Brocade Network Advisor SAN User Manual v12.3.0 - Manual (Page 1390)

1338 Brocade Network Advisor SAN User Manual
53-1003154-01
MAPS monitoring categories
33
TABLE 111 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 frames discarded due 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.
SFP Current The amount of supplied current to the SFP transceiver. Current area events
indicate hardware failures.
SFP Receive power (RXP) The amount of 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 amount of 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 The amount of voltage supplied to the SFP transceiver. If this value exceeds
the threshold, the SFP transceiver is deteriorating.
SFP Temperature (SFP_TEMP) The physical temperature of the SFP transceiver, in degrees Celsius. A high
temperature indicates that the SFP transceiver might be in danger of
damage.
SFP Power on hours (PWR_HRS) The number of hours the 16 Gbps SFP transceiver is powered on.