Visara LINCS Features - Manual (Page 55)

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Chapter 5. Host Connectivity
707021-001
Alerts are queued within LINCS until the protocol allows them to be transmitted to the host. If
an event occurs while LINCS already has an event queued, the priority of the new event is
compared against the priority of the old event. If the second event has higher priority, the first
Alert is lost. If the second event has equal or lower priority, the second Alert is lost.
LINCS is designed to transmit the maximum possible number of Alerts. NetView filtering
determines which Alerts are significant.
Operator Initiated Alert Messages
Operator initiated Alert messages provide a means to report unusual events to the NetView
operator. This function is supported on all control unit terminals (CUTs). Refer to the
Configuration and Central Control manual for information about using Operator Initiated Alerts.
Configuration and Management for SNA Alerts
Configuration – The SNA Alert feature is enabled on the 3270 Host Profiles panel(s) under
SNA Options. A 3270 Host Profile with SNA Alert enabled may be assigned to the desired
host circuits on the 3270 Host Circuits panels.
Management – The Network Management Menu in Central Control Mode contains the
“Operator Initiated Alert” utility which may be used by authorized users to send user-defined
alert messages to an SNA host. This utility should be used to call attention to unusual situations.
Request Maintenance Statistics
A LINCS node supports the Request Maintenance Statistics (REQMS) command to SNA
Host Circuits. This REQMS command requests summary error counts and configuration
information from the Host Circuit and stores the data in NetView’s Hardware Monitor data
base. The NetView operator can then view the stored maintenance statistics.
When an SNA Host Circuit has received a REQMS command, a RECFMS (Record Formatted
Maintenance Statistics) command is formatted with summary counters to send inbound to the
host system. Four different RECFMS response types are supported:
• Type 1 – Link Test Statistics – The link test statistics indicate the number of times the Test
command has been received and transmitted.
• Type 2 – Summary Counters – The summary counter statistics record the number of machine
checks, communications checks, and program checks that have occurred on the Host Circuit.
• Type 3 – Communication Adapter Data Error Counters – Type 3 statistics are kept for
communication errors, such as overruns, underruns, command rejects, etc.
• Type 5 – Configuration and Patch Information – Two different formats are supported for
type 5:
• Format 1 – Configuration Information – Upon receipt of this command, LINCS returns
the current configuration information.
• Format 2 – RPQ and Patch Information – This returns information about any RPQs or
patches that are present. If none are present, nulls are returned.