How to clear the dhcp leases in Cisco Network Registrar

[stefanjansson87]

Hello,

I have a setup with Cisco Network Registrar. We have a few scoops with the lease time set to forever. Now I want to reconfigure the scoops to have a 24h hour leasetime. But before this I would like to clear all the current leases. I have problems doing this. I have tried to delete the scoop and then create a new but the old leases is still there. Does anyone have any ides?

[Nael Mohammad]

You would issue "dhcp-subnet force-available" to make available the whole subnet you specified in the command. Or if you want to do it for a specific lease, you would issue "lease address force-available". And then issue a "lease list -subnet ipaddress mask" to list the current leases.

[stefanjansson87]

How do I do this from the gui?

[stefanjansson87]

I have tried your solution but the cli does not like it. With subnet number I have tried all different ways to specify the subnet I want to use force-available on but It wont work. the "subnet-number" is the subnet I want to clear right? What format does I need to use?

[Nick Lavender]

Same issue here:

nrcmd> dhcp-subnet 10.135.128.0/17 force-available

302 Not Found - dhcp-subnet 10.135.128.0/17 not found

That subnet is configured and viewable on the GUI.

[stefanjansson87]

I did not get it to work. I had to delete each lease in the subnet manually. I suggest you use the batch command to do it.

Just go to the local/bin folder where the cnr is installed and issue the following:

nrcmd -N username -P password -b <"PATH TO FILE"

Just make a textfile with the commands you want to run as a batch like:

lease 10.28.4.1 force-available

You need to do one row for each ip.