ntpd multicast TTL

Christian Weisgerber naddy at mips.inka.de
Sun Mar 7 16:19:08 UTC 2010


ntpd is a convenient source of multicast packets for testing purposes.
When I add

broadcast 224.0.1.1

to my ntp.conf, ntpd sends a multicast packet with TTL 1 every 64
seconds.  Just as expected.  However, when I explicitly specify the
TTL as in

broadcast 224.0.1.1 ttl 1

it sends packets with TTL 32.  Trying a few other numbers confirms
that it multiplies the specified TTL by 32.  That is not expected.
(I also don't recall this happening the last time I tried it, but
that may have been years ago.)

Is this simply a bug in ntpd?


7.3-PRERELEASE from yesterday.
-- 
Christian "naddy" Weisgerber                          naddy at mips.inka.de



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