2.10.1 Recommended communication protocol

(1) Recommended communication protocol when running JP1/Base on a physical host only

When running JP1/Base on a physical host only: ANY binding method.

In the ANY binding method, JP1/Base performs communication using only the port number without recognizing an IP address. The communication wait process ensures that data sent to all IP addresses assigned to the host are received. When handling connections, you can send data to hosts on all subnets even if the host uses several subnets.

JP1/Base might not be able to communicate with hosts properly if it is activated using the ANY binding method in a cluster system. For example, a logical host might receive data addressed to a physical host, or vice versa.

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(2) Recommended communication protocol when using a logical host (using a cluster)

When using a logical host (using a cluster):IP binding method

In the IP binding method, if the host uses several IP addresses when two or more IP addresses are assigned to one NIC (Network Interface Card) or one host has more than one NIC, JP1/Base receives only data addressed to a particular IP address. When handling connections, JP1/Base sends data via only an NIC that uses a particular IP address.

When JP1/Base runs in a cluster system, physical and logical hosts might coexist on a single host or two or more logical hosts might be started simultaneously. In such a case, the IP binding method ensures that physical hosts receive only data destined to their IP addresses, and logical hosts receive only data destined to their IP addresses.

By default, the ANY binding method is set as the communication protocol. The IP-binding method is applied to both physical and logical hosts when you set up JP1/Base for a cluster system as shown below:

In Windows, configure JP1/Base for the cluster system by using the GUI (jp1bshasetup.exe) or the command jbs_setup_cluster.

In UNIX, configure JP1/Base for the cluster system by using the command jp1base_setup_cluster.

Note

Once a host is set up for a cluster system, the communication protocol of physical hosts does not return to the ANY binding method even when all logical hosts are removed. To revert to operation using physical hosts only, change the communication protocol back to the ANY binding method by following the instructions in 6.3.2 Changing the JP1/Base communication protocol.

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