Saving Dhcpv6 Snooping Entries - H3C MSR 2600 Configuration Manual

Step
5. Enable support for Option 37.
•
(Optional.) Specify the content
as the remote ID.

Saving DHCPv6 snooping entries

DHCPv6 snooping entries cannot survive a reboot. You can save DHCPv6 snooping entries to a file so
that DHCPv6 snooping can read DHCPv6 snooping entries from this file during a reboot. This allows
security features (such as IP source guard) that use DHCPv6 snooping entries to continue to use these
entries to check the user validity of DHCPv6 clients.
IMPORTANT:
If you disable DHCPv6 snooping with the undo ipv6 dhcp snooping enable command, the device deletes
all DHCPv6 snooping entries, including those stored in the specified database file.
To save DHCPv6 snooping entries:
Step
1. Enter system view.
2. Specify a file to store
DHCPv6 snooping entries.
3. (Optional.) Manually save
DHCPv6 snooping entries
to the database file.
4. (Optional.) Set the amount
of time to wait to update
the database file after
DHCPv6 snooping entry
changes.
Command
ipv6 dhcp snooping option
remote-id enable
ipv6 dhcp snooping option
remote-id [ vlan vlan-id ] string
remote-id
Command
system-view
ipv6 dhcp snooping
binding database
filename filename
ipv6 dhcp snooping
binding database update
now
ipv6 dhcp snooping
binding database update
interval seconds
229
Remarks
By default, Option 37 is not
supported.
By default, the DHCPv6 snooping
device uses its DUID as the content
for Option 37.
Remarks
N/A
By default, no file is specified.
This command enables the device to
immediately save DHCPv6 snooping entries to
the specified database file. If the file does not
exist, the device automatically creates the file.
The device does not update the file for a
specific amount of time after a DHCPv6
snooping entry changes. The default period is
300 seconds. To change the value, use the
ipv6 dhcp snooping binding database update
interval command.
DHCPv6 snooping entries are saved to the
database file each time this command is
executed.
The default setting is 300 seconds.
When a DHCPv6 snooping entry is learned or
removed, the device does not update the
database file until after the specified waiting
period. All changed entries during that period
will be updated.