multicastgroups(5)

NAME
multicastgroups - multicastgroups file specification

DESCRIPTION
This text file lists all the permanent IP multicast addresses and their corresponding membership keys. It is read by each magent daemon. Each line describes one multicast group, according to the following format:

  <multicast address> <key-high> <key-low> <group name>

All addresses are in internet dot format (a.b.c.d), and must be valid class D addresses, i.e., in the range 224.0.0.0 to 239.255.255.255. Membership keys are represented as a pair of 32-bit hex numbers. Unrestricted groups should have null keys (i.e., 00000000).

FILES
/etc/multicastgroups

BUGS
This file is applicable only for multicast support as specified in RFC-988. A new multicast support specification, RFC-1054, has been released which supercedes RFC-988. Only unrestricted groups should be used. The protection offered by restricted groups is bogus, and was never tested.

SEE ALSO
magent (8), multicastgroups (5), RFC-988

AUTHOR
Jay Kistler, 1990, Created