2-216Cisco Catalyst Blade Switch 3130 and 3032 for Dell Command ReferenceOL-13271-03Chapter 2 Cisco Catalyst Blade Switch 3130 and 3032 for Dell Cisco IOS Commandsip dhcp snooping verifyip dhcp snooping verifyUse the ip dhcp snooping verify global configuration command on the switch stack or on a standaloneswitch to configure the switch to verify on an untrusted port that the source MAC address in a DHCPpacket matches the client hardware address. Use the no form of this command to configure the switchto not verify the MAC addresses.ip dhcp snooping verify mac-addressno ip dhcp snooping verify mac-addressSyntax Description This command has no arguments or keywords.Defaults The switch verifies the source MAC address in a DHCP packet that is received on untrusted portsmatches the client hardware address in the packet.Command Modes Global configurationCommand HistoryUsage Guidelines In a service-provider network, when a switch receives a packet from a DHCP client on an untrusted port,it automatically verifies that the source MAC address and the DHCP client hardware address match. Ifthe addresses match, the switch forwards the packet. If the addresses do not match, the switch drops thepacket.Examples This example shows how to disable the MAC address verification:Switch(config)# no ip dhcp snooping verify mac-addressYou can verify your settings by entering the show ip dhcp snooping user EXEC command.Related CommandsRelease Modification12.2(40)EX1 This command was introduced.Command Descriptionshow ip dhcp snooping Displays the DHCP snooping configuration.
