PATCH for server/dhcp.c

[Brian T]

> The reason not to send a DHCPNAK on an unknown lease is that it prevents
> non-cooperating DHCP servers from coexisting.   You really don't want one
> DHCP server to assign an IP address not known to the other server, and 
> then
> have the other server send a DHCPNAK.   So even if a server is 
> authoritative,
> it still won't send a DHCPNAK for an unknown address - only for an address
> that is known to be invalid on the link or that it owns and has not 
> assigned
> to the client that's claiming it.

Ok, that makes sense kind of.  Why would you ever want 2 separate DHCP
servers on the same subnet?  Isn't that asking for an 
administrative/troubleshooting
nightmare?

-Brian