RFC 2172 (rfc2172) - Page 2 of 3


MAPOS Version 1 Assigned Numbers



Alternative Format: Original Text Document



RFC 2172                         MAPOS                         June 1997


2. Protocol Field Assignments

   The MAPOS Version 1 Data Link Layer [1] contains a 16 bit Protocol
   field to identify the the encapsulated protocol.  The Protocol field
   is consistent with the ISO 3309 (HDLC) extension mechanism for
   address fields.  All protocol numbers MUST be assigned such that the
   least significant bit of the most significant octet equals "0", and
   the least significant bit of the least significant octet equals "1".

   Assigned MAPOS Protocol Numbers

      Value (in hex)  Protocol Name

      0001-001F       Not Used - reserved
      0021            MAPOS Version 1 Internet Protocol Version 4 [8]
      0023-FCFF       Not Used - reserved
      FE01            MAPOS Version 1 Address Resolution Protocol (ARP[8])
      FE03            MAPOS Version 1 Node Switch Protocol (NSP[9])
      FE05            MAPOS Version 1 Switch Switch Protocol (SSP[10])
      FE07-FEFF       Not Used - reserved


References

   [1]   Murakami, K. and M. Maruyama, "MAPOS - Multiple Access Protocol
         over SONET/SDH, Version 1," RFC-2171, June 1997.

   [2]   CCITT Recommendation G.707: Synchronous Digital Hierarchy Bit
         Rates (1990).

   [3]   CCITT Recommendation G.708: Network Node Interface for
         Synchronous Digital Hierarchy (1990).

   [4]   CCITT Recommendation G.709: Synchronous Multiplexing Structure
         (1990).

   [5]   American National Standard for Telecommunications - Digital
         Hierarchy - Optical Interface Rates and Formats Specification,
         ANSI T1.105-1991.

   [6]   Simpson, W., editor, "PPP in HDLC-like Framing," RFC-1662,
         July 1994.

   [7]   Postel, J., "Internet Protocol (IP)," RFC-791, September 1981.

   [8]   Murakami, K. and M. Maruyama, "IPv4 over MAPOS Version 1,"
         RFC-2176, June, 1997.




Maruyama &  Murakami         Informational