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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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Clearing the ND Snooping Dynamic Binding Table

Clearing the ND Snooping Dynamic Binding Table


You need to manually delete ND snooping dynamic binding entries if the following requirements are met:

  • The ND snooping dynamic binding entry does not reach the aging time, so the entry cannot age automatically.
  • The user is no longer connected to the network.
  • The user VLAN or interface information changes.

The networking environment change may lead to the change in the VLAN or interface information, while the ND snooping dynamic binding entry mapping a user does not age out and cannot update in real time. As a result, the device discards valid ND packets that do not match the old ND snooping dynamic binding entries. Before changing the networking environment, clear all ND snooping dynamic binding entries manually so that a device generates a new ND snooping dynamic binding table based on the new networking environment.

To manually delete ND snooping dynamic binding entries, run the following command in the user view.


  • Run the reset nd snooping user-bind [ interface interface-type interface-number | ipv6-address ipv6-address | mac-address mac-address | vlan vlan-id ] command to clear ND snooping dynamic binding entries.
Updated: 2019-04-01

Document ID: EDOC1000178319

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