Capwap high bandwidth utilization

Question

Hello,
I would like to know if this traffic is correct... (wan link - remote APs)
minute:
15 minutes:
I think that something is wrong... there is a high bandwidth utilization.
All APs are configured with h-reap and local switching.
All traffic wan link - 15 minutes:
thanks.

Answer 1

Maybe this answer my question?
Ongoing Exchanges
Heartbeat
  The LWAPP architecture provides for a heartbeat timer that is
      accomplished by a series of Echo Requests and Echo
      Responses. An AP periodically sends Echo Requests in order to
      determine the state of the connection between the AP and the WLC. In response,
      the WLC sends the Echo Response in order to acknowledge the receipt of the Echo
      Request. The AP, then, resets the heartbeat timer to the
      EchoInterval. The LWAPP protocol specification draft contains
      a detailed description of these timers. The system heartbeat, coupled with
      fallback mechanism, is 4 packets every 30 seconds and is comprised of these
      packets:
LWAPP ECHO_REQUEST from AP (78 bytes)
LWAPP Echo-Response to AP (64 bytes)
LWAPP PRIMARY_DISCOVERY_REQ from AP (93 bytes)
LWAPP Primary Discovery-Response to AP (97 bytes)
This exchange generates 33 bytes of traffic every 30 seconds.
RRM Measurements
There are two ongoing RRM exchanges. The first one, at every 60-second       interval, is the load and signal measurement and consists of 4 packets. This       exchange always adds up to 396 bytes:
LWAPP RRM_DATA_REQ from AP (107 bytes)
LWAPP Airewave-Director-Data Response to AP (64 bytes)
LWAPP RRM_DATA_REQ from AP (161 bytes)
LWAPP Airewave-Director-Data Response to AP (64 bytes)
The second sequence of packets is the noise measurement that includes a       statistics information request and response sequence. It is done every 180       seconds. This short exchange of packets averages approximately 2,660 bytes and       typically lasts 0.01 seconds. It consists of these packets:
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP STATISTICS_INFO from AP
LWAPP Statistics-Info Response to AP
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP RRM_DATA_REQ from AP 00:14:1b:59:41:80
LWAPP Airewave-Director-Data Response to AP
LWAPP RRM_DATA_REQ from AP
LWAPP Airewave-Director-Data Response to AP
LWAPP STATISTICS_INFO from AP
LWAPP Statistics-Info Response to AP