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Knowledge Document: DDNS does not work for replacement device

Caroline Oest
 
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You replace a device with a new device but the same hostname or change the network card of an existing device The new device gets an IP address via DHCP but DDNS does not create a new / updated DNS entry

Environment

Open Enterprise Server

Situation

You replace a device with a new device but the same hostname or change the network card of an existing device
The new device gets an IP address via DHCP but DDNS does not create a new / updated DNS entry
You see an entry like this in the DHCP log of the responsible DHCP server 
/var/log/dhcpd.log
2024-06-05T11:47:11.897771+02:00 dhcpserver01 dhcpd[12525]: Forward map from printer01.test.lab to 10.150.160.11 FAILED: Has an address record but no DHCID, not mine.

Cause

The DNS entry does already exist but has a different identifier. This prevents the entry from being updated
Find resolution on support portal

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Comment List
  •  

    That strikes me as a Work Around rather than a Resolution for a normal enough situation, and might explain oddities I have seen.  Now I have a possible smoking gun to add to the investigate queue. Certainly, the managing of workstations such as replacing NICs (well, system board nowadays) and systems is a separate role than managing DNS or servers, so that "resolution" requires 2 or 3 roles, that in larger orgs, are separate people or even teams.

    ________________________

    Andy of KonecnyConsulting.ca in Toronto
    Please use the "Like" and/or "Verified Answers" as appropriate as that helps us all.

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