Righ, but both subinterfaces are going to see the boradcast. So it will look like there was a request on each of the networks that the DHCP server is providing addresses for. Because of that, the range that is all reserved will not have a free address to give to the requesting client, so it will send a NACK. Because of this, even if the other sub-interface responds with a proposal, the client will receive the NACK and not bind to that address. > By the MAC address as Bryan stated earlier. Atleast the ISC dhcp > server can handle this is memory serves. > > Mike > > On Tue, Nov 07, 2006 at 12:57:17PM -0500, Michael Knisely wrote: >> How could you server 2 dhcp address spaces off the same physical >> interface even if you are using subinterfaces? >> >> The dhcp request is going to come in as a 255.255.255.255 broadcast and >> a ff.ff.ff.ff.ff.ff boradcast. It's going to hit both of the >> subinterfaces. >> >> If you reserve the entire pool, you'll get the DHCP server giving the >> client a NACK and the client won't accept the offer by on the other >> subinterface. >> >> Mike K. >> >> Bryan Savage wrote: >> >Michael Knisely wrote: >> >>So, would you use policy based routing to direct users within the >> >>reserved >> >>DHCP pool to one captive portal and those not reserved to the >> >>authenticating server's portal? >> >>Or, would you use Apache to display a page based upon the address of >> >>the requester? What is the Apache module that does this? >> >> >> >Keep all the business logic is in the router/firewall. Putting any >> >type of list in Apache would mean duplicate effort to maintain the >> list. >> >You /could/ use one pool but I suggest using use two pools for >> >simplicity (Authorized MAC addresses in one pool. Everyone else in >> >another). >> >>You're not, as I know DHCPD, going to be able to assign two different >> >>address ranges via the same physical LAN, right? >> >> >> >> >> >> >> >You can assign multiple number of IP ranges on the same interface. I'd >> >have to look up how to do this but I know it is possible since I've >> >done it. It's also noteworthy that if you want two different subnets >> >to work on the same interface, you need two IP addresses on that >> >interface. >> > >> >Bryan >> > >> > >> > >> >Bryan >> > >> > >> > >> >To unsubscribe send to ncolug-request@xxxxxxxxxxxxx with 'unsubscribe' >> >in the Subject field. >> > >> >> >> To unsubscribe send to ncolug-request@xxxxxxxxxxxxx with 'unsubscribe' >> in >> the Subject field. >> >> > > To unsubscribe send to ncolug-request@xxxxxxxxxxxxx with 'unsubscribe' in > the Subject field. > > To unsubscribe send to ncolug-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field.