Re: Laptop DHCP problems

From: Walter Mautner (nextnews.15.eatallspam_at_spamgourmet.com)
Date: 12/20/03 

Date: Sat, 20 Dec 2003 11:56:29 +0100

Harry Phillips wrote:

> Are PCMCIA network cards different some how?
>
> I have a laptop, I have a DHCP server, in tty12 I display all the log
> messages. In tty12 I see the DHCPREQUEST and the DHCPACK when the laptop
> starts up, *twice*.
>
> When I run winipcfg on the Win98SE laptop it has all the DHCP assigned
> settings (Gateway, DNS server etc). However I cannot ping from the
> server to the laptop or vice versa.
>
> If I click 'Renew' in Winipcfg I don't see the Request or Ack and a
> message pops up in Windows saying that "DHCP server Unavailable".
>
> If I assign a static address to the NIC the problem still exists. I only
> have one PCMCIA card so I can't test if it is the card or not. I doubt
> it because I can see the link light and it requests and receives an IP
> address from my DHCP server.
>
> It is a Xircom NIC/56k Modem combo card and I am using the latest
> drivers from the Intel Web site.
>
We occasionally have similar problems, with cisco switches and brand desktop
10/100 NICs (SMC,3com ..). The only solution so far is turn off
autonegotiation and force both switchport and NIC driver to do 10MBit
halfduplex. Especially after updating the NT boxen to 2K, some of the NICs
exhibit the same behavior (they get IP, gateway, DNS ... from DHCP but stop
working afterwards). 

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Relevant Pages

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