3.9.1 DHCPv6 Snooping Configuration

Use this command to enable/disable DHCPv6 snooping mode operation and configure port trust mode.

Command Syntax:

ipv6 dhcp snooping 
ipv6 dhcp snooping nh-unknown { drop | allow }
ipv6 dhcp snooping trust

Table 3-38. Command Description
	Argument	Description
Parameter	`drop`	Drop packets with unknown IPv6 extension headers.
	`allow`	Allow packets with unknown IPv6 extension headers.
Default	N.A
Mode	Global Configuration mode and Port List Configuration mode
Usage	To globally enable DHCPv6 snooping, use `ipv6 dhcp snooping ipv6 dhcp snooping nh-unknown { drop \| allow }` command. To globally disable DHCP snooping, use the ‘no’ form of this command. To configure a port as trusted for DHCPv6 snooping purposes, use `ipv6 dhcp snooping trust`. To configure a port as untrusted, use the ‘no’ form of this command.
Example	Example 1: Enable DHCPv6 snooping and allow packets with unknown IPv6 extension headers. `# configure terminal (config)# ipv6 dhcp snooping (config)# ipv6 dhcp snooping nh-unknown allow` Example 2: Enable DHCPv6 snooping trust on port 1. `# configure terminal (config)# interface GigabitEthernet 1/1 (config-if)# ipv6 dhcp snooping trust`