[ntp:questions] Multicast question

Danny Mayer mayer at ntp.isc.org
Fri Feb 29 03:34:28 UTC 2008


John Vossler wrote:
> Greetings,
> 
> I have a new system running Solaris 10 set up as an NTP server.  IT is 
> synchronizing correctly but I cannot get it to multicast on any 
> interface except the systems primary Ethernet interface, bge0.  I need 
> it to multicast on interfaces bge1-bge3 and ce0 - ce7.
> 
> Client systems reside on the network segments on these other interfaces.
> 
> Anyone have any suggestions on getting the server to multicast on these 
> other interfaces?
> 
> John

Are you talking about outgoing packets to a multicast address? I think 
that there may be some bugs in that area since the addresses are limited 
and choosing an outgoing address becomes an issue and it will only send 
it out on one address. I'm not sure if it's possible to set up a server 
(at least not easily) to send via different interfaces.

To do this correctly you need to be able to set up a different multicast 
address to use and associate it with a particular server address for 
each interface. The only way that I can think of to accomplish this is 
to be able to specify a specific binding address in the config file. We 
would have to add that as an optional parameter to the broadcast directive.

Danny



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