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Configuration Guide - Security

S7700 and S9700 V200R011C10

This document describes the configurations of Security, including ACL, reflective 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, separating the management plane from the service plane, security risks.
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Why Cannot the Switch Be Pinged Intermittently?

Why Cannot the Switch Be Pinged Intermittently?

Check whether some ICMP packets are discarded by CPCAR.
  • If some ICMP packets are discarded by CPCAR, ping packets cannot be sent to the CPU. Modify the CIR value of ICMP packets.

    Improper CPCAR settings will affect services on your network. If you need to adjust CPCAR settings, you are advised to contact technical support personnel for help.

  • If no ICMP packet is discarded by CPCAR, run the undo icmp rate-limit enable command to disable ICMP rate limit. Then check whether forwarding information, such as the returned route, exist on the switch.
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Updated: 2019-04-01

Document ID: EDOC1000178319

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