H3C SOHO IE4300, Command Reference Manual

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Default
The DHCPv6 server does not back up the DHCPv6 bindings.
Views
System view
Predefined user roles
network-admin
Parameters
filename
: Specifies the name of a local backup file. For information about the
filename
argument, see Fundamentals Configuration Guide .
url url : Specifies the URL of a remote backup file. The URL is a case-sensitive string of 1 to 255
characters.
Usage guidelines
The command automatically creates the file if you specify a nonexistent file.
With this command executed, the DHCPv6 server backs up its bindings immediately and runs auto
backup. The server, by default, waits 300 seconds after a binding change to update the backup file.
You can use the
ipv6 dhcp server database update interval
command to change the
waiting time. If no DHCPv6 binding changes, the backup file is not updated.
As a best practice, back up the bindings to a remote file. If you use the local storage medium, the
frequent erasing and writing might damage the medium and then cause the DHCPv6 server to
malfunction.
When the backup file is on a remote device, follow these restrictions and guidelines to specify the
URL:
•
If the file is on an FTP server, enter URL in the format of ftp: //server address:port/file path ,
where the port number is optional.
•
If the file is on a TFTP server, enter URL in the format of tftp: //server address:port/file path ,
where the port number is optional.
•
If the IP address of the server is an IPv6 address, enclose the address in a pair of brackets, for
example,
ftp://[1::1]/database.dhcp .
•
You can also specify the DNS domain name for the server address field, for example,
ftp://company/database.dhcp .
Examples
# Configure the DHCPv6 server to back up its bindings to the file database.dhcp
<Sysname> system-view
[Sysname] ipv6 dhcp server database filename database.dhcp
Related commands
ipv6 dhcp server database update interval
ipv6 dhcp server database update now
ipv6 dhcp server database update stop
ipv6 dhcp server database update interval
Use ipv6 dhcp server database update interval to set the waiting time for the DHCPv6
server to update the backup file after a DHCPv6 binding change.
Use undo ipv6 dhcp server database update interval to restore the default.