Network speed

[Mike]

It appears as though the problem is an incompatibility of some sort between
the switch it's plugged into and the NIC.  Here's why:  I finally got around
to moving the machine back into the office where the main gigabit router is,
just so I could use the keyboard and monitor to figure out what's going
on.... Lo and behold, full gigabit connection! I can't say I'm too
surprised, as that same switch won't talk to my 2001 era Dell laptop AT
ALL...no connection whatsoever. So I might give Netgear a nasty call (as
politely as possible) and ask what's going on with their hardware and why it
won't play nicely with D-link hardware. Thanks for your help, sorry I was so
long in responding again.

-Mike 

-----Original Message-----
From: ubuntu-users-bounces at lists.ubuntu.com
[mailto:ubuntu-users-bounces at lists.ubuntu.com] On Behalf Of Peter Garrett
Sent: Monday, January 01, 2007 4:10 PM
To: ubuntu-users at lists.ubuntu.com
Subject: Re: Network speed

On Mon, 1 Jan 2007 09:32:24 -0700
"Mike Mikkelsen" <raindancer21 at gmail.com> wrote:

> Everything
> works fine, except that the new D-Link DGE-530T gigabit NIC I 
> installed in the box doesn't seem to want to connect at 1Gb/s, it will 
> only connect at 100Mbit.  There's a Linux driver that comes with the 
> card, but the instructions for installing it are pretty much limited 
> to, "merge it into the Kernel and recompile".  Which I have not the 
> faintest clue how to do, and frankly, it seems like doing that would 
> be more trouble than it's worth to me.

Depending on how well the stock kernel supports the NIC, the supplied driver
might not be necessary. To see what the kernel has set for the card, you can
run

sudo ethtool eth0  

( or eth1 etc if you have multiple cards. )

The ethtool can also be used to set various parameters - but its use is
beyond my experience, so I won't venture any help on that :) The manual page
looks reasonably comprehensible...

man ethtool

Usually the rate is auto-negotiated  of course, but this may be a case where
it needs tweaking. I seem to recall reading that there are a few gotchas
involved - such as connected systems expecting auto-negotiate and getting
confused by manual settings - but that is vague I know :)

Perhaps someone with more experience will jump in - but the output of 

sudo ethtool eth0

and 

sudo mii-tool -v eth0    # -v for verbose - see man mii-tool

or whatever your interface is, might help .

Peter

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