Fortiswitch 6.2 and CPU usage

igmpsnoopingd and iptables according to build in TOP command are using most of CPU.  My fortiswtich 224e-poe has a close to 100% CPU utilization.  What can I do to bring it down?

# get system performance status CPU states: 33% user 66% system 0% nice 1% idle Memory states: 49% used Average network usage: 0 kbps in 1 minute, 0 kbps in 10 minutes, 0 kbps in 30 minutes Uptime: 44 days,  7 hours,  58 minutes