Specifications

DHCP Snooping Commands
18-4 DHCP Snooping and Dynamic ARP Inspection
Configuration Notes
DHCP Server
•Whentheswitchisoperatinginswitchmode,thentheDHCPserverandDHCPclientsmust
beinthesameVLAN.
•Iftheswitchisinroutingmode(onthoseplatformsthatsupportrouting),thenthe DCHP
servercanberemotely connectedtoaroutinginterface,orrunninglocally.
•IftheDHCP
serverisremotelyconnected,thentheuseofanIPhelperaddressisrequiredand
MACaddressverificationshouldbedisabled(setdhcpsnoopingverifymac‐address
disable).
•TheDHCPservermustuseScopesinordertoprovidethe IPaddressesperVLAN.
•DHCPsnoopingmustbeenabledontheint erfaces
wheretheDHCPclientsareconnected,
andtheinterfacesmustbeuntrustedDHCPsnoopingports.
•TheroutinginterfacethatisconnectedtotheDHCPservermustbeenabledforDHCP
snoopingandmustbeatrustedDHCPsnoopingport.
DHCP Snooping Commands
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set dhcpsnooping 18-5
set dhcpsnooping vlan 18-5
set dhcpsnooping database write-delay 18-6
set dhcpsnooping trust 18-6
set dhcpsnooping binding 18-7
set dhcpsnooping verify 18-8
set dhcpsnooping log-invalid 18-9
set dhcpsnooping limit 18-10
show dhcpsnooping 18-11
show dhcpsnooping database 18-11
show dhcpsnooping port 18-12
show dhcpsnooping binding 18-13
show dhcpsnooping statistics 18-13
clear dhcpsnooping binding 18-14
clear dhcpsnooping statistics 18-15
clear dhcpsnooping database 18-15
clear dhcpsnooping limit 18-16