Dynamic IP address assignment

tom at ceisystems.com tom
Thu Sep 18 22:29:58 PDT 2003


	That's exactly what I was thinking of.  The only reason I didn't
go out looking on the IETF page myself is that I've been typing email
replies since I sent my last one to this list.  I hate missing two full
days of mail.

	Anyway, I agree.  Since there is no standard, and the draft is
specific to say that an IP Addressing service would normally be handled
by Layer 3 devices (IP, etc.), it really goes well beyond the scope of

	That said, I'm sure someone could easily hack something up with
one of my many existing DHCP servers.  I would think something on the
order of registering a MAC address with the DHCP server, which would
then determine what IP to assign to the client once it made its request.
This is, of course, if it hasn't already been done.

Good luck,
Thomas Cameron

> There is no such spec.. ;-) and even if there were, both 
> 802.1X and 802.11 are below IP layer and don't really care 
> about IP address assignment. IEEE 802.11i describes some IEEE 
> 802.1X <-> 802.11 interaction, but it does not consider 
> things like IP addresses for STAs.
> IETF draft draft-congdon-radius-8021x-30.txt might come 
> closest here with following description:
> 3.7.  Framed-IP-Address, Framed-IP-Netmask
> IEEE 802.1X does not provide a mechanism for IP address 
> assignment. Therefore the Framed-IP-Address and 
> Framed-IP-Netmask attributes can only be used by IEEE 802.1X 
> Authenticators that support IP address assignment mechanisms. 
>  Typically this capability is supported by layer 3 devices.
> But like I said before, this could be something like calling 
> a separate program, etc. In other words, implementation specific.
> -- 
> Jouni Malinen                                            PGP 
> id EFC895FA

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