Cisco Systems DSC9148D8G48PK9 Displaying Port Tracking Information, Linked port, Tracked port

Chapter 9 Configuring Port Tracking

Displaying Port Tracking Information

Information AboutForceful Shutdown

If a tracked port flaps frequently, then tracking ports using the operational binding feature may cause frequent topology change. In this case, you may choose to keep the port in the down state until you are able to resolve the reason for these frequent flaps. Keeping the flapping port in the down state forces the traffic to flow through the redundant path until the primary tracked port problems are resolved. When the problems are resolved and the tracked port is back up, you can explicitly enable the interface.

Tip If you configure this feature, the linked port continues to remain in the shutdown state even after the tracked port comes back up. You must explicitly remove the forced shut state (by administratively bringing up this interface) of the linked port once the tracked port is up and stable.

Forcefully Shutting Down a Tracked Port

Detailed Steps

To forcefully shut down a tracked port, follow these steps:

	Command	Purpose
Step 1
	switch# config t	Enters configuration mode.
Step 2
	switch(config)# interface fc1/5	Configures the specified interface and enters the
		interface configuration submode. You can now
		configure tracked ports.
Step 3
	switch(config-if)#port-track force-shut	Forcefully shuts down the tracked port.
	switch(config-if)#no port-track force-shut	Removes the port shutdown configuration for the
		tracked port.

Displaying Port Tracking Information

Examples

The show commands display the current port tracking settings for the Cisco MDS switch (see Examples 9-1to 9-4).

Example 9-1 Displays the Linked and Tracked Port Configuration

		switch# show interface
...			<-------------------------------------	Linked port
		fc8/6 is down (All tracked ports down)
		Hardware is Fibre Channel, FCOT is short wave laser
		Port WWN is 21:c6:00:05:30:00:37:1e
		Admin port mode is auto, trunk mode is on
		Port vsan is 1
		Receive data field Size is 2112
		Beacon is turned off
		Port tracked with interface port-channel 1 vsan 2 (trunking) <-----		Tracked port
		Port tracked with interface fcip 5 <	------------------------------------------	Tracked port
		5 minutes input rate 0 bits/sec, 0 bytes/sec, 0 frames/sec
		5 minutes output rate 0 bits/sec, 0 bytes/sec, 0 frames/sec
		Cisco MDS 9000 Family NX-OS Quality of Service Configuration Guide
	9-6			OL-29284-01