Troubleshooting

Listed below are some verifications that can be performed while testing the Central Location Services.

Clients not visible on the floor plan

• Ensure that the Clients field is selected.

Navigate to Central Global → Sites → choose the desired site for viewing → click on the displayed view.

• Use the REST API to further verify client information. For more details on REST APIs, refer to the Polling API section.

• Ensure that Access Point is sending RSSI messages to Central. Use the command show running-config | include rssi.

  AP-3-Loc# show running-config | include rssi
  report-rssi-to-central unassociated-and-associated-clients
  

• Ensure that the message length exceeds a couple of hundred bytes; otherwise, the IAP is transmitting RSSI for its BSSIDs. Use the command show log ap-debug | include rssi.

  AP-3-Loc# show log ap-debug | include rssi
  Nov 6 15:23:11 awc[6232]: [cloud] wsc: insert queue a message to
  websocket server, topic iap.rssi, msg_len=10714.
  
  Nov 6 15:24:10 awc[6232]: [cloud] wsc: receive a post request from
  application, topic rssi, data len 13123, ce_ctx , len 0.
  
  Nov 6 15:24:10 awc[6232]: [cloud] wsc: insert queue a message to
  websocket server, topic iap.rssi, msg_len=13136.
  
  Nov 6 15:25:10 awc[6232]: [cloud] wsc: receive a post request from
  application, topic rssi, data len 10629, ce_ctx , len 0.
  
  Nov 6 15:25:10 awc[6232]: [cloud] wsc: insert queue a message to
  websocket server, topic iap.rssi,
  

• Make sure that the AP has subscribed to RSSI reporting with Central. Use the command show ap debug msg-subscription.

  AP-3-Loc# show ap debug msg-subscription
  Subscription modules List
  -------------------------
  message type Central ALE
  ------------ ------- ---
  state FALSE FALSE
  stat FALSE FALSE
  rssi TRUE FALSE
  clarity TRUE FALSE
  apprf TRUE FALSE
  trap FALSE FALSE
  speedtest FALSE FALSE
  telemetry TRUE FALSE
  

Clients placed on top of APs

When this scenario is encountered there is a high likelihood that only one or two APs are present on the floor. This is expected behavior for this situation and the recommendation is to consider optimizing AP placement. A minimum of three APs is required for trilateration to work effectively. For more details on the AP placement, refer to the Network Design section.