Remove secondary DNS server from UCM 8.6

[James Hawkins]

Hi,

My customer has disabled one of their DNS servers which is currently used as the secondary DNS on CUCM.

They are not replacing this server and will run with just a single DNS server (I do not think this is a good idea but they seem set on doing it).

Is there any way to remove the secondary DNS entry from UCM? - there does not seem to a CLI option to do this.

I have tried setting the secondary to 0.0.0.0 and to the IP address of the primary DNS but these options both fail as shown below.

admin:set network dns secondary 0.0.0.0

Executed command unsuccessfully

0.0.0.0 is an invalid IP address.

admin:set network dns secondary 10.1.1.100

Executed command unsuccessfully

10.1.1.100 is already a configured DNS IP address.

Does anyone know any way of clearing the secondary DNS server entry?

Thanks

[Harmit Singh · Accepted solution]

Hi James,

Command is: delete dns

Example:

admin:delete dns 10.104.149.89

     ***   W A R N I N G   ***

This will cause the system to temporarily lose network connectivity

Continue (y/n)?y

trying to restart network...

admin:

You can use the above command for primary or secondary DNS.

HTH.

Regards,

Harmit.