Alcatel-Lucent OmniSwitch 6250, Cli Reference Manual, Page: 1298 / 2018

DHCP Relay Commands
page 32-22 OmniSwitch 6250 CLI Reference Guide November 2009
ip helper dhcp-snooping mac-address verification
Globally enables or disables MAC address verification for incoming DHCP traffic. When this feature is
enabled, the source MAC address is compared to the client hardware MAC address in the DHCP packet. If
these two addresses do not match, the DHCP packet is dropped.
ip helper dhcp-snooping mac-address verification {enable | disable}
Syntax Definitions
enable Enables DHCP MAC address verification for the switch.
disable Disables DHCP MAC address verification for the switch.
Defaults
By default, this feature is disabled.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
•
When DHCP Snooping is enabled at the switch level, MAC address verification and Option-82 data
insertion are enabled by default. In addition, the trust mode for all ports is set to the DHCP client only
mode.
•
Changing the enabled or disabled status for MAC address verification is only allowed when DHCP
Snooping is globally enabled for the switch.
Examples
-> ip helper dhcp-snooping mac-address verification enable
-> ip helper dhcp-snooping mac-address verification disable
Release History
Release 6.6.1; command was introduced.
Related Commands
MIB Objects
iphelperDhcpSnoopingMacAddressVerificationStatus
ip helper dhcp-snooping .Globally enables or disables DHCP Snooping for the switch.
ip helper dhcp-snooping
option-82 data-insertion Globally enables or disables DHCP Option-82 data insertion for DHCP
packets.