snoopTask process in Dell N2000

Hello,

Recently our customer has experienced some delay when managing a Dell N2000 stack (3 sw). The only process we found increasing is:

1297       snoopTask            10.24%    9.52%    8.47% 

what is this process doing?

Seems that only management traffic is affected, other switched traffic (users) apparently is fine.

Firmware is 6.2.6.6 and we are not using DHCP snooping.

Thanks