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Keith Fetterman wrote: | Thanks for the feedback. | | I think this problem is different. The remote server is inside our | intranet, but it is at a remote location, which we are connected to via | a T1. | | I have two other computers on the same subnet that are running Red Hat | Linux 3 and they do not experience this problem at all. One of these | computers is identical to the one that is experiencing the network | stall, i.e., same motherboard, processor and network card. The network | card is a "3Com Corporation 3c905C-TX/TX-M [Tornado]". | | This is weird. Since I have tried a different card, different cable and | different port on the switch, I am wondering if it has to do with the | network driver in FC3. | | I am wondering if this problem could be caused by other hardware in the | system? I have checked dmesg and /var/log/messages, but I can't find | any errors. | | Thanks for the feedback.
Couple of ideas focused on the idea it's a connectivity problem - check ifconfig and see if any of the error counters for eth0 are nonzero.
Also, time a "stall"... if you are experiencing packetloss for whatever reason the TCP reties get slower and slower each time, it would be interesting if the "stall" time is a number matching one of the timeouts.
Also, try to floodping an idle server on your network, and see how many packets get dropped, eg
ping -f -i 0 -s 1490 192.168.0.1
where 192.168.0.1 is the partner server. Make sure the target server is robust and otherwise idle. Leave it running for a while, every dropped packet gets a . printed. If you see no output, your connection can't be that bad.
Another way, use the network cable from a box NOT exhibiting the symptoms temporarily plugged in your bad machine and see if the symptoms thereby go away.
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