From: Don Weeks (dweeks@spatialwireless.com)
Date: Mon Nov 18 2002 - 12:48:18 EST
I have an number of CPCI based Sun systems where each chassis (group of 12)
is isolated in its own network. I need to set up a server on one and
clients on all the others. After reading the blue prints and other docs, I
selected a broadcast server to the multicast address on one machine and
used the default Solaris client config on the others. However, I never get
any packets on the clients. From debug on xntp it appears that the
broadcasts happen but never appear on the clients (Seen with tcpdump). I
believe that the problem stems from multicast as I never see any incoming
packets on any machine. The hardware vendor directs me to the Solaris 8 man
page which suggests a multicast kernel. Is there some mysterious setting to
turn multicast on in the kernel? NTP Multicast works fine on my networked
Ultra's and I never enabled anything. Where is group registration
happening? I can see through snoop that registration packets are sent out.
Don't know where they are received. Are there any good programs that can
verify multicast functionality? I have tried multicast ping but it always
comes back. Thanks for any help you can provide. I know there are
alternative ways to configure NTP but not as desirable as I believe
multicast will utilize both physical interfaces without requireing a
reconfigure. (BTW, I can not hook up an analyzer as all network traffic
flows along the backplane.
Don
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