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Configuring and Managing Interactive Devices 11-7
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