Mailinglist Archive: opensuse-security (409 mails)

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Re: AW: [suse-security] Auto Negotiation with 8.0 (OT)
  • From: Andrew McCall <it.andrew.mccall@xxxxxxxxxxxxx>
  • Date: Fri, 9 Aug 2002 11:08:30 +0100
  • Message-id: <>
On Friday 09 August 2002 10:49 am, Ulrich Roth wrote:
> Hello Ziggy,
> > i know this is not a security related thing but i am
> > having a problem getting my suse 8.0 auto negotiating
> >
> > i tried setting the speed for my Nic using mii-tool
> > but it failed to recognise the Interface(eth0). Is
> > there another way i can get my Nic to negotiate at a
> > particular speed.
> So what do you want?
> Do you want your NIC to auto-negotiate its speed, as
> you said in the first paragraph, or do you want to set
> it to a fixed speed, as you said in the second paragraph?
> Auto-negotiate means: the NIC finds out which speed
> the opposite NIC can do, and then sets its own speed
> to the same speed as the opposite NIC.
> Normally, you connect your computer to a hub or switch.
> If the hub or switch can do 100 MBit/sec, the NIC of your
> computer will set to 100 MBit/sec.
> If the hub or switch can do only 10 MBit/sec, the NIC
> will set to 10 MBit/sec.
> That's called auto-negotiation and should be the default
> for most NICs.
> For the NICs from 3Com, for example, always existed a
> DOS based configuration program. Boot your computer
> to DOS and start the configuration program to enable or
> disable auto-negotiation or set the NIC to a fixed speed.
> But I don't know if other vendors offer also such a tool.
> Well, most operating systems nowadays should also be
> able to configure the NIC. I can set the speed of my
> Win2k machine in the properties of "My network places",
> but how to do this under Linux, I never tried out. :-(
> Best regards
> Uli

In addition to this, please be aware that there are lots of
hubs/switches/network cards that are unable to auto-negotiate correctly.

I have to manually set all my nics because they won't negtiate with a load of
CISCO equipment....


Andrew McCall
Internet System Administrator
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