet draft draft-martini-l2circuit-trans-mpls-19.txt, Transport of Layer 2 Frames Over MPLS