[conspire] Network Latency on LAN

[Bill Moseley]

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
thinkpad.

Any suggestions on how to debug this?

The interface doesn't show any errors.  The switch is just a cheap SMC
10/100mb.

Here's ifconfig on the Thinkpad.

eth0      Link encap:Ethernet  HWaddr 00:1A:6B:68:B3:AD  
          inet addr:192.168.1.18  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21a:6bff:fe68:b3ad/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          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