Administer > System configuration parameters > Servlet parameters > Parameter: groupsubnetaddress

Parameter: groupsubnetaddress

Startup parameters change the behavior of the Service Manager server. You can always set a startup parameter from the server's operating system command prompt.

Parameter

groupsubnetaddress

Description

This parameter defines the subnet address of a Service Manager server node in a horizontal scaling implementation. It is used to identify a cluster when the system uses multiple network adapter cards.

Service Manager attempts to automatically compute the subnet address from the IP address you provide in the groupbindaddress parameter and the subnet mask of any currently running servlet container processes in the same group. However, if the system cannot automatically compute the subnet address, the server will fail to start and fail to join the group. You can then use this parameter to provide the proper subnet address.

Caution Only provide the subnet address if one of your group members fails to start because the system could not automatically determine the proper subnet address.

Note A subnet address is a computed value derived from a bitwise AND operation on the binary values of the IP address and the subnet mask. You can use an online calculator to compute this value if your network administrator cannot provide it.

It is best practice to place this parameter in the Service Manager initialization file rather than the command line.

Valid if set from

Server's operating system command prompt

Initialization file (sm.ini)

Requires restart of the Service Manager server?

Yes

Default value

None

Possible values

A subnet address on the host system

Example usage

Initialization file: 

groupname:mygroup1
groupbindaddress:192.168.1.2
groupsubnetaddress:192.168.1.0
groupport:13100

Related topics

Servlet implementation
System parameters
Enter a parameter in the sm.ini file
Connection parameters
Servlet parameters