Technical data

Monitoring and Alerting Policy Suite Administrator’s Guide 13
53-1002933-02
MAPS monitoring categories
3
The Port Health category also monitors the physical aspects of a small form-factor pluggable (SFP)
transceiver, such as voltage, current, receive power (RXP), transmit power (TXP), and state changes
in physical ports, E_Ports, FOP_Ports, and FCU_Ports. Table 5 lists the monitored parameters in
this category and provides a brief description for each one. In the Monitored parameter column, the
value in parentheses is the value you can specify for the mapsRule -monitor parameter.
TABLE 5 Port Health category parameters
Monitored parameter Description
Cyclic redundancy check
(CRC)
The number of times an invalid cyclic redundancy check error occurs on a port or a
frame that computes to an invalid CRC. Invalid CRCs can represent noise on the
network. Such frames are recoverable by retransmission. Invalid CRCs can indicate
a potential hardware problem.
Invalid transmission words
(ITW)
The number of times an invalid transmission word error occurs on a port. A word did
not transmit successfully, resulting in encoding errors. Invalid word messages
usually indicate a hardware problem.
Sync loss (LOSS_SYNC) The number of times a synchronization error occurs on the port. Two devices failed
to communicate at the same speed. Synchronization errors are always
accompanied by a link failure. Loss of synchronization errors frequently occur due
to a faulty SFP transceiver or cable.
Link failure (LF) The number of times a link failure occurs on a port or sends or receives the Not
Operational Primitive Sequence (NOS). Both physical and hardware problems can
cause link failures. Link failures also frequently occur due to a loss of
synchronization or a loss of signal.
Signal loss (LOSS_SIGNAL) The number of times that a signal loss occurs in a port. Signal loss indicates that no
data is moving through the port. A loss of signal usually indicates a hardware
problem.
Protocol errors (PE) The number of times a protocol error occurs on a port. Occasionally, protocol errors
occur due to software glitches. Persistent errors occur due to hardware problems.
Link reset (LR) The ports on which the number of link resets exceed the specified threshold value.
Class 3 time outs (C3TXTO) The number of Class 3 discards frames because of time outs.
State changes (STATE_CHG) The state of the port has changed for one of the following reasons:
• The port has gone offline
• The port has come online
• The port is faulty
SFP current (CURRENT) The amperage supplied to the SFP transceiver. Current area events indicate
hardware failures.
SFP receive power (RXP) The power of the incoming laser in microwatts (µw). This is used to help determine if
the SFP transceiver is in good working condition. If the counter often exceeds the
threshold, the SFP transceiver is deteriorating.
SFP transmit power (TXP) The power of the outgoing laser in microwatts (µw). This is used to help determine if
the SFP transceiver is in good working condition. If the counter often exceeds the
threshold, the SFP transceiver is deteriorating.
SFP voltage (VOLTAGE) The voltage supplied to the SFP transceiver. If this value exceeds the threshold, the
SFP transceiver is deteriorating.
SFP temperature
(SFP_TEMP)
The temperature of the SFP transceiver in degrees Celsius. A high temperature
indicates that the SFP transceiver may be in danger of damage.
SFP power on hours
(PWR_HRS)
The number of hours the SFP transceiver is powered on.