Lousy Network Performance

[Net Llama!]

On Tue, 28 Jun 2005, Kurt Wall wrote:
> On Mon, Jun 27, 2005 at 09:08:44PM -0700, Net Llama! took 0 lines to write:
> > On 06/27/2005 07:56 PM, Kurt Wall wrote:
> > >Hi, list,
> > >
> > >How do I go about solving a significant latency problem on my
> > >internal network. I have two computers connected via a crossover
> > >cable, eth1 on the "server" (luther) to eth0 on the "desktop"
> > >(easter). Both cards are 10/100. Ping time is atrocious:
> > >
> > >From luther to easter:
> > >$ ping -c 10 easter
> [...]
> > >--- easter ping statistics ---
> > >10 packets transmitted, 10 received, 0% packet loss, time 9071ms
> > >rtt min/avg/max/mdev = 0.694/480.691/979.699/455.463 ms
> > >
> > >From easter to luther:
> > >$ ping -c 10 luther
> [...]
> > >--- luther ping statistics ---
> > >10 packets transmitted, 10 received, 0% packet loss, time 9002ms
> > >rtt min/avg/max/mdev = 0.418/597.109/1194.010/522.194 ms, pipe 3
> > >
> > >I can't see any reason why the latency should be so extreme.
> >
> > Any errors in ifconfig?  What kind of NICs do they have?
>
> No errors (well, 1):
> $ ifconfig eth0 | grep error
>           RX packets:21420 errors:1 dropped:0 overruns:0 frame:0
>           TX packets:15649 errors:0 dropped:0 overruns:0 carrier:0
>
> $ ifconfig eth1 | grep error
>           RX packets:1987 errors:1 dropped:0 overruns:0 frame:0
>           TX packets:1261 errors:0 dropped:0 overruns:0 carrier:0
>
> Cards are Tulip-based Tulip-based:
>
> $ dmesg | grep eth
> eth0: Lite-On 82c168 PNIC rev 32 at 0xa000, 00:C0:F0:3D:66:6C, IRQ 11.
> eth1: Lite-On 82c168 PNIC rev 32 at 0x9800, 00:A0:CC:D9:7A:75, IRQ 10.
>
> $ ethtool -i eth0
> driver: tulip
> version: 0.9.15-pre12
> firmware-version:
> bus-info: 00:0d.0
> $ ethtool -i eth1
> driver: tulip
> version: 0.9.15-pre12
> firmware-version:
> bus-info: 00:0e.0

What do you get from miitool eth0 and eth1?

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman                        netllama at linux-sxs.org
LlamaLand				http://netllama.linux-sxs.org