Slow Performance on Specific AP

Slow Performance on Specific AP

This Blog explains troubleshooting steps to find out cause of slow performance on specific access point.

1. From User’s location information, it is easier to find out WLC details either from Visio or WCS.

2. In WCS, Click Monitor>Controller to get the controller details.

Login to WLC
To find the AP name, Click Monitor>Client>Change Filter> Type User’s machineMac address> Apply

3. Check Load on the AP , As per Cisco recommendation number of clients per AP should not be more than 24. Number of client per AP depends upon the application used by the users.

–> Click Monitor>Clients>Change Filter>Type AP Name. Press Apply. It shows number of clients per AP.

More APs needs to be installed in the same area as per the requirement.Before AP installation site survey has to be done to find the suitable location of the new APs.

4. Check utilization on the AP
Utilization should be low. High utilization can cause performance issues.
ClickMonitor >Access point>a/n or b/g/n> AP to check the current utilization.

5. Check Interference on AP
High Interference peaks on the below graphs suggests that there are other 802.11 devices in the same band that are causing interference on channels used by this system.

Click Monitor >Access point>a/n or b/g/n> AP.

6. Check Switch port to which AP is connected.
Click Monitor > CDP > AP Neighbor > APto find the neighbor details.

Check the input/output etc. errors on switch ports.

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