Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.
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Check the subnet mask and the default
gateway on the slow workstation. Chuck From: Steve
[mailto:ethereal@xxxxxxxxxxxxxxxxxx] Thanks for the comments, Jim. I’ve
waited a little while before replying in the hope there might have been other
responses. With regard to the physical layer, I have
physically put the fast PC on the same cable as the slow PC to check, and it is
still faster, so that’s not it. I tested some transfers across the LAN.
Inbound to the slow PC is always slower. Outbound is OK. Although an Ethereal
trace of a “slow” inbound transfer does show one ACK for every 2
segments when transferring across the LAN, and the difference in speed is not
so marked as when downloading from the Internet. Steve -----Original Message----- Hmmm. Not sure why the window sizes are
different or the ACK policies differ. Does anyone know how XP handles selective
ACK? It seems like the one that is ACKing multiple packets is faster (although
this is probably not the reason for the difference). Another basic Q. Is the physical layer
identical for both (cables, network drops, patch panels if any, switches, etc.
etc.) Can you try a file transfer within your
own network? Perhaps even between a "fast" and "slow"
machine (in each direction) or from both to (and from) a 3rd machine. This may not point out anything, but it
will be a more controlled test. It may be as simple as a physical or a
software (card / driver) issue, but what the *reason* behind it is not obvious.
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