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

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Nexus 5000 Series Switch Fabric Manager Software Configuration Guide
OL-16598-01
Chapter 31 Troubleshooting Your Fabric
Configuring a Fabric Analyzer
If a VSAN is not specified when you change the policies, the changed value is applied to all VSANs in
the switch.
Step 2 Expand Switches, expand FC Services, and choose Timers & Policies in the Physical Attributes tree.
You see timeouts for only switches in the selected VSAN shown in the Information pane.
Step 3 Click Change Timeouts to configure the time-out values.
You see the Change Timeouts dialog as shown in Figure 31-13.
Figure 31-13 Change Timeouts per VSAN in Fabric Manager
Step 4 Change the timeout values shown in Figure 31-13.
Step 5 Indicate values for R_A_TOV (Resource Allocation Timeout Value), D_S_TOV (Distributed Services
Timeout Value), and E_D_TOV (Error Detect Timeout Value).
Step 6 Click Apply.
Step 7 Click Close to close the dialog box.
Configuring a Fabric Analyzer
Fibre Channel protocol analyzers capture, decode, and analyze frames and ordered sets on a link.
Existing Fibre Channel analyzers can capture traffic at wire rate speed. They are expensive and support
limited frame decoding. Also, existing analyzers disrupt the traffic on the link while snooping traffic.
With the Cisco Fabric Analyzer, you can capture Fibre Channel control traffic from a switch and decode
it without having to disrupt any connectivity, and without having to be local to the point of analysis.
The Cisco Fibre Channel protocol analyzer is based on two popular public-domain software
applications:
• libpcap—See http://www.tcpdump.org.
• Wireshark—See http://www.wireshark.com.
Note The Cisco Fabric Analyzer is useful in capturing and decoding control traffic, not data traffic. It is
suitable for control path captures, and is not intended for high-speed data path captures.