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  • 1.  issue with dhcp snooping and windows wds server

    Posted Jun 08, 2009 04:24 AM

    Hi there
    We have installed bunches of 2650 switchs on the edge of our network.
    all these switches are impleting the dhcp-snooping
    here is the config
    DHCP Snooping Information

    DHCP Snooping : Yes
    Enabled Vlans : 10 15-16 21-22 24 26 28 31 33 50 60 70 100 103 110 120 130 140 160-161 190

    Verify MAC : Yes
    Option 82 untrusted policy : drop
    Option 82 Insertion : No

    Store lease database : Yes
    URL : tftp://157.159.21.31/switchs/switch-B01
    Read at boot : no
    Write delay : 300
    Write timeout : 300
    File status : delaying
    Write attempts : 4
    Write failures : 3
    Last successful file update : Mon Jun 8 09:02:14 2009


    Port Trust
    ---- -----
    1 No
    .........
    49 Yes
    50 No

    The dhcp snooping is working well.
    We have installed a WDS server on the same network and in the same physical location than the DHCP server.

    But the installation with wds failed. we got the following message on the client console

    file: \boot\bcd

    status: 0xc000000f

    Info: An error occured while attempting to read the boot configuration data.

    When i disable the dhcp snooping it works quite good.

    i have some question on how dhcp snooping work.

    i haven't put any dhcp server on the authorized section. then can i use several dhcp server as long as they answer from the trusted port?

    WDS use some weird options to pass information to the client. Especially it uses option 252. does dhcp snooping remove that kind of information?

    Thanks for any help. I would prefer not remove the dhcp snooping from my switch.

     

     

    P.S. This thread has been moved from Switches, Hubs, Modems (Legacy ITRC forum) to ProCurve / ProVision-Based. - Hp Forum Moderator


    #DHCP


  • 2.  RE: issue with dhcp snooping and windows wds server

    Posted Jun 08, 2009 04:53 AM
    windows deployment service use Pre-Boot Execution Environment (PXE)dhcp feature

    there fore wds server port must be trust port


  • 3.  RE: issue with dhcp snooping and windows wds server

    Posted Jun 11, 2009 02:40 AM
    Well my wds server is on a trusted port.

    it seems that the dhcp answer from the wds server are "cleaned" by the dhcp snooping mechanism.


  • 4.  RE: issue with dhcp snooping and windows wds server

    Posted Feb 06, 2015 04:41 PM

    Did you find a solution?



  • 5.  RE: issue with dhcp snooping and windows wds server

    Posted Jul 13, 2015 07:52 PM

    Use dhcp-snooping authorized-server command and specify the ip adresses of your WDS servers