The high availability manager supports multihomed hosts, which means that WebSphere Application Server processes can communicate with each other even if they are running on different versions of the product. If you are running Version 6.0.1.2 processes that need to communicate with each other, there are high availability manager-related issues that you need to consider.
Before you begin
Know the version levels of the processes that need to communicate with each other. If no V6.0.1.2 processes exist, see Interoperating with Version 6.0.2 and later processes .Why and when to perform this task
In Version 6.0.1 without Fix Pack 2 installed, an acceptable value for the DCS_UNICAST_ADDRESS host name field is either a host name, for example, myhost.mydomain, or a textual IP address, for example, 192.168.0.2. If a host name is specified, Domain Name Services (DNS) is used to resolve the host name to an IP address. If the host supports multiple IP addresses, where the host name has multiple mappings in DNS, a host name is ambiguous and a textual IP address is required.After the installation of Version 6.0.1 Fix Pack 2, the asterisk is recognized as a valid value for the DCS_UNICAST_ADDRESS host name field. When this field is set to an asterisk, multihome support allows the high availability manager to open and receive connections on all IP addresses available for the host.
Therefore, careful planning is necessary before converting processes to type 3 processes.
To enable interoperating with Version 6.0.1.2 processes:
Steps for this task
Result
All of the processes can communicate with each other.What to do next
After multihome support is enabled, all of the new nodes that are added to the installation must have multihome support enabled. The base Version 6.0.1 code and Version 6.0.1 Fix Pack 2 must be installed before profiles are created and the node is added. If this procedure is not observed, manual configuration is required to enable the processes to connect.HMGR0024W: An error was encountered while looking up the IP address for the host name of a core group member. The host name is * and the server name is myCell01\myCellManager01\dmgr. The member will be excluded from the core group.
HMGR0218I: A new core group view has been installed. The core group is defaultCoreGroup. The view identifier is (8:0.spoletoCell01\ spoletoCellManager01\dmgr). The number of members in the new view is 2.
Related referenceConfiguring a core group transport