Overview
This section describes the definition, and functions of traffic suppression and storm control.
Definition
Traffic suppression and storm control are security technologies to control broadcast packets, multicast packets, and unknown unicast packets and prevent broadcast storms caused by these packets.
Traffic suppression limits the traffic by setting a threshold, and storm control blocks the traffic by shutting down an interface.
Purpose
When receiving broadcast packets, multicast packets, and unknown unicast packets, the device forwards the packets to other Layer 2 Ethernet interfaces in the same VLAN if the device cannot determine the outbound interface based on destination MAC addresses of packets. In this case, broadcast storms may occur on the network and forwarding performance of the device deteriorates.
Traffic suppression and storm control can control these packets and prevent broadcast storms.