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65-2
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 65 Configuring Port Tracking
Port Tracking
The port tracking feature monitors and detects failures that cause topology changes and brings down the
links connecting the attached devices. When you enable this feature and explicitly configure the linked
and tracked ports, the Cisco NX-OS software monitors the tracked ports and alters the operational state
of the linked ports on detecting a link state change.
The following terms are used in this chapter:
• Tracked ports—A port whose operational state is continuously monitored. The operational state of
the tracked port is used to alter the operational state of one or more ports. Fibre Channel, VSAN,
PortChannel, FCIP, or a Gigabit Ethernet port can be tracked. Generally, ports in E and TE port
modes can also be Fx ports.
• Linked ports—A port whose operational state is altered based on the operational state of the tracked
ports. Only a Fibre Channel port can be linked.
Port Tracking
Before configuring port tracking, consider the following guidelines:
• Verify that the tracked ports and the linked ports are on the same Cisco MDS switch.
• Be aware that the linked port is automatically brought down when the tracked port goes down.
• Do not track a linked port back to itself (for example, Port fc1/2 to Port fc2/5 and back to Port fc1/2)
to avoid recursive dependency.
This section includes the following topics:
• About Port Tracking, page 65-2
• Enabling Port Tracking, page 65-3
• About Configuring Linked Ports, page 65-3
• Operationally Binding a Tracked Port, page 65-3
• About Tracking Multiple Ports, page 65-5
• Tracking Multiple Ports, page 65-5
• About Monitoring Ports in a VSAN, page 65-6
• Monitoring Ports in a VSAN, page 65-6
• About Forceful Shutdown, page 65-6
• Forcefully Shutting Down a Tracked Port, page 65-6
About Port Tracking
Port tracking has the following features:
• The application brings the linked port down when the tracked port goes down. When the tracked port
recovers from the failure and comes back up again, the tracked port is also brought up automatically
(unless otherwise configured).
• You can forcefully continue to keep the linked port down, even though the tracked port comes back
up. In this case, you must explicitly bring the port up when required.
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