Changing a core group's configuration

You might want to perform this task if you need to:

• Change the number of coordinators that are to be active.

• Change the transport type for the core group members.

• Set up some custom properties for your specific environment.

• Add or remove application servers from the list of preferred coordinator servers.

To change a core group's configuration:

1. In the administrative console, click Servers > Core groups > Core group settings > core_group_name.

2. If you want to change the number of coordinators that must be active for this core group, specify a new value in the Number of coordinators field.

3. If you want to change the transport specification for this core group, in the Transport type pull-down, select the type of transport the application servers in this core group are going to use.

   1. If you select CHANNEL_FRAMEWORK , specify the name of the channel chain in the Channel chain name field.

   2. If you select MULTICAST , enter the multicast port number in the Multicast port field, enter the first IP address in the range of IP addresses that can be used in the Multicast group IP start field, and enter the last IP address in the range of IP addresses that can be used in the Multicast group IP end field.

4. If you need to set up a custom property for your specific environment, click Custom properties > New and then specify the name and value pair of your custom property.

5. If you need to change the list of preferred coordinator servers, click Preferred coordinator servers and then add or delete the appropriate
   application servers from the list of preferred coordinator servers.

6. Click Save , select Synchronize changes with Nodes and then click Save again to save your changes.

Related concepts
High availability manager
Core groups
High availability groups

Related tasks
Adding members to a core group

Related reference
Core group and core group bridge custom properties