Re: [WinMac] Re: fixed IP numbers in a DHCP range

Tim Scoff(casper[at]nb.net)
Fri, 29 Jan 1999 10:39:24 -0500 (EST)

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That is the technique that I suggest also. It works very well.

On Fri, 29 Jan 1999, Michael Eilon wrote:

> At 8:32 PM -0500 28/1/99, Alex Dearden wrote:
> >> It's bad practice to "nail" an IP address in a DHCP environment,
> >>because
> >>if you take the device offline and the address lease expires, and then you
> >>bring the device back online you'll have two devices with the same IP
> >>address... And all hell breaks loose.
> >
> >So, increase the time of the lease. If NT needs an IP address and there
> >is a reserved address but the device is offline. It'll use that address.
>
> Forgive me if I'm being dense, but why not simply have the DHCP server
> reserve IP numbers based on the ethernet address of the device?
>
> Not that I'm an expert on DHCP, but my colleague who's in charge of the
> Departmental Server (Debian Linux) has DHCP set up in this way: we have a
> number of printers (and really old Macs) that can't handle DHCP, so I get
> him the ethernet addresses, and he allocates a fixed IP number for them.
>
> Haven't had any problems with this setup, even if there's downtime for the
> those devices... as far as I can make out, the DHCP server doesn't allocate
> the "reserved" IP number until the device with the appropriate ethernet
> number comes back online.
>
> Maybe I'm missing something, and there are reasons why our setup is not
> good in certain situations, but it seems like a painless way to have static
> IP numbers in a DHCP environment.
>
> Cheers,
>
> Michael Eilon
> Assistant computer manager
> Dept. of Physics
> University of Western Australia
>
>
>
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Next message: John W. McCarthy: "[WinMac] Today, a sense of humor on the list."
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In reply to: Alex Dearden: "[WinMac] Re: DHCP"
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