[conspire] Network Latency on LAN

Bill Moseley moseley at hank.org
Thu Jul 26 10:08:16 PDT 2007

Looking for debugging tips:

I have a few machines running Debian Sid and Stable on an inexpensive
switch at home.  I just got a new Thinkpad running Feisty, and when
that is connected to the wired LAN (sitting right next to the switch
and other machines) ssh sessions to the laptop exhibit a lot of
latency.  I don't see this on any other machines, just the Thinkpad.

Typing is painful due to all the short delays.

I've tried swapping around the ports on the switch and using different
cables with no difference -- so it seems to be related just to the

Any suggestions on how to debug this?

The interface doesn't show any errors.  The switch is just a cheap SMC

Here's ifconfig on the Thinkpad.

eth0      Link encap:Ethernet  HWaddr 00:1A:6B:68:B3:AD  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::21a:6bff:fe68:b3ad/64 Scope:Link
          RX packets:9575 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6005 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:5915672 (5.6 MiB)  TX bytes:1278094 (1.2 MiB)
          Base address:0x3000 Memory:ee000000-ee020000 

02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller

Bill Moseley
moseley at hank.org

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