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Cisco Wireless LAN Controller Configuration Guide
OL-17037-01
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.
