[nsp] dsl/dhcp question

[Charles Sprickman]

On Mon, 30 Jun 2003, Siva Valliappan wrote:

> Hi Charles,
>
>    this is definitely possible.  you will need to enable option 82
> support on the router side.  what this does is that it fills in additional
> fields in the DHCP Discover packet that is proxied to the DHCP server.
> The server can then use the additional information to issue the same
> address if desired.  however, you will need to make changes to the
> DHCP server as well to make this happen.

That looks very interesting...  From a quick reading of the isc-dhcp docs
it seems this is possible using their dhcp server.  Now I need to find
a box for this...

> unfortunately i don't have a handy config sample for the DHCP server side.
> hope this helps you get started.

If anyone else has some examples for isc-dhcpd, that would be great.

So I'm imagining things if I thought the internal dhcp server could do
things based on what interface a request came from, right?

Thanks,

Charles

> cheers
> .siva
>
> On Sat, 28 Jun 2003, Charles Sprickman wrote:
>
> > Hello,
> >
> > I don't think the BBA list is big enough yet, so I thought I'd ask here.
> >
> > Some time ago when I first started looking at moving everyone from IRB to
> > RBE, I could have sworn I found a doc on CCO that had some nifty tricks
> > with RBE and DHCP.  Namely, that each user/subinterface could be tied to a
> > particular IP address.  ie: if a dhcp request came in on "atm 2/0.1999",
> > the dhcp server would always try to give out the same fixed IP.
> >
> > Did I imagine that?  I'm knee-deep in CCO and not seeing it.
> >
> > The goal is to auto-configure people who want static addresses without
> > knowing their mac address in advance.
> >
> > Anyone doing something similar and willing to share?  It looks like this
> > "option 82" thing can tell an external dhcp server something about where
> > the request came from, but I'm not sure which dhcp server support this.
> >
> > Thanks,
> >
> > Charles
> >
> > --
> > Charles Sprickman
> > spork at inch.com
> >
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