HP Netsight manual Defining and Selecting Subnets

Discovering Nodes

NOTE

Although you can define address ranges beginning with 0 and ending with 255 (for example, 132.117.18.0 to 132.117.18.255), devices at the .0 and .255 addresses will not be discovered.

4.If you wish to specify an address mask other than the default value, enter the desired address mask in the Address Mask field.

The appropriate address mask depends upon your network configuration. If your network contains subnets, entering the appropriate subnet mask in this field will identify the network, subnet, and host portions of the IP addresses in the address range. For example, on a Class B network containing an IP address of 132.177.118.24, a subnet mask of 255.255.255.0 would identify the first two octets (132.177) as the network portion of the address, the third octet (118) as the subnet portion, and the final octet (24) as the host portion.

If your network does not contain subnets, entering the appropriate network mask in this field will identify the network portion of the IP addresses in the address range. For example, on a Class B network containing an IP address of 132.177.118.24, a network mask of 255.255.0.0 would identify the first two octets (132.177) as the network portion of the address.

5.Click OK when your entries are complete. The information you entered displays in the appropriate fields in the Address Ranges group box.

6.Repeat this process to define additional address ranges for your script.

NOTE

Each discover script can be configured to query up to 2000 IP addresses; if the number of IP addresses on your network exceeds 2000, you must define and execute multiple Discover scripts.

7.Define your remaining Discover script parameters as explained in the following sections, or click OK to save your entries and return to the Discover Manager window.

Defining and Selecting Subnets

Using the Subnets group box, you can also select entire subnets on which to perform a Discovery. When a Subnet Discovery is executed, the Discover application will query every address in the specified subnet, making it unnecessary to define an IP Address range that encompasses an entire subnet.

Creating and Modifying Discover Scripts 3-7