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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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Backing Up DHCP Snooping Binding Entries

Backing Up DHCP Snooping Binding Entries

Context

If binding entries are not backed up, the binding entries will be lost after the device restarts. DHCP users must log in again so that the device can generate DHCP snooping binding entries for DHCP users to communicate. After DHCP snooping binding entries are backed up, DHCP snooping binding entries can be restored after the device restarts.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run the following commands as required.

    • Run dhcp snooping user-bind autosave file-name [ write-delay delay-time ]

      The device is enabled to back up DHCP snooping binding entries locally.

      By default, local automatic backup of the DHCP snooping binding table is disabled.

    • Run dhcp snooping user-bind ftp remotefilename filename host-ip ip-address username username password password [ write-delay delay-time ]

      The device is enabled to automatically back up DHCP snooping binding entries on the remote FTP server.

      By default, the device is not enabled to automatically back up DHCP snooping binding entries on the remote FTP server.

    • Run dhcp snooping user-bind sftp remotefilename filename host-ip ip-address username username password password [ write-delay delay-time ]

      The device is enabled to automatically back up DHCP snooping binding entries on the remote SFTP server.

      By default, the device is not enabled to automatically back up DHCP snooping binding entries on the remote SFTP server.

    • Run dhcp snooping user-bind tftp remotefilename filename host-ip ip-address [ write-delay delay-time ]

      The device is enabled to automatically back up DHCP snooping binding entries on the remote TFTP server.

      By default, the device is not enabled to automatically back up DHCP snooping binding entries on the remote TFTP server.

    NOTE:

    You can only use one of the preceding backup modes on a device.

    FTP and TFTP will bring risk to device security. The SFTP mode is recommended.

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Updated: 2019-04-01

Document ID: EDOC1000178319

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