Cisco Nexus 5000 Series Switch Fabric Manager Software Configuration Guide, NX-OS 4.0 (OL-16598-01, June 2008)

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31-3
Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
Chapter 31 Troubleshooting Your Fabric
Analyzing Switch Device Health
The Cisco Traffic Analyzer for Fibre Channel presents reports with network wide statistics. The
Summary Traffic report shows what percentage of traffic was within different ranges of frames sizes. A
breakdown of the percentage of traffic for each protocol such as SCSI and ELS, is provided. The average
and peak throughput for the SPAN traffic being analyzed are also provided.
Fibre Channel traffic can be analyzed on a per-VSAN basis with the Cisco Traffic Analyzer. The Domain
Traffic Distribution graphs indicate how much traffic (bytes) were transmitted or received by a switch
for a particular VSAN. FC Traffic Matrix graphs show how much traffic is transmitted and received
between Fibre Channel sources and destinations. The total byte and frame counts for each VSAN are
also provided.
Statistics can be analyzed for individual host and storage ports. You can see the percentage of SCSI read
versus write traffic, SCSI versus other traffic, and percentage of transmitted versus received bytes and
frames. The peak and average throughput values are available for data transmitted and received by each
port.
Cisco Protocol Analyzer
The Cisco Protocol Analyzer for Fibre Channel enables you to view Fibre Channel traffic frames in
real-time or from a capture file. Fibre Channel and SCSI decoders enable you to view and analyze traffic
at the frame level. It matches response with request for complete decoding, which greatly simplifies
navigation. Response time between response and status are presented.
The Cisco Protocol Analyzer is VSAN aware, so VSANs can be used as criteria for capture and display
filters. VSAN numbers can also be displayed in a column. Summary statistics are available for protocol
distribution percentages and total bytes or frames transferred between specific Fibre Channel source and
destination pairs. File capture and filtering controls are available. Captured files can be analyzed by
either the Cisco Protocol Analyzer or the Cisco Traffic Analyzer.
Numerous features have been included for ease-of-use. You can find frames that meet particular criteria
and mark them. Entries in the frame (packet) list can be colored to highlight items of interest, and
columns can be added or removed as desired.
The protocol analysis functions are provided by Wireshark open-source software, which was enhanced
by Cisco to decode Fibre Channel and SCSI protocols and support enhanced inter-switch link (ISL)
headers for SPAN. Wireshark is available on the Cisco.com software download center, under the Cisco
Port Analyzer Adapter. Wireshark is also available on the Internet at http://www.wireshark.org.
Wireshark runs under Microsoft Windows, Solaris, and Linux operating systems.
Analyzing Switch Device Health
The Switch Health option lets you determine the status of the components of a specific switch.
To use the Switch Health option in Fabric Manager to determine the status of the components of a
specific switch, perform this task:
Step 1 Choose Tools > Switch Health.
You see the Switch Health Analysis window.
Step 2 Click Start to identify problems currently affecting the selected switch.
You see any problems listed in the switch health analysis window as shown in Figure 31-1.