[ntp:questions] help needed for ntpd multicast mode

Danny Mayer mayer at ntp.org
Mon Jan 17 14:51:39 UTC 2011


On 11/30/2010 2:20 PM, Dave Hart wrote:
> On Tue, Nov 30, 2010 at 18:50 UTC, Atul Gupta <atul14.kumar at gmail.com> wrote:
>> I used broadcastdelay in my client's config, but client is still trying to
>> send unicast messages to server after receiving multicast messages from
>> server.
> 
> You mentioned using ntp 4.2.0.  You can find your version's
> "broadcastdelay" documented at:
> 
> http://doc.ntp.org/4.2.0/miscopt.html
> 
> It reads to me like the behavior has changed in newer versions.  For ntpd
> 4.2.0 (circa 2003), it appears the unicast delay calibration is always
> attempted, and the broadcastdelay value is only used if the attempt fails.  If
> you upgrade to a recent version, using specifying broadcastdelay
> short-circuits the attempt.
> 

I know this is rather late but unless the code has changed recently
broadcastdelay didn't used to be usable for multicast and novolley does
not have any affect on multicast. It was meant for broadcast only. In
fact novolley does not exist for a multicastclient configuration.

Danny



More information about the questions mailing list