Selective forwarding with dhcrelay - PXE Master Server

[Alex Burger]

Hi Chuck.

We're using Windows for DHCP and switching to ISC is not an option. 
Windows supports classes, but I don't think it's possible to create a 
subclass using MAC addresses.  You can create a custom class and then 
configure the client using ipconfig /setclassid but that's not a good 
solution.  Vendor classes to pick out HP thin clients may work but I 
haven't tried it yet.

Alex


Chuck Anderson wrote:
> On Sat, Oct 11, 2008 at 09:09:29AM -0400, Alex Burger wrote:
>> I have created a patch for dhcrelay to allow you to specify which server  
>> to forward to based on the MAC address of the requesting client.  This  
.
> We got this to work without hacking the relay.  The trick is to relay 
> all DHCP requests to a real DHCP server, and not any PXE servers.  
> Then have the DHCP server hand out the PXE options to point the 
> different clients to the different PXE servers for "stage 2" where 
> they download their boot files.
> 
> e.g. in dhcpd.conf:
> 
> class "Class-Windows-Lab-PXE" {
>         match hardware;
> 
>         filename "\\boot\\x86\\wdsnbp.com";
>         next-server 10.1.2.3;
> }
> 
> subclass "Class-Windows-Lab-PXE" 1:00:24:4F:C2:66:FE;