Users Guide

Layer 2 Switching Commands 364
Default Configuration
This command has no default configuration.
Command Modes
User Exec, Privileged Exec
User Guidelines
The IPv6 snooping statistics are also cleared by the clear counters command.
Example
(console)#clear ipv6 dhcp snooping statistics
ipv6 dhcp snooping
Use the ipv6 dhcp snooping command to globally enable IPv6 DHCP
snooping. Use the no form of the command to globally disable IPv6 DHCP
snooping.
Syntax
ipv6 dhcp snooping
no ipv6 dhcp snooping
Default Configuration
By default, DHCP snooping is not enabled.
Command Modes
Global Configuration mode
User Guidelines
The DHCP snooping application processes incoming DHCP messages. For
RELEASE and DECLINE messages from a DHCPv6 client and
RECONFIGURE messages from a DHCPv6 server received on an untrusted
interface, the application compares the receive interface and VLAN with the
client’s interface and VLAN in the bindings database. If the interfaces do not
match, the application logs the event and drops the packet. If configured, for
valid client messages, DHCP snooping additionally compares the source