UMN:CLI
User Manual
V8102
438
Command
Mode
Description
show ipv6 dhcp binding
Enable
Global
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.
Command
Mode
Description
clear ipv6 dhcp binding
Enable
Global
Clears an automatic address binding from the DHCPv6
server database.
9.7.2
DHCPv6 Snooping
For enhanced security, the V8102 provides the DHCP snooping feature. The DHCP
snooping filters untrusted DHCP messages and maintains a DHCP snooping binding ta-
ble. An untrusted message is a message received from outside the network, and an un-
trusted 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 differ-
entiate between untrusted interfaces connected to the end-user and trusted interfaces
connected to the DHCP server or another switch.
9.7.2.1
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 fol-
lowing command
Command
Mode
Description
ipv6 dhcp snooping
Global
Interface
[GE/XE/GP
ON]
Enables the DHCPv6 snooping on the system.
no ipv6 dhcp snooping
Disables the DHCPv6 snooping on the system. (de-
fault)
To enable the DHCPv6 snooping on a VLAN, use the following command
Command
Mode
Description
ipv6 dhcp snooping vlan
VLANS
Global
Enables the DHCPv6 snooping on a specific VLAN.
no ipv6 dhcp snooping vlan
VLANS
Disables the DHCPv6 snooping on a specific VLAN.
You must enable DHCPv6 snooping on the system before enabling DHCPv6 snooping on
!
