NIC driver update clear the DHCP User Class ID?

Zoltán AMBRÓZ 1 Reputation point
2021-02-17T16:41:32.25+00:00

After update (WSUS) client side NIC driver, the DHCP Users Class info are lost.

Windows 10 Network
Windows 10 Network
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Network: A group of devices that communicate either wirelessly or via a physical connection.
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  1. Candy Luo 12,656 Reputation points Microsoft Vendor
    2021-02-18T02:24:05.413+00:00

    Hi ,

    How did you check the DHCP User Class ID are lost? Could you please clarify more details? You can check the DHCP class ID on the client with "ipconfig /showclassid *".

    NIC driver update clear the DHCP User Class ID?

    Did this affect on all clients or only on specific one?

    Can you reconfigure the classid on the client with ipconfig /setclassid command?

    Best Regards,

    Candy

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  2. Zoltán AMBRÓZ 1 Reputation point
    2021-02-18T12:00:17.41+00:00

    Hi,
    thanks for the reply.

    1. How did you check the DHCP User Class ID are lost? - Clients did not receive an IP address appropriate for the user class
    2. Could you please clarify more details? - See 1)
    3. You can check the DHCP class ID on the client with "ipconfig /showclassid *" - I have not tried
    4. Did this affect on all clients or only on specific one? - All clients
    5. Can you reconfigure the classid on the client with ipconfig /setclassid command? - Yes
      Best regards,
      Zoltan
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  3. Candy Luo 12,656 Reputation points Microsoft Vendor
    2021-02-19T02:55:36.79+00:00

    Did this affect on all clients or only on specific one? - All clients

    What's the Network Card model and driver version? If all clients are using same NIC Adapter and Driver Version, I would suspect this specific network card will filter out DHCP Users Class info.

    If possible , please test other brand of network cards to see if the same problem exists.

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  4. Zoltán AMBRÓZ 1 Reputation point
    2021-02-19T15:41:09.673+00:00

    Multiple NICs, for example:
    Realtek PCIe FE Family Controller - 10.26.1003.2017
    Realtek PCIe GBE Family Controller - 10.32.1206.2018
    Intel ® Ethernet Connection I219-V