Cisco Systems OL-17037-01 manual Using the CLI to Configure Link Latency, 7-69

Chapter 7 Controlling Lightweight Access Points

Configuring Link Latency

Step 8 When the All APs > Details for page reappears, click the Advanced tab again. The link latency results appear below the Enable Link Latency check box:

•Current—The current round-trip time (in milliseconds) of CAPWAP heartbeat packets from the access point to the controller and back.

•Minimum—Since link latency has been enabled or reset, the minimum round-trip time (in milliseconds) of CAPWAP heartbeat packets from the access point to the controller and back.

•Maximum—Since link latency has been enabled or reset, the maximum round-trip time (in milliseconds) of CAPWAP heartbeat packets from the access point to the controller and back.

Step 9 To clear the current, minimum, and maximum link latency statistics on the controller for this access point, click Reset Link Latency.

Step 10 After the page refreshes and the All APs > Details for page reappears, click the Advanced tab. The updated statistics appear in the Minimum and Maximum fields.

Using the CLI to Configure Link Latency

Using the controller CLI, follow these steps to configure link latency.

Step 1 To enable or disable link latency for a specific access point or for all access points currently associated to the controller, enter this command:

config ap link-latency {enable disable} {Cisco_AP all}

The default value is disabled.

Note The config ap link-latency{enable disable} all command enables or disables link latency only for access points that are currently joined to the controller. It does not apply to access points that join in the future.

Step 2 To view the link latency results for a specific access point, enter this command:

show ap config general Cisco_AP Information similar to the following appears:

Cisco	AP	Identifier	1
Cisco	AP Name		AP1
...
AP Link Latency			Enabled
Current Delay			1	ms
Maximum Delay			1	ms
Minimum Delay			1	ms
Last	updated (based on AP Up Time)		0 days, 05 h 03 m 25 s

The output of this command contains the following link latency results:

•Current Delay—The current round-trip time (in milliseconds) of CAPWAP heartbeat packets from the access point to the controller and back.

•Maximum Delay—Since link latency has been enabled or reset, the maximum round-trip time (in milliseconds) of CAPWAP heartbeat packets from the access point to the controller and back.

•Minimum Delay—Since link latency has been enabled or reset, the minimum round-trip time (in milliseconds) of CAPWAP heartbeat packets from the access point to the controller and back.

	Cisco Wireless LAN Controller Configuration Guide
OL-17037-01		7-69