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Configuration Guide - Security

S1720, S2700, S5700, and S6720 V200R011C10

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, URPF, keychain, MPAC, separating the management plane from the service plane, security risks, PKI.
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How Can the CPU Be Protected from DHCPv6 Messages?

How Can the CPU Be Protected from DHCPv6 Messages?

Run the display cpu-defend statistics command to check the statistics on CPCAR packets. If a large number of DHCPv6 messages are discarded, check whether IPv6 is required. If IPv6 is not required, configure an attack defense policy to to directly discard DHCPv6 messages.

Run the undo dhcp snooping enable ipv6 command to disable DHCPv6 snooping on the switch in V200R001 and later versions.

Updated: 2019-09-23

Document ID: EDOC1000178177

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