So I've got about 6 machines, all MS-Windows at a remote site connected
by 1000Mb/s ethernet over DWDM/Fiber.
It seems on a nightly basis, it rotates, which of thes machines hang.
The behaviour looks like the stereotypical NIC duplux mismatch, but
that's been verified, and is not the case....no CRC errors or anything
along the way, and the hang doesn't happen every night.....if a machine
hangs one night, it might be fine for a week, but others will take turns
having a bad night....on the bright side, I don't believe we've missed
the same machine twice in a row.
the server on this side and the client on the other side are connected
directly to switches, which are then connected directly to the DWDM
nodes....duplex and speed has been verified all along the way...
We've been sniffing traffic trying to capture something, but getting the
right client on the right NBU server interface is like playing
whack-a-mole....a couple nights ago, we caught one, and got the
following trace:
Source Dest Summary
master client DSI: Continuation of missing frame; 4 bytes of data
master client DSI: Continuation of missing frame; 1 byte of data
master client TCP: D=814 S=865 ACK=4282441235 WIN=64240
master client DSI: Continuation of frame 41; 4 bytes of data
master client DSI: Continuation of frame 41; 1 bytes of data
master client TCP: D=814 S=865 ACK=4282441236 WIN=64240
master client DSI: Continuation of frame 41; 4 bytes of data
master client DSI: Continuation of frame 41; 1 bytes of data
master client TCP: D=814 S=865 ACK=4282441237 WIN=64240
The "missing frame" message at the beginning and the repeated
"continuation of frame 41" got me intrigued, but I don't really know
what to make of it.
???
The interesting thing is that the linux and solaris boxes at the remote
site have been 100% problem free.
Paul
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