I have a stack of 5 ICX 7250 switches running as core routing and switching, which is showing 99% utilization during daytime hours. sh cpu task snapshot shows below. Generally, mcast is ~20 and mcast_fwd ~10-20. This I believe, though not certain, started around the time I deployed an IP surveillance solution, however two other buildings are not showing more than 1% utilization, those IDF are also switching only with OSPF back to the MDF stack. I can't seem to find the commands or methods to track what exactly is causing the mcast and mcast_fwd to be what it is, if it is the problem, or if these numbers and in the normal range.
... Usage average for all tasks in the last 1 second ...
==========================================================
Name %
SigHdlrTsk 0
OsTsk 0
TimerTsk 0
FlashTsk 0
MainTsk 0
MportPollTsk 0
IntrTsk 0
itc 0
syslog 0
syslog_tx 0
stkKeepAlive 0
exUSBHotpluggerTsk 0
keygen 0
bcmDPC 0
bcmINTR 2
socdmadesc.0 0
bcmMEM_SCAN.0 0
bcmIbodSync.0 0
bcmCNTR.0 9
bcmRX 4
bcmL2MOD.0 0
poeFwdfsm 0
scp 0
appl 18
snms 0
rtm 0
rtm6 0
rip 0
bgp 0
bgp_io 0
ospf 0
ospf_r_calc 0
openflow_ofm 0
openflow_opm 0
mcast_fwd 0
mcast 58
msdp 0
ripng 0
ospf6 0
ospf6_rt 0
mcast6 0
ike 0
ipsec 0
dhcp6 0
mcrep 0
snmp 0
rmon 0
web 0
DNA_DDM_MASTER 0
acl 0
spx 0
spxmon 0
spx_ddm 0
flexauth 0
sflow 0
adm_tm 0
TCP_LBD 0
UDP_LBD 0
SOCATM_PARENT 0
TELNET_PARENT 0
SSH_PARENT 0
ntp 0
rconsole 0
ipsec_fpga_cli 0
ikemain 0
pki 0
http_client 0
ssl 0
Keychain 0
common 0
console 0
ospf_msg_task 0
auxTsk 0
bcmLINK.0 1
TELNET_INCSES_1 0
#TheWaterCooler