RFC 2701 (rfc2701) - Page 3 of 9

Nortel Networks Multi-link Multi-node PPP Bundle Discovery Protocol

RFC 2701                          MMP                     September 1999


2.1 Packet Format

   See "IANA Considerations" (section 6) for UDP port number assignment.

   A Discovery Message has the following format:

      +------+------+------------+------+----======----+
      | type |length| random ID  | hash | endpoint ID  |
      +------+------+------------+------+----======----+

   where:

   type - 2 octets

      Message type: 1-query, 2-response.

   length - 2 octets

      The length (in octets) of the endpoint ID.

   Random ID - 4 octets

      A random identifier generated by the RAS used to resolve
      contention.  See "Contention Handling" (section 2.4) for the use
      of this field.

   hash - 2 octets

      The unsigned sum (modulo 2^16) of the unsigned octets of the
      Endpoint ID.  A value of zero indicates that no hash has been
      generated.  See "Endpoint Identifier Matching" (section 2.2) for
      the use of this field.

   endpoint ID - variable length

      The endpoint identifier of the connection.  From the discovery
      protocol's point of view, this is an opaque value.  However, to
      ensure multi-vendor interoperability, the format of this field
      must be defined.  The descriptions of, and legal values for, the
      fields in the endpoint ID are defined in [MP].











Malkin                       Informational