HP Cisco MDS 9120 Cisco MDS 9000 Family CLI Configuration Guide - Release 4.x - Page 1370

Port Tracking Chapter 57 Configuring Port Tracking Send documentation comments to [email protected] Figure 57-1 Traffic Recovery Using Port Tracking ISL2 Direct link 1 WAN or X MAN X FC FC 120490 WAN or MAN 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 57-3 • Enabling Port Tracking, page 57-3 • About Configuring Linked Ports, page 57-3 • Operationally Binding a Tracked Port, page 57-3 • About Tracking Multiple Ports, page 57-4 • Tracking Multiple Ports, page 57-4 • About Monitoring Ports in a VSAN, page 57-5 • Monitoring Ports in a VSAN, page 57-5 • AboutForceful Shutdown, page 57-5 57-2 Cisco MDS 9000 Family CLI Configuration Guide OL-18084-01, Cisco MDS NX-OS Release 4.x