Brocade Network Advisor SAN User Manual v12.1.0 - Manual (Page 1215)

1168 Brocade Network Advisor SAN User Manual
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MAPS monitoring categories
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MAPS monitoring categories
MAPS enables you to monitor the independent components that are listed in this section by
creating policies. Policies are a series of rules that define thresholds for measures and actions to
take when a threshold is triggered.
Port monitoring category
The Port 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. Configurable ports include physical ports, E_Ports, optical F_Ports (FOP_Ports),
copper F_Ports (FCU_Ports), and Virtual E_Ports (VE_Ports).
The Port category also monitors the physical aspects of an SFP transceiver, such as voltage,
current, RXP, TXP, and state changes in physical ports, E_Ports, FOP_Ports, and FCU_Ports.
Table 108 lists measures in the Port category and describes each measure.
TABLE 108 Port measures
Measure 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 the port sends or
receives a Not Operational Sequence (NOS) state. 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 error (PE) The number of times a protocol error occurs on a port. Invalid state due to
link reset response sequence (LRR) on an online link. Occasionally these
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 timeouts (C3TXTO) The number of Class 3 discards frames because of timeouts.
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.