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Configuration Guide - Security

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, separating the management plane from the service plane, security risks.
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Overview of Traffic Suppression and Storm Control

Overview of Traffic Suppression and Storm Control


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.

Unknown unicast packets refer to unicast packets whose destination MAC addresses have not been learned by the device.


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.

Updated: 2019-04-20

Document ID: EDOC1100074765

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