Hi Aviv,
I believe you should be able to rate limit BUM (broadcast, unknown unicast, multicast) traffic on that VLAN. Are other VLANs also affected?
What is the purpose of port 8116 usage by Checkpoint? I would recommend to use some Policy or ACLs to limit 8116 communication only in a VLAN and at a rate it should be allowed to not interfere with other devices.
Hope that helps,
Tomasz