Re: [gentoo-user] Be careful when using dhcp with a LiveCD

[Grant <emailgrant@gmail.com>]

> > I just spent a few hours trying to fix a problem where my Gentoo
> > router would only dhcp the ip address of the cable modem instead of
> > the proper IP address from the WAN.  I ended up enabling USE=vram and
> > it worked again.
> >
> > # equery uses dhcpcd
> >  + + vram : Disable DUID due to volatile media, such as a LiveCD
> >
> > I had just previously booted to a Damn Small Linux LiveCD when the
> > trouble started so I'm thinking the CD tried to dhcp from my cable
> > internet provider without a DUID which caused the provider to change
> > something which means that I need to disable the DUID from now on?
> > It's confusing but that's the best I can come up with.
> >
> > The point is: be careful when using dhcp from a LiveCD.  Your system
> > might act differently the next time you boot the hard drive.
>
> The dhcpcd was changed recently and not all dhcp servers take kindly to it,
> when it uses DUID the way it does (some servers depend on DUID passing on to
> them the MAC of the client).  The solution I also found was to set the vram
> flag.

Something must have changed on my ISP's end when my router tried to
dhcp via the Damn Small Linux LiveCD.  It had been running dhcp just
fine ever since I switched to this ISP (Cox) and failed every time
after I booted that LiveCD until I enabled vram.

- Grant
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