leroy at datavoiceint.com
Tue Aug 14 21:12:33 UTC 2018
I am getting a number of messages about "Forward map from <DNS name> to <IP adress> FAILED: Has an address record but no DHCID, not mine. In the logs I'm seeing these messages prior to this:
"updating zone '<DNS zone for above name>/IN': update unsuccessful: <DNS name>: 'name not in use' prerequisite not satisfied (YXDOMAIN)" - using named-compilezone with -j I'm seeing that both an A and TXT record exist (we are using interim as the ddns-update-style).
"updating zone '<DNS zone for above name>/IN': update unsuccessful: <DNS name>/TXT: 'RRset exists (value dependent)' prerequisite not satisfied (NXRRSET)".
As best as I can tell, what is happening is the client is moving from a wired connection to a WiFi connection (for meetings) or vice versa. Initially I was looking for a way to make the MAC address rather than the system name the unique identifier for the system then I came across the update-conflict-detection parameter.
Am I understanding the description correctly, if this parameter is set to off and the client "changes MAC addresses" (due to a switch to/from WiFi) then the dhcp server will remove the previous DDNS entry and replace it with the current one? Are there disadvantages to doing this?
If that isn't the way to handle this situation, how can I make the MAC address (rather than the system name) the unique identifier for DDNS?
Thanks for your help.
at the 2018 Momentum User Conference!
Network Information/Cyber Security Specialist
E: leroy at datavoiceint.com
2220 Bush Dr
TThis message has been sent on behalf
of a company that is part of the Harris Operating Group of
Constellation Software Inc. These companies are listed
If you prefer not to be contacted by Harris
please notify us
This message is intended exclusively for the
individual or entity to which it is addressed. This communication
may contain information that is proprietary, privileged or
confidential or otherwise legally exempt from disclosure. If you are
not the named addressee, you are not authorized to read, print,
retain, copy or disseminate this message or any part of it. If you
have received this message in error, please notify the sender
immediately by e-mail and delete all copies of the
More information about the dhcp-users