RFC 2615 (rfc2615) - Page 2 of 10
PPP over SONET/SDH
Alternative Format: Original Text Document
RFC 2615 PPP over SONET/SDH June 1999 1. Introduction PPP was designed as a standard method of communicating over point-to-point links. Initial deployment has been over short local lines, leased lines, and plain-old-telephone-service (POTS) using modems. As new packet services and higher speed lines are introduced, PPP is easily deployed in these environments as well. This specification is primarily concerned with the use of the PPP encapsulation over SONET/SDH links. Since SONET/SDH is by definition a point-to-point circuit, PPP is well suited to use over these links. Real differences between SONET and SDH (other than terminology) are minor; for the purposes of encapsulation of PPP over SONET/SDH, they are inconsequential or irrelevant. For the convenience of the reader, we list the equivalent terms below: SONET SDH --------------------------------------------- SPE VC STS-SPE Higher Order VC (VC-3/4/4-Nc) STS-1 frame STM-0 frame (rarely used) STS-1-SPE VC-3 STS-1 payload C-3 STS-3c frame STM-1 frame, AU-4 STS-3c-SPE VC-4 STS-3c payload C-4 STS-12c/48c/192c frame STM-4/16/64 frame, AU-4-4c/16c/64c STS-12c/48c/192c-SPE VC-4-4c/16c/64c STS-12c/48c/192c payload C-4-4c/16c/64c The only currently supported SONET/SDH SPE/VCs are the following: SONET SDH ---------------------------------------- STS-3c-SPE VC-4 STS-12c-SPE VC-4-4c STS-48c-SPE VC-4-16c STS-192c-SPE VC-4-64c The keywords MUST, MUST NOT, MAY, OPTIONAL, REQUIRED, RECOMMENDED, SHALL, SHALL NOT, SHOULD, and SHOULD NOT are to be interpreted as defined in [6]. Malis & Simpson Standards Track
