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From: debbieg@smokey.sandiego.NCR.COM
Newsgroups: comp.protocols.time.ntp
Subject: xntpd packets dropped
Message-ID: <9103221652.ab22363@ncrcom.DaytonOH.NCR.COM>
Date: 22 Mar 91 21:49:12 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: Debbie Galeazzi <debbie.galeazzi@SanDiego.NCR.COM>
Distribution: inet
Organization: NCR E&M-San Diego, CA
Lines: 33

I am running xntpd on NCR System 3000's utilizing UNIX System V.4.  In
my current configuration I have 40-50 stratum 4 systems which
synchronize to the same 3 stratum 3 servers.  With this setup, the
servers drop many packets causing them to become unreachable to the
stratum 4 systems.  See as follows:

                      server1      server2       server3
xntpdc> iostats       
time since reset:      17740        17044         16512
total receive buffers: 25           30            20
free receive buffers:  24           29            19
used receive buffers:  0            0             0
low water refills:     3            4             2
dropped packets:       5892         5186          6412
ignored packets:       0            0             0
received packets:      3191         3973          2494
packets sent:          3817         4125          2756
packets not sent:      0            0             0
interrupts handled:    3131         3803          2446
received by interrupt: 9083         9159          8906

The stratum 4 systems poll every 64 seconds when a server is
reachable.

Are 40-50 pollers too many for a server to process?
Is the poll value of 64 seconds to small?
Is my problem elsewhere?

Thanks for any assistance!

Debbie.Galeazzi@SanDiego.NCR.COM
NCR Corporation
E&M - San Diego, California