Not all DHCP options are going through DHCP relay

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On my Win 2000 DHCP server I have option 252 set (wpad option for
autodetecting proxy server). This works fine on my network whose ip range
is 192.168.100.x. We are expanding so we:

Installed a 3Com Layer 4 switch Model 4500
Added VLAN 2
Configured VLAN 1 ip on switch to 192.168.100.253
Configured VLAN 2 ip on switch to 192.168.101.253
Added static routes to switch to route between VLANs
Added scope to DHCP server for 192.168.101.x network.

All works perfectly for VLAN 2 network to get the right IP addresses from
the DHCP server and routing through VLANs is working as well. The only
problem is computers on the new 192.168.101.x network do not seem to be
getting the dhcp option 252 passed to them. None of the clients are
autodetecting the proxy server as they do when the same computers are on the
100.x network.

The computer can reach the proxy server fine if I manually configure IE so
it is not a routing or security issue. Is there something I need to
configure in the switches relay agent to pass option 252?



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