H3C SOHO IE4300, Справочник по командам

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ipv6 dhcp guard apply policy
preference
Use preference to specify an allowed DHCPv6 server preference range.
Use undo preference to restore the maximum or minimum preference to the default value.
Syntax
preference { max max-value | min min-value } *
undo preference [ max | min ]
Default
No DHCPv6 server preference range is configured, and DHCPv6 servers with preferences 1 to 255
can pass the preference check.
Views
DHCPv6 guard policy view
Predefined user roles
network-admin
Parameters
max max-value
: Specifies the maximum value of the DHCPv6 server preference, in the range of 1
to 255. The default is 255.
min min-value
: : Specifies the minimum value of the DHCPv6 server preference, in the range of 1
to 255. The default is 1. The minimum value cannot be higher than the maximum value.
Usage guidelines
The device uses the specified range to match the DHCPv6 server preference in the received
DHCPv6 Advertise message.
•
If the DHCPv6 server preference is in the allowed range, the device continues to use other
criterion to further match the message.
•
If the DHCPv6 server preference in the Advertise message is beyond the allowed range or the
message does not carry the preference, the device drops the message.
When an H3C device acts as a DHCPv6 server, use the ipv6 dhcp server preference
command to set the preference of the DHCPv6 server.
If you execute this command multiple times for a DHCPv6 guard policy, the most recent configuration
takes effect.
Examples
# Set the allowed range to 1 to 100 for the DHCPv6 server preference.
<Sysname> system-view
[
Sysname
]
ipv6 dhcp guard policy p1
[
Sysname-dhcp6-guard-policy-p1
]
preference max 100 min 1
Related commands
ipv6 dhcp server
trust port
Use
trust port
to configure the port to which the DHCPv6 guard policy applies as a trusted port
for the policy.