ipMapForwardingTask very high CPU

Hello all,

We have a stack of 7 units of Dell PowerConnect 6224 with 2.2.0.3 in firmware version.

For couple of day, we have very high CPU on our switch :

Task                    Utilization
----------------------- -----------
osapiTimer                    1.20%
bcmL2X.0                      0.65%
bcmCNTR.0                     0.15%
bcmTX                         0.05%
bcmLINK.0                     0.35%
bcmRX                         2.10%
bcmATP-TX                     0.65%
bcmATP-RX                     0.20%
MAC Send Task                 0.15%
MAC Age Task                  0.70%
dtlTask                       0.15%
hapiRxTask                    0.15%
SNMPTask                     35.85%
radius_timer_task             0.05%
unitMgrTask                   1.05%
dot3ad_timer_task             0.20%
dot3ad_lac_task               0.05%
spmTask                       0.15%
ipMapForwardingTask          55.05%
OSPF Protocol                 0.10%
BXS Req                       0.05%
OSPF Receive                  0.15%
Kernel/Interrupt/Idle         0.80%

Total                        100.00%

The process ipMapForwardingTask use the CPU and we don't understand why.

This platform is in production for several years without any issue

Do you know if the are any tools to find the packets who use this process.

Please reply, If you have any idea about our issue

Thank you very much

Regards,

T