To enable or disable subnet draining on a local DHCPv4 server

Purpose

Perform this procedure to configure IP address draining for a subnet on a local DHCPv4 server. When subnet draining is enabled, the server stops leasing IP addresses from the subnet to new subscriber hosts; existing leases are not affected.

Steps
 
1 

Perform one of the following.

  1. Configure subnet draining on a base routing instance:

    1. Choose Routing from the navigation tree view selector.

    2. Expand Network→NE→Routing Instance.

    3. Right-click on the routing instance and choose Properties. The Routing Instance (Edit) form opens.

  2. Configure subnet draining on a VPRN routing instance:

    1. Choose Manage→Service→Services from the NFM-P main menu. The Manage Services form opens.

    2. Select a VPRN service and click Properties. The VPRN Service (Edit) form opens.

    3. In the navigation tree, expand the Sites object.

    4. Select a routing instance object. The Site (Edit) form opens.

2 

Click on the RADIUS/DHCP/Diameter tab. The Local DHCP Servers tab is displayed.

3 

Select the required DHCPv4 or DHCPv6 server and click Properties. The Local DHCP Server (Edit) form opens.

4 

Click on the IP Address Pools tab.

5 

Select a pool and click Properties. The IP Address Pool (Edit) form opens.

6 

Click on the Subnets tab.

7 

Select a subnet and click Properties. The Subnet (Edit) form opens.

8 

Enable or disable the Subnet Drain parameter and click Apply.

If the Subnet Drain parameter is enabled, the DHCP server stops leasing IP addresses from the subnet.

If the Subnet Drain parameter is disabled, the DHCP server leases IP addresses from the subnet.

9 

Close the forms.

End of steps