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Data Monitoring - Server Subnet Properties

View and manage the server subnet properties, for example, to exclude a particular server, or to specify a default network type for the /32 client networks that the management console automatically creates from matching server traffic.

Frequently Asked Questions

• How should I define a server subnet? Add server subnets that closely align with your server VLAN definitions. A properly-defined server subnet provides the management console with the flexibility that is required to keep a user-defined application up-to-date. When you assign a server subnet to an application, the management console monitors the application as the servers which host the application change.
• Why add an exclusion to a server subnet? To prevent the management console from monitoring particular servers that match the specified server subnet, add an exclusion.
• Why does the management console add matching servers in the Network List? To enable the management console to monitor a multi-tier application where a server initiates client requests to another server, the management console automatically creates a /32 client network for each IPv4 server, respectively. When a monitoring device observes server traffic that matches a specified server subnet, the management console automatically adds the server to the Server List and adds a /32 client network, with the network type you specify, to the Network List.

Property Details

Complete the following fields:

Server Subnet Name

Lists details about the server subnet, such as the server VLAN traffic that can be monitored by the server subnet.

IP address and subnet mask

Specifies the range of server IP addresses to monitor:

IPv4 server subnet

Use the following format for IPv4 addresses: x.x.x.x/n, where x.x.x.x is the IPv4 subnet address in dotted notation and n is the number of bits to use for the mask.

Network Type

(Optional) Specifies the network type that you want the management console to assign to corresponding /32 client networks that are created from matching server traffic.

If you do not specify a network type, it is set to Unassigned.

Exclusions

(Optional) View and manage the list of server exclusions for the server subnet. All monitoring devices ignore traffic on the server subnet that matches an exclusion. Edit a server subnet to add an exclusion; you cannot add an exclusion when you add a server subnet.

Add Exclusion

(Optional) Click to add an exclusion to filter a range of server IP address from the specified server subnet. For example, add an exclusion to filter the 191.168.2.2/32 server from the 191.168.2.0/24 server subnet.

More information:

How /32 Client Networks Work

How Applications Work

Group Client Networks by Network Type