H3C MSR 2600 Series, Руководство по настройке

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Step Command Remarks
5. Enable support for Option 37. ipv6 dhcp snooping option
remote-id enable
By default, Option 37 is not
supported.
•
(Optional.) Specify the content
as the remote ID.
ipv6 dhcp snooping option
remote-id
[ vlan vlan-id ] string
remote-id
By default, the DHCPv6 snooping
device uses its DUID as the content
for Option 37.
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 Command Remarks
1. Enter system view.
system-view N/A
2. Specify a file to store
DHCPv6 snooping entries.
ipv6 dhcp snooping
binding database
filename filename
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.
3. (Optional.) Manually save
DHCPv6 snooping entries
to the database file.
ipv6 dhcp snooping
binding database update
now
DHCPv6 snooping entries are saved to the
database file each time this command is
executed.
4. (Optional.) Set the amount
of time to wait to update
the database file after
DHCPv6 snooping entry
changes.
ipv6 dhcp snooping
binding database update
interval seconds
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.