Netbooting Trouble with 712/100

["aaron%zadzmo.org@localhost" <aaron%zadzmo.org@localhost>]

Hello all:

I'm trying to netboot an HP 712/100 but it's giving me trouble. This network is
having no trouble booting sparc64, alpha, and amd64 machines but this HP just
won't go.

The typical attempt looks like this on the wire:

23:55:44.355576 0.0.0.0.68 > 255.255.255.255.67: xid:0x500eae02 [|bootp]

23:55:44.363792 192.168.102.1.67 > 192.168.102.8.68: xid:0x500eae02
Y:192.168.102.8 S:192.168.102.1 [|bootp] (DF)

23:55:46.364620 0.0.0.0.68 > 255.255.255.255.67: xid:0x500eae02 secs:2 [|bootp]

23:55:46.372827 192.168.102.1.67 > 192.168.102.8.68: xid:0x500eae02 secs:2
Y:192.168.102.8 S:192.168.102.1 [|bootp] (DF)

23:55:51.373736 0.0.0.0.68 > 255.255.255.255.67: xid:0x500eae02 secs:7 [|bootp]


If I run 'search' on the boot admin menu of the HP, it gives me the IP address
of the DHCP server, so I know it's receiving traffic. It just won't "go" for
some reason, and I'm not seeing any error or diagnostic messages outside of
'boot failed'.

Any ideas or well known gotchas?