Slooooow networking...

Hi,
I'm running Mandrake 8.1 on a newtork and am experiencing severe problems
with speed. I have been assigned an IP and have set this along with the
subnet, DNS servers and gateway. Everything appears to work, but things
are rediculously slow, to the point that even a telnet session to a local
machine is a chore! A ping to a local machine reveals very slow
response and packet loss...

85 packets transmitted, 57 packets received, 32% packet loss
round-trip min/avg/max/mdev = 0.468/0.524/1.282/0.120 ms

On other machines the response is the order of 0ms! I therefore can't get
a web page up, and am having difficults all round.
Can anyone suggest where I might look for the bottleneck? I'm assuming
that it must be something in Linux as the same settings have been working
fine under Windoze.
any help greatly appreciated,
Regards,
Rai.

Rai! <(E-Mail Removed)> wrote:

> Hi,
> I'm running Mandrake 8.1 on a newtork and am experiencing severe problems
> with speed. I have been assigned an IP and have set this along with the
> subnet, DNS servers and gateway. Everything appears to work, but things
> are rediculously slow, to the point that even a telnet session to a local
> machine is a chore! A ping to a local machine reveals very slow
> response and packet loss...

> 85 packets transmitted, 57 packets received, 32% packet loss
> round-trip min/avg/max/mdev = 0.468/0.524/1.282/0.120 ms

Sounds like duplex mismatch (guess), check with 'mii-tool', try
'man mii-tool' for more options, post the output of /sbin/ifconfig
if problems persist.

--
Michael Heiming

Remove +SIGNS and www. if you expect an answer, sorry for
inconvenience, but I get tons of SPAM

On Mon, 15 Sep 2003, Michael Heiming wrote:

> Rai! <(E-Mail Removed)> wrote:
>
> > Hi,
> > I'm running Mandrake 8.1 on a newtork and am experiencing severe problems
> > with speed. I have been assigned an IP and have set this along with the
> > subnet, DNS servers and gateway. Everything appears to work, but things
> > are rediculously slow, to the point that even a telnet session to a local
> > machine is a chore! A ping to a local machine reveals very slow
> > response and packet loss...
>
> > 85 packets transmitted, 57 packets received, 32% packet loss
> > round-trip min/avg/max/mdev = 0.468/0.524/1.282/0.120 ms
>
> Sounds like duplex mismatch (guess), check with 'mii-tool', try
> 'man mii-tool' for more options, post the output of /sbin/ifconfig
> if problems persist.
>

Hi,
I tried mii-tool and this reported the following...
SIOCGMIIPHY on 'eth0' failed: Operation not supported
no MII interfaces found
I've never used this before so it's all new. AFAIK the network settings
are as I had them on a different machine some time ago and that worked
fine. The ifconfig for the ethernet is:

eth0 Link encap:Ethernet HWaddr 00:20:18:38:4F:63
inet addr:***.***.***.*** Bcast:***.***.255.255
Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19390118 errors:0 dropped:48 overruns:0 frame:2882
TX packets:20441 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1289315060 (1229.5 Mb) TX bytes:1529227 (1.4 Mb)
Interrupt:11 Base address:0xdc00
I've starred out the IP so I don't get grief from people here :-)

This box is normally not on a LAN (although the card is installed and
active) and uses a modem to connect to an ISP. Perhaps there's additional
filtering or security that may therefore be active? I'm fairly new to the
networking side of things (in case you couldn't tell ;-) ), so again any
tips are appreciated.
Regards,
Rai.

Rai! <(E-Mail Removed)> wrote:
....
> I tried mii-tool and this reported the following...
> SIOCGMIIPHY on 'eth0' failed: Operation not supported
> no MII interfaces found

Your card/driver doesn't allow mii operations.
What kind of NIC/driver are you running?

'lspci' and 'lsmod should show.

> I've never used this before so it's all new. AFAIK the network settings
> are as I had them on a different machine some time ago and that worked
> fine. The ifconfig for the ethernet is:



> eth0 Link encap:Ethernet HWaddr 00:20:18:38:4F:63
> inet addr:***.***.***.*** Bcast:***.***.255.255
> Mask:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:19390118 errors:0 dropped:48 overruns:0 frame:2882

The question, are those "frame" errors raising? Check cable/connectors,
try another cable.

--
Michael Heiming

Remove +SIGNS and www. if you expect an answer, sorry for
inconvenience, but I get tons of SPAM

On Mon, 15 Sep 2003, Michael Heiming wrote:

> Rai! <(E-Mail Removed)> wrote:
> ...
> > I tried mii-tool and this reported the following...
> > SIOCGMIIPHY on 'eth0' failed: Operation not supported
> > no MII interfaces found
>
> Your card/driver doesn't allow mii operations.
> What kind of NIC/driver are you running?
>
> 'lspci' and 'lsmod should show.
>
> The question, are those "frame" errors raising? Check cable/connectors,
> try another cable.
>

It's a realtek PCI card that is using an NEC2000 compatible driver -
normally this works fine here. As for the cable I have discounted this
as the connection is fine when running under Windows.
So what exactly is a frame error?
Regards,
Rai.

<snip>
> It's a realtek PCI card that is using an NEC2000 compatible driver -
> normally this works fine here. As for the cable I have discounted this
> as the connection is fine when running under Windows.
<snip>

Probably your DNS server is misconfigured. Try pinging servers on your
local network using IP addresses instead of Hostname or FQDN.

You can check what the route command returns. Tcpdump or Ethereal can
be good debugging tools.

Regards,
Navin.