[ntp:questions] Re: Different types of associations in the ntpq billboard

Ronan Flood ronan at noc.ulcc.ac.uk
Mon Apr 10 15:19:31 UTC 2006

Heiko Gerstung <heiko.gerstung_removeme_ at meinberg.de> wrote:

> I just tested broadcastclient under Windows and saw that the association 
> created based on the received ntp broadcasts is listed just like any 
> unicast association.
> I thought that the "t" column refers to the association type, which can 
> be "l" (for local refclocks such as hardware refclocks or the LOCAL 
> refclock), "u" for "Unicast", "m" for "Multicast" and "b" for 
> "Broadcast" associations.
> Is this a bug(tm) or a feature(tm), in other words: Is it really wanted 
> to let broadcast associations look like unicast associations or did I 
> get the meaning of the "t" column wrong?

Looking at ntpq_ops.c/decodeaddrtype(), it only shows "b" for an IPv4
non-multicast destination address ending in 255 -- I guess you're
subnetting, or using IPv6.

                      Ronan Flood <R.Flood at noc.ulcc.ac.uk>
                        working for but not speaking for
             Network Services, University of London Computer Centre
     (which means: don't bother ULCC if I've said something you don't like)

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