Select the version of a core group protocol

There are two major categories or groups of high availability manager protocols. Both of these protocol groups can be independently configured to use newer versions of the protocols.

Before you change the version of a core group protocol for a particular core group member, make sure that:

• we are familiar with the content of the Core group protocol versions topic. This page contains information that is helpful in identifying:

  • Which protocol category you want to configure.

  • The custom property that use to configure this protocol category.

• You use the tables that are included in the Core group protocol versions topic to determine in which releases or service packs each protocol version was added to WAS ND.

• You verify that each member of the core group is running at a product code level (VRM) that supports the new protocol version. The code level must be equal to or greater than the code level in which this protocol version was added to WAS ND. All core group members with which the new protocol version is associated must support that protocol version.

The high availability manager can use any supported core group protocol versions. However, to ensure that proper communication continues between all core group members, make sure that all member of a particular core group use the same version of a core group protocol.

To change the version of a core group protocol complete the following steps.

 

1. In the admin console ...

   Servers > Core Groups > Core group settings and select an existing core group.

2. Under Additional Properties, click Custom properties.

3. Change the value of either the IBM_CS_WIRE_FORMAT_VERSION or IBM_CS_HAM_PROTOCOL_VERSION custom property.

   If updating the updating the lower level protocols, which are also referred to as the updating the lower level wire format protocols, change the value of the IBM_CS_WIRE_FORMAT_VERSION custom property.

   If updating the higher level protocols, which are also referred to as the high availability manager protocols, change the value of the IBM_CS_HAM_PROTOCOL_VERSION custom property.

   To update either of these custom properties, complete one of the following substeps:

   1. If the property to update does not already exist, click New and then specify either IBM_CS_WIRE_FORMAT_VERSION or IBM_CS_HAM_PROTOCOL_VERSION in the Name field and the appropriate version ID in the Value field.

   2. If the property that we need to update already exists, click on the property name, and specify the appropriate version ID in the Value field.

4. Click OK, and then click Review.

5. Select Synchronize changes with nodes, and then click Save.

 

Results

After synchronization completes, the high availability manager automatically detects the configuration changes and starts to use the new core group protocol version with these core group members.

 

Related concepts

Core group protocol versions

 

Related tasks

Set up a high availability environment

 

Related

Core group custom properties