The TCP stanza

This stanza specifies network protocol configuration parameters. They override the default attributes for channels.

Note:

Only attributes representing changes to the default values need to be specified.

TCP

The following attributes can be specified:

Port=1414|port_number

The default port number, in decimal notation, for TCP/IP sessions. The well known port number for WebSphere MQ is 1414.

KeepAlive=NO|YES

Switch the KeepAlive function on or off. KeepAlive=YES causes TCP/IP to check periodically that the other end of the connection is still available. If it is not, the channel is closed.

ListenerBacklog=number

When receiving on TCP/IP, a maximum number of outstanding connection requests is set. This can be considered to be a backlog of requests waiting on the TCP/IP port for the listener to accept the request. The default listener backlog value for OS/400 is 255; the maximum is 512. If the backlog reaches the value of 512, the TCP/IP connection is rejected and the channel cannot start.

For MCA channels, this results in the channel going into a RETRY state and retrying the connection at a later time.

For client connections, the client receives an MQRC_Q_MGR_NOT_AVAILABLE reason code from MQCONN and should retry the connection at a later time.

The

ListenerBacklog attribute allows you to override the default number of outstanding requests for the TCP/IP listener.