HP NetRider manual Circuit Timer Characteristic, Changing the Circuit Timer

CIRCUIT TIMER Characteristic

CIRCUIT TIMER Characteristic

Introduction

The CIRCUIT TIMER characteristic defines the interval at which the access server sends virtual circuit messages to the LAT service node. This value is important for balancing fast response time and network utilization against optimal service node performance.

The circuit timer value ranges from 30 to 200 milliseconds. The default is 80 milliseconds, which is recommended for normal interactive functions.

Changing the CIRCUIT TIMER

To change the circuit timer, use the command shown in the following example:

Local> CHANGE SERVER CIRCUIT TIME milliseconds

Increasing the CIRCUIT TIMER

As you increase the circuit timer value, the LAT protocol overhead decreases on the access server, service node, and network. A slower terminal response time, however, is the trade-off for any increased circuit timer value.

Decreasing the CIRCUIT TIMER

If you reduce the circuit timer value, the access server port buffers are less likely to fill between virtual circuit messages. If you have a file transfer with no flow control between a port and a device, a lower circuit timer value can mean fewer data overrun errors at the port. Therefore, a reduced circuit timer value may enable file transfers to run at increased speeds.

6-6 Configuring LAT Characteristics