Creating subnet entries

Once you have defined a top-level address entry, you can add subnets to it, or you can further divide a subnet into other subnets (known as variable length subnetting). See ``Variable length subnetting'' for more details.

To add a subnet:

1. Select the top-level address or subnet.

2. Select Edit Add Subnets.

3. Choose a subnet mask length (in bits) from those listed in the Length column.

4. Select subnet ranges from those listed in the Subnet column.

   The Subnet column displays the mask length of the subnet and also displays the number of hosts and host ranges.

   For a particular subnet mask length, you can select all the subnet ranges in the list by clicking on Select All.

5. Click on Yes to automatically assign hosts to subnets.

   You can also add hosts after you have assigned all the subnets. See ``Creating host entries''.

6. Click on OK.