Configuring an Interactive Device for LAT Sessions

Authentication in Chapter 21 for details.

Specifying Failover

If a LAT service node suddenly becomes unavailable during a session, the access server searches for another LAT service node that offers the same service. If the access server finds one or more suitable nodes, it attempts to connect to the service on the node with the highest service rating. This process is called failover.

When used with a VAXcluster computer network, failover provides a flexible terminal connection to the VAXcluster service.

This feature can be disabled on each port.

Example: Disabling Port Failover

The following example shows how to disable failover on port 2:

Local> CHANGE PORT 2 FAILOVER DISABLED

Configuring Port Queuing

When a user on the access server tries to connect to a busy service on an access server, the Port Queuing characteristic allows the connect request to be queued. The service must be on an access server, either the same one as the user’s or a different one.

The queuing of the connect request also depends on whether the access server offering the service has reached its queue limit or has queuing disabled. In this case, the connection is not queued and the user receives a message that indicates that service is not available.

If the access server offering the service has queuing enabled and has not reached its queue limit, the request is queued. If more than one access server offers the service, your access server will attempt to connect to the target access server that has the highest service rating. For access servers that offer queuing, service ratings are higher for access servers that have the greatest number of open positions in their connection queues.

If the port queuing characteristic is disabled, your access server cannot request a queue connection when a service is busy. Therefore, if the service is busy, your user receives a message that indicates that service is not available.

The factory-set default is disabled.

Example: Enabling Queuing on a Port

This example shows how to enable queuing on port 5:

Local> CHANGE PORT 5 QUEUING ENABLED

Configuring and Managing Interactive Devices 11-7

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HP NetRider manual Specifying Failover, Configuring Port Queuing, Example Disabling Port Failover