DHCP auto discovery with DHCP relay agent on ISA not working

Hi all,

I'm having trouble getting dhcp based auto discovery to work on my network.
I have followed the steps in
http://www.isaserver.org/tutorials/Configuring-WPAD-Support-ISA-Firewall-Web-Proxy-Firewall-Clients.html
but i think there is an issue with auto discovery and DHCP relay agents on
the ISA.

What i have:

<DHCP server on network 1 > --------[ (1) ISA (2) ]---------<client on
network 2>

The client does his DHCP inform as i can sniff the packets on the client
side and the ISA (2) Interface.

However i see no packets going in or out of the ISA (1) interface for DHCP.

I know the DHCP relay agent in installed correct on the ISA system as
getting an IP address is not a problem.

I have read the MS kb
http://technet.microsoft.com/nl-be/library/cc302643(en-us).aspx#DHCPWPADIssues but this does not seem to help.

Does anyone know how to solve this and is there a sollution?

I don't want to use DNS as I have more networks and ISA's on my LAN and WAN
and i want to make ISA discovery SUBNET linked.

My ISA box is running ISA 2006 fully patched and Windows 2003 SP2 fully
patched.

many thanks,

_____________________________

Tom Decaluwé
MCSE 2000/2003 - CCNA
http://www.it-talks.be
.

Relevant Pages

  • Re: Any Way to Pass DHCP From Internal to Perimiter?
    ... WON'T BE a separate network. ... Regardless of the above DHCP operations are confined to the "physical" ... subnet where the DHCP server resides. ... DHCP relay service on your ISA server itself, then of course you will have ...
    (microsoft.public.isa)
  • Re: DHCP from LocalHost
    ... entities on the network are controlled through the System Policy. ... You need to edit the System Policy on your ISA machine, enable the DHCP ... > from my internal network to travel through to my perimeter network. ...
    (microsoft.public.isa)
  • Re: DHCP problem
    ... noticing this problem myself within my SBS 2000 network. ... I need dhcp running because of the SBS ... assume ISA is doing its job. ... leases are random, not sequential. ...
    (microsoft.public.backoffice.smallbiz2000)
  • Re: ISA Server stops DHCP from leasing ip addresses to clients
    ... You should have 2 DHCP rules listed in ISA. ... to contact DHCP server problem' which might have given the answer, ... The config of the network is simple. ...
    (microsoft.public.windows.server.sbs)
  • Re: ISA Server stops DHCP from leasing ip addresses to clients
    ... Paul-the ISA 2004 LAT must include the correct .255 address to allow DHCP ... to contact DHCP server problem' which might have given the answer, ... The config of the network is simple. ...
    (microsoft.public.windows.server.sbs)
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