This object indicates whether the DHCP Snooping feature is
enabled at the device level.
Setting this object to 'false' disables the DHCP Snooping
feature globally thus disabling the feature at each VLAN.
Setting this object to 'true' will start the DHCP Snooping
feature running in the device. Once the DHCP Snooping is
enabled, whether the feature is running at each VLAN is
controlled by the cdsVlanConfigTable.