Performance Considerations

If you use multiple sessions in a high-speed and high-load configuration with an SDLC attachment, the connection to the host might fail. In this case, set the host’s timeout value to be greater than that of Personal Communications.

To change the host timeout value, modify the following NCP parameters:
REPLYTO

The maximum duration in seconds that the host waits for a reply from the terminal. The default is 1 second.

RETRIES=(m,t,n)
The number of recovery attempts for errors occurring during transmission over the link. Repetitive retries are called a retry sequence. The maximum number of retries is specified as m, which can be from 0 to 128. NCP pause (the time between the retry sequences) is specified as t and can be from 1 to 255 seconds. The maximum number of retry sequences is specified by n and can be from 1 to 127. For example:
```
   REPLYTO=1, RETRIES=(3,4,5)
   (( 1(seconds) x 3(times) + 4(seconds)) x 5(times)
   = 35 (seconds)
```
Note:
In this example, the host waits 35 seconds for the terminal to reply.
For more details, ask your system personnel.
To change the Personal Communications timeout value, type a new value in the Inactivity timer field on the Performance page of the Connections property sheet in SNA Node Configuration.
The value is in seconds and can be from 40 to 160. The default is 80.