[NCLUG] DHCP Help

[Matt Taggart]

> Any ideas what I am doing wrong?

How is your "proxy" doing this? DHCP requests are both sent and received as 
broadcast traffic. Are you forwarding all DHCP broadcast traffic from the 
other subnets to 10.147.0.11? How are the replies supposed to get back? I 
suspect your dhcp server receives a dhcp broadcast request on an interface 
and then looks to see what subnet the machine is using for that interface 
and then uses that to decide what address to return. This is why it doesn't 
work without your "dummy" entry, it doesn't know what to do.

I think you have it pretty confused and it probable should have just given 
an error rather than the behavior you saw.

Probably what you want to do is either
A) multihome the machine on all the subnets
B) if that's not possible, look into proper dhcp proxies (meaning you have 
machines running dhcp proxy software on each subnet and the one master dhcp 
server talking to them)
C) some crazy ninja shite involving ipaliasing/vlans/tunnels/smart 
routers/etc or something

-- 
Matt Taggart
matt at lackof.org