Port health – Brocade Monitoring and Alerting Policy Suite Administrators Guide (Supporting Fabric OS v7.3.0) User Manual
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In addition to being able to set alerts and other actions based on these categories, the MAPS
dashboard displays their status. Refer to
on page 75 for information on
using the MAPS dashboard.
Port Health
The Port Health category monitors port statistics and takes action based on the configured thresholds
and actions. You can configure thresholds per port type and apply the configuration to all ports of the
specified type. Ports whose thresholds can be monitored include physical ports, D_Ports, E_Ports,
F_Ports, and Virtual E_Ports (VE_Ports).
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, D_Ports, E_Ports, and F_Ports.
The following table describes the monitored parameters in this category. In the “Monitored parameter”
column, the value in parentheses is the value you can specify for the mapsRule -monitor parameter.
Port Health category parameters
TABLE 6
Monitored
parameter
Description
Cyclic redundancy
check (CRC with
good EOF (crc
g_eof) markers)
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.
Port Health
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Monitoring and Alerting Policy Suite Administrator's Guide
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