[ntp:questions] Configuring IPv4 Multicastclient option

mayer at gis.net mayer at gis.net
Wed Apr 20 16:37:09 UTC 2005


----- Original Message Follows -----
> Hi,
> 
> I am using multicastclient configuration option, but was unsuccessful.
> The two machines are configured in the following way:
> 
> MACHINE 'A':
> 
> '/etc/ntp.conf' entries:-
> server <stratum1_server_address>
> broadcast 224.0.1.1
> keysdir /etc/ntp.keys
> trustedkey 1
> 
> '/etc/ntp.keys' entries:-
> 1   M   pass
> 
> 
> MACHINE 'B':
> 
> '/etc/ntp.conf' entries:-
> multicastclient 224.0.0.1
> keysdir /etc/ntp.keys
> trustedkey 1
> 
> /etc/ntp.keys:-
> 1   M   pass
> 
> 
> First, i started 'ntpd' on machine 'A' and allowed it to get
> synchronise  to stratum 1 server ( until machine 'A' attained a
> stratum number 2). At  this point, i started 'ntpd' on machine 'B' in
> debug mode.
> 
> Although 'B' was receiving packets from 'A' at regular intervals, but
> i  couldn't find out from any of the query tools ( 'ntpq' or 'ntpdc').
> 
> My Questions are:
> 
> 1> What is the exact behavior expected from machines 'A' and 'B' with 
> respect to 'broadcast 224.0.1.1' and 'multicastclient 224.0.1.1' 
> configurations.
> 
> 2>Using any ntp query tools 'ntpq' or 'ntpdc', can i check the status
> of  ntpd (with respect to multicastclient configuration) in machine
> 'B'. If  so, kindly mention the interactive internal commands that can
> be used to.
> 
> 3> How do i check that 'B' is actually updating its local clock with
> the  broadcast packets from 224.0.1.1, considering that 'B'  has
> selected 'A'  for synch thru 224.0.1.1.
> 
> Can anyone please explain me how exactly broadcast-multicastclient 
> configuration works.
> I would be greatful it anyone gives some useful pointers related to
> this  topic.

Did you read http://ntp.isc.org/bin/view/Support/ConfiguringAutokey
on how to set up autokeys?

Danny

> 
> Thanks in Advance,
> -Srikanth K.




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