Bad cabling can do that do you (in order to send a packet, it must be
retransmitted many times.) Does ping drop packets? How about large
pings? ('ping -s 10240', or especially 'ping -f')
With 100Base-TX (half duplex), I am able to 'ping -f -s 10240' without
dropping packets, with only a few collisions, and I get an average
latency of 2.3ms.
Just because the collision light is on doesn't neccessarily mean there is
a problem. Both FTP and Samba here result in the collision light coming
on (for one of our hubs), but they still manage around 6MBps.
-Mike
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