1-5z If they are not consistent, the ARP packet is considered invalid and the corresponding ARP entry isnot learned.Configuring ARPFollow these steps to configure ARP basic functions:To do… Use the command… RemarksEnter system view system-view —Add a static ARP entryarp static ip-addressmac-address [ vlan-idinterface-typeinterface-number ]OptionalBy default, the ARP mappingtable is empty, and entries arecreated dynamically by ARP.Configure the ARP aging timer arp timer aging aging-time Optional20 minutes by default.Enable the ARP entry checkingfunction (that is, disable theswitch from learning ARPentries with multicast MACaddresses)arp check enable OptionalEnabled by default.z Static ARP entries are valid as long as the Ethernet switch operates normally. But some operations,such as removing a VLAN, or removing a port from a VLAN, will make the corresponding ARPentries invalid and therefore removed automatically.z As for the arp static command, the value of the vlan-id argument must be the ID of an existingVLAN, and the port identified by the interface-type and interface-number arguments must belong tothe VLAN.z Currently, static ARP entries cannot be configured on the ports of an aggregation group.Configuring Gratuitous ARPFollow these steps to configure gratuitous ARP:To do… Use the command… RemarksEnter system view system-view —Enable the gratuitous ARPpacket learning functiongratuitous-arp-learningenableOptionalDisabled by default.Enter VLAN interface view interface Vlan-interfacevlan-id —Enable the VLAN interface tosend gratuitous ARP packetsperiodicallygratuitous-arpperiod-sending enableOptionalEnabled by default.
