What are the clients involved... WinNT/2000?  AIX,? etc.
Have you looked at the event logs (NT term) of those clients to see if
there are any errors reported there?  We had a similar error message show
up on a few slower processing NT servers.  We ended up replacing the NICs
on those nodes, as well as rescheduling them so there is less network
traffic during their backups.  That seemed to help.  The servers that had
issues are quad 200MHz machines running WinNT 4.0.  Faster MHz nodes didn't
seem to have issues.
Just a thought.  Good luck.
Todd




                    Jim Healy
                    <James.Healy@AXA       To:     ADSM-L AT VM.MARIST DOT EDU
                    -TECH.COM>             cc:
                    Sent by: "ADSM:        Subject:     Re: TSM network problem
                    Dist Stor
                    Manager"
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                    T.EDU>


                    04/15/02 03:16
                    PM
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There are no routers involved, just connections from the 3 tsm nics to the
switch and the switch to the clients




"PINNI, BALANAND (SBCSI)" <bp3965 AT SBC DOT COM>@VM.MARIST.EDU> on 04/15/2002
04:06:41 PM

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

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Subject:  Re: TSM network problem


traceroute to nis.nsf.net (35.1.1.48), 30 hops max, 56 byte packet
 1 helios.ee.lbl.gov (128.3.112.1) 19 ms 19 ms 0 ms
 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms
 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 39 ms
 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 39 ms 39 ms 39 ms
 6 128.32.197.4 (128.32.197.4) 40 ms 59 ms 59 ms
 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 59 ms
 8 129.140.70.13 (129.140.70.13) 99 ms 99 ms 80 ms
 9 129.140.71.6 (129.140.71.6) 139 ms 239 ms 319 ms
10 129.140.81.7 (129.140.81.7) 220 ms 199 ms 199 ms
11 nic.merit.edu (35.1.1.48) 239 ms 239 ms 239 ms