tksjmi@sybil.cs.Buffalo.EDU (JoAnn Illuzzi) (12/06/89)
I am having some ftp problems involving pc's using 3c501s. I am pretty
sure ps/2s with 3c523s are having the problem also.
I can't get a handle on the circumstances that cause this problem.
I am posting 'the facts' about what happens in the hope of getting
some feedback from this list.
Ftps involving a pc will 'go to sleep' for several minutes, and this
happens with files over 4k or so. The transfer is going, but the ftp
literally stops for a few minutes.
On a lanayzer, here is what seems to happen, I am including seq and
ack numbers if they help-
mini/mainframe pc with 3c501
data to pc
seq=119062017
ack=30347265
ack
seq=30347265
ack=119062529
--- no activity for 2 minutes 43 seconds ----------------
ack
seq=15114455
ack=92480666
--- 2 second wait here -----------------------------------
ack
seq=30347265
ack=119062529
data to pc
seq=119062529
ack=30347265
---- normal stuff ----------
What is causing this delay of almost 3 minutes?? I don't have this
problem between larger machines, only when it is pc-mini/whatever,
mini/whatever to pc.
I have tested mainly with NCSA telnet 2.2tn, but have the same results
with other software packages like ka9q and ftp inc's pc/ftp.
Any suggestions are welcome!
thanks
JoAnn