IP Helpers…help

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  • #959
    • Total Post: 4
    • Newbie

    Hello all,

    I’ve read repeatedly that we need to put IP helpers on our cisco switches to help with the clients checking in and detecting new clients from the WDM. We’ve tried this and know it works. However we have are being told that putting in these helpers will cause problems with Altiris and it’s PXE and that it will cause problems with the desktop computers that are running the Altiris client. I know this is not the case but I need hard documentation that states what we need to do, if anything, to make the WDM and Wyse clients work on a network already using Altiris. Otherwise said party is going to cause serious problems with a major initiative and render the WDM worthless to us.

    Can anyone help me out here, please?

    Thank you!

    • Total Post: 11002
    • Jedi Master
    • ★★★★★★★

    Adding IP helper are only sending DHCP PXE request from ANY clients to the WDM server. But this is done in addition to any other forwarding.
    So if Altiris is working now, adding IP helpers doesn’t change anything.


    • Total Post: 4
    • Newbie

    That’s what I thought. The problem is that I need “official” documentation such as a white paper to take to management and reassure them that everything will be ok. 🙂

    Thanks for the support!

    • Total Post: 1707
    • Jacked into The Matrix
    • ★★★★★★

    How about the document RFC 4578 “Options for the Intel Preboot eXecution environment (PXE)” 😀

    Seriously, in a mixed Altiris and WDM environment you need to understand a few things:

    – The PXE standard is “first in best dressed”. That is if you have more than one PXE server the client will boot to the first one that responds.

    – Because of this vedors put in controls to only respond to known clients.

    – In the case of Alteris there is a filter, to stop Altiris responding to Wyse clients. Go to Tools > PXE > Filtering and add a exclusion range of MAC addresses for wyse devices 008064000000 – 008064FFFFFF and this will block Altiris responding to Wyse PXE requests. Its been a while so I think this is the correct menu location.

    – For WDM it will ONLY respond to clients that are running the Wyse hagent so WDM will NEVER respond to PC’s

    – You can safly add three servers to the IP helper: ip helper-address dhcpsvr,altirissvr,wdmsvr

    So the normal issue is not that WDM “breaks” Altiris imaging its normally the Altiris tries to manage Wyse devices.

    Now if you want to write up a paper and send it to me I will check it and post it here, is that official enough? Hey, surely “ThinkThin at free wyse monkeys told me so” is enough for management? 8)

    Good question, I hope it helps!

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