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6 Replies

  • Does the dock install a separate network adapter?

    The best course of action is probably going to be to get a dock made for that laptop that supports NIC/MAC address passthrough.

    Spice (3) flagReport
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  • Thanks Big Green Man​ you're reply has many layers. We're considering going with docks made by the same manufacturer of the laptops in question. 

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  • I would make a reservation in DHCP for the computer(s) to always assign it the same address(es).  It won't matter if it falls asleep or is turned off past your DHCP lease time because the DHCP server will only give that IP to that MAC.  You get some of the benefits of a static address with the flexibility of DHCP (if you change DNS servers for example).
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  • I'm confused as to how the IP changing is breaking DNS. What are you using as your DNS server? If it's also your DHCP server, it sounds like the DHCP and DNS services may either be misconfigured or setup to not communicate with one another.

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  • Jrx1216 wrote:

    I'm confused as to how the IP changing is breaking DNS. What are you using as your DNS server? If it's also your DHCP server, it sounds like the DHCP and DNS services may either be misconfigured or setup to not communicate with one another.

    If the record's TTL is short enough, this shouldn't be a problem. If it's not, clients with the old records cached will fail to resolve until their resolver cache is cleared, even if the record is updated on the DNS server.

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  • changes the host address? if the device is dhcp, then it is the server that would change it upon dhcp request if it needs to.
    Is the host only using the dock for network (no othr wired nic, no wifi)?
    What are the dhcp lease times - that is the likely cause.

    I would suggest that Big green Man's  suggestion of making sure DNS is updated is the best resolution to this.

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