HP NetRider Introduction, Keepalive Timer Example, KEEPALIVE TIMER Characteristic, Keepalive Timer Default Values

KEEPALIVE TIMER Characteristic

KEEPALIVE TIMER Characteristic

Introduction

The KEEPALIVE TIMER characteristic maintains a virtual circuit between the access server and service node when no messages are exchanged over a period of time. If the keepalive timer expires, the access server sends a message to determine if the service node is still reachable. If the service node fails to respond, the access server can time out the virtual circuit.

Keepalive Timer Default Values

The keepalive timer value is a trade-off between fast circuit-down detection and unnecessary network traffic. The factory-set default value of 20 seconds represents a good compromise. For a heavily loaded Ethernet, use a value from 60 to 180. For applications that require quick notification of a service node failure, use 10 seconds.

Keepalive Timer Example

The following example shows how to change the keepalive timer to 10 seconds:

Local> CHANGE SERVER KEEPALIVE 10

6-8 Configuring LAT Characteristics