[AG-TECH] FYI, IETF Best Practices document on multicast address allocation

[Bob Olson]

http://www.ietf.org/internet-drafts/draft-albanna-iana-ipv4-mcast-guidelines-01.txt

4. Introduction

   The Internet Assigned Numbers Authority (IANA) (www.iana.org) is
   charged with allocating parameter values for fields in protocols
   which have been designed, created or are maintained by the Internet
   Engineering Task Force (IETF).  RFC 2780 [RFC2780] provides the IANA
   guidance in the assignment of parameters for fields in newly
   developed protocols. This memo expands on section 4.4.2 of RFC 2780
   and attempts to codify existing IANA practice used in the assignment
   IPv4 multicast addresses.

   The terms "Specification Required", "Expert Review", "IESG Approval",
   "IETF Consensus", and "Standards Action", are used in this memo to
   refer to the processes described in [RFC2434]. The keywords MUST,
   MUST NOT, MAY, OPTIONAL, REQUIRED, RECOMMENDED, SHALL, SHALL NOT,
   SHOULD, SHOULD NOT are to be interpreted as defined in RFC 2119
   [RFC2119].

   In general, due to the relatively small size of the IPv4 multicast
   addresses space, further allocation of IPv4 multicast address space
   is not recommended. Specifically, the IANA should only assign
   addresses in those cases where the dynamic selection (SDP/SAP), GLOP,
   SSM or Administratively Scoped address spaces cannot be used. The
   guidelines described below are reflected in on
   http://www.iana.org/cgi-bin/multicast.pl.