Configure the core group bridge service

The core group bridge service can be configured to establish communication between core groups. A core group is a statically defined component of the high availability manager. To configure communication between core groups, use an access point group. An access point group is a collection of core groups that communicate with each other.

Before you configure a core group bridge service, become familiar with the content of the following topics:

• Core groups, which describes the functionality of a core group.

• Create a new core group (high availability domain), which describes how to configure a core group.

• Configure communication between core groups that are in the same cell, which describes how to configure communication between core groups that are in the same cell.

• Create advanced core group bridge configurations, which describes how to configure two or more core groups, such that the members of each core group can communicate with the members of the other core groups, even if one or more of the other core groups resides outside of a firewall.

We must configure the core group bridge service whenever two or more core groups are configured in the same cell. We must also configure the core group bridge if we need to share traffic among core groups that are in different cells. Configure the core group bridge to communicate between cells only when the service is required by another product component. By configuring the core group bridge service, the availability status of the servers in each core group is shared among all the configured core groups. We can configure core groups to communicate in the following ways:

• Configure the core group bridge service for communication between two core groups that are in the same cell. We can configure each core group to communicate with one or more of the other core groups in the cell.

• Configure the core group bridge service for communication between two core groups that are in different cells. We can configure the core group in one cell to communicate with a core group in the other cell.

• Configure the core group bridge service for communication within the cell, and outside of the cell.

• Configure the core group bridge service for communication using a tunnel peer access point. This is the type of communication that configure if you are using a DMZ Secure Proxy Server for IBM WebSphere Application Server.

Results

Multiple core groups can communicate with each other.

What to do next

Continue configuring the high availability environment.

Subtopics

• Core group communications using the core group bridge service
  The core group bridge service can be configured to share availability information about internal product components between core groups. For example, by configuring the core group bridge service, each core group can be aware of the status of all of the application servers configured in all of the core groups. Use access point groups to define the core groups that communicate. Do not use the core group bridge service to share application information among core groups.

• Configure communication between core groups that are in the same cell
  Use this task to configure communication between core groups that are in the same cell.

• Configure core group bridge communication between cells containing multiple core groups
  We might need to configure core group bridge communication between cells containing multiple core groups if one of the cells contains processes that need access to the high availability manager state information of processes that are running in a different cell. For example, a WAS proxy server or an On Demand Router might need to route requests to cluster members in a different cell and that other cell contains multiple core groups.

• Configure core group communication using a proxy peer access point
  Use this task to configure communication between two core groups when they cannot communicate with each other directly through peer ports.

• Configure communication with a core group that resides on a DMZ Secure Proxy Server for IBM WebSphere Application Server
  This task describes the steps that perform to establish communication between a cell inside of a firewall, and a DMZ Secure Proxy Server for IBM WebSphere Application Server outside of the firewall.

• Configure the core group bridge between core groups that are in different cells
  Use this task to configure communication between core groups that are in different cells.

• Core group bridge settings
  The core group bridge is the service that enables communication between core groups. A core group is a statically defined component of the high availability manager. Use this page to view the structure of the access point groups and tunnel access point groups.

• Core group bridge custom properties
  Use these custom properties for advanced configurations for core groups and core groups that communicate with the core group bridge.

Related tasks

Create a new core group (high availability domain)

Set up a high availability environment