User Manual UMN:CLI
V5808
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identified in the table.
However, the V5808 may be rebooted with any reason, then DHCP snooping binding
table entries, which are dynamically learned from DHCP packets back and forth the
V5808, would be lost. Thus, ND inspection should be delayed to start during some time
so that DHCP snooping table can build entries. If no time is given, ND inspection sees
empty snooping table and drop every ND packet.
To specify the ND inspection delay time, use the following command.
ipv6 dhcp snooping nd-
inspection start <1-2147483637>
Configures the ND inspection delay time. If reboot, ND
inspection resumes after the time you configure.
1-2147483637: delay time (unit: second, default:1800
seconds)
no ipv6 dhcp snooping nd-
inspection start
Delete the configured ND inspection delay time.
7.16.13.6 Displaying ND Inspection
To display a status of the ND inspection, use the following command.
show ipv6 nd inspection [vlan
VLANS]
Shows a status of the ND inspection.
show ipv6 nd inspection
statistics [vlan VLANS]
Shows collected statistics of the ND inspection.
To clear the collected statistics of the ND inspection, use the following command.
clear ipv6 nd inspection
statistics [vlan VLANS]
Clears collected statistics of the ND inspection.
7.16.14 Gratuitous ND
Gratuitous ND is a broadcast packet like an ND request. It containing IPv6 address and
MAC address of gateway, and the network is accessible even though IPv6 addresses of a
specific host’s gateway are repeatedly assigned to the other.
To configure the interval and transmission count for Gratuitous ND messages, use the
following command. And set the transmission start-delivery time in order to transmit
Gratuitous ND after ND reply. Gratuitous ND is transmitted after some time from
transmitting ND reply.
ipv6 nd patrol TIME COUNT
[TIME]
Configures a gratuitous ND.
TIME: transmit interval
COUNT: the number of attempts to send Gratuitous ND
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