CA IDMS DDS System Generation › CA IDMS DDS Ports

CA IDMS DDS Ports

A CA IDMS DDS port is defined during system generation with a LINE and PTERM pair. A port represents an access point through which the node passes request and response packets to another node. Each node in a network can be connected to any number of other nodes.

DC/UCF system generation statements include clauses specific to the CA IDMS DDS that allow the administrator to specify characteristics about the port. Through the definition of these ports, the administrator defines some of the characteristics of the network and controls data transmission through the network.

Depending on the access method selected for the communication between the nodes, different types of LINEs and PTERMs must be defined in the DC/UCF systems on the two nodes. The following are the list of specific definitions required for each access method:

CCI access method

• LINE definitions: on both systems, a CCI LINE must be defined.
• PTERM definitions: on both systems, one BULK PTERM for eachconnection must be defined.

TCP/IP access method

• LINE definitions: on both systems, a SOCKET LINE must be defined.
• PTERM definitions: on the local system, a DDSTCPIP PTERM pointing tothe target system must be defined; on the remote system, a LISTENER PTERM and one BULK PTERM for each connection must be defined.

VTAM access method

• LINE definitions: on both systems, a DDS LINE must be defined.
• PTERM definitions: on the local system, a VTAM PTERM pointing to thetarget system and one BULK PTERM for each connection must be defined; on the remote system, one BULK PTERM for each connection must be defined.
  
  The characteristics of CA IDMS DDS LINEs and PTERMs are discussed separately in the following paragraphs.