Overview 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 to 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 the destination MAC addresses of packets. When this happens, broadcast storms may occur on the network and forwarding performance of the device will deteriorate.
Traffic suppression and storm control can control these packets and prevent broadcast storms.