The reference implementation of NTPd, at http://www.ntp.org was broken with respect to mcast, at one time. Seems RH built
their NTP rpm from this broken NTPd. Try 4.2.2p3 from
ntp.org site, I think multi/any/broad-cast now works, for the definite
answer
join the Usenet list for ntp and ask if it is not fixed in 4.2.2p3.
http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.1/ contains NTPd
4.1, mcast works in this version.
--
James H. Edwards
Network Systems Administrator
Judicial Information Division
jedwards@xxxxxxxxxxxx