User Manual UMN:CLI
V5808
369
To display DHCP binding information from the DHCPv6 server binding table, use the
following command.
Shows all automatic client bindings for the specific IP
address from the DHCPv6 server binding table.
To delete/reset the configured bindings of DHCPv6 server, use the following command.
Clears an automatic address binding from the DHCP
server database.
8.6.2 DHCPv6 Snooping
For enhanced security, the V5808 provides the DHCP snooping feature. The DHCP
snooping filters untrusted DHCP messages and maintains a DHCP snooping binding
table. An untrusted message is a message received from outside the network, and an
untrusted interface is an interface configured to receive DHCP messages from outside
the network.
The DHCP snooping basically permits all the trusted messages received from within the
network and filters untrusted messages. In case of untrusted messages, all the binding
entries are recorded in a DHCP snooping binding table. This table contains a hardware
address, IP address, lease time, VLAN ID, interface, etc. It also gives you a way to
differentiate between untrusted interfaces connected to the end-user and trusted
interfaces connected to the DHCP server or another switch.
8.6.2.1 Enabling DHCPv6 Snooping
DHCPv6 snooping should be enabled to allow clients to obtain IPv6 addresses from an
authorized DHCPv6 server. To enable the DHCPv6 snooping on the system, use the
following command
Enables the DHCPv6 snooping on the system.
Disables the DHCPv6 snooping on the system.
(default)
To enable the DHCPv6 snooping on a VLAN, use the following command
ipv6 dhcp snooping vlan VLANS
Enables the DHCPv6 snooping on a specific VLAN.
no ipv6 dhcp snooping vlan
VLANS
Disables the DHCPv6 snooping on a specific VLAN.
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