Automatic backup of DHCP snooping binding table on S series switch

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For S series switches in V200R003C00 and later versions, you can run the dhcp snooping user-bind autosave file-name [ write-delay delay-time ] command to enable automatic backup of the DHCP snooping binding table and specify the backup interval. By default, local automatic backup of the DHCP snooping binding table is disabled.
By default, S series modular switches and fixed switches back up the DHCP snooping binding table every 1 hour and every 24 hours, respectively.

Other related questions:
How often does the switch automatically back up the DHCP snooping binding table
A chassis switch automatically backs up the DHCP snooping binding table every hour; a box switch automatically backs up the table every 24 hours. From V200R003C00, the interval for automatically backing up the DHCP snooping binding table can be configured.

Generation of dynamic DHCP snooping binding entries on S series switch
Information about generating DHCP snooping binding entries is as follows: - When the dhcp snooping enable command is not run on the user-side interface and the network-side interface is not configured as a trusted interface, users can go online, but no DHCP snooping binding entry is generated. - When the dhcp snooping enable command is not run on the user-side interface and the network-side interface is configured as a trusted interface, users can go online, but no DHCP snooping binding entry is generated. - When the dhcp snooping enable command is run on the user-side interface and the network-side interface is not configured as a trusted interface, users cannot go online, but no DHCP snooping binding entry is generated. - When the dhcp snooping disable command is run on the user-side interface, users can go online, but no DHCP snooping binding entry is generated no matter whether the network-side interface is configured as a trusted interface. - When the dhcp snooping enable command is run on the user-side interface and both user-side and network-side interfaces are configured as trusted interfaces, users can go online, but no DHCP snooping binding entry is generated. - If the DHCP snooping function has been enabled but no DHCP snooping entry is generated, you can check the device configuration in the preceding aspects.

Specifications of IPSG table entries on S series switches
Hi, I cannot answer this question. For details about product specifications, click http://e.huawei.com/en/service-hotline to look up the contact method of your local customer service engineers.

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