Configuration procedure
# Enable DHCPv6 snooping globally.
<Switch> system-view [Switch] ipv6 dhcp snooping enable
# Add GigabitEthernet 1/0/1, GigabitEthernet 1/0/2, and GigabitEthernet 1/0/3 to VLAN 2.
[Switch] vlan 2 [Switch-vlan2] port GigabitEthernet 1/0/1 GigabitEthernet 1/0/2 GigabitEthernet 1/0/3
# Enable DHCPv6 snooping for VLAN 2.
[Switch-vlan2] ipv6 dhcp snooping vlan enable [Switch] quit
# Configure GigabitEthernet 1/0/1 as a DHCPv6 snooping trusted port.
[Switch] interface GigabitEthernet 1/0/1 [Switch-GigabitEthernet1/0/1] ipv6 dhcp snooping trust