Brocade Fabric Watch Administrator's Guide (53-1000243-01, November 2006)

1-8 Fabric Watch Administrator’s Guide

Publication Number: 53-1000243-01

Fabric Watch Components

Table 1-6 Port Class Areas

Area Indicates

Invalid Cyclic Redundancy

Checks (CRCs)

A frame is invalid and cannot be transmitted. Invalid CRCs can

represent noise on the network. Such frames are recoverable by

retransmission. Invalid CRCs indicate a potential hardware problem.

These errors occur mostly in aging fabrics.

Invalid Transmission Word A word did not transmit successfully. Invalid word messages usually

indicate a hardware problem.

Link Failure Count A link has lost the signal. Both physical and hardware problems can

cause link failures. Link failures frequently occur due to a loss of

synchronization. Check for concurrent loss of synchronization errors

and, if applicable, troubleshoot those errors. Link failures also occur due

to hardware failures.

Loss of Signal Count 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.

Loss of Synchronization

(Sync) Count

Two devices failed to communicate at the same speed. Synchronization

losses are always accompanied by link failure. Loss of synchronization

errors frequently occur due to a faulty SFP or cable.

Primitive Sequence

Protocol Error

A CRC sum disparity. Occasionally, these errors occur due to software

glitches. Persistent errors occur due to hardware problems.

Receive (RX) Performance The percentage of maximum bandwidth consumed in packet receipts.

State Changes 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 testing.

• The port is faulty.

• The port has become an E_Port, EX_Port, VE_Port, or VEX_Port.

• The port has become an F/FL_Port.

• The port has segmented.

• The port has become a trunk port.

Transmit (TX) Performance The percentage of maximum bandwidth consumed in packet

transmissions.

ote

Physical link error counters and statistics (such as link failure count, loss of signal count, and RX and

TX performance percentages) are not applicable to VE_Ports.