Operation Manual – ARPH3C S7500E Series Ethernet Switches Chapter 1 ARP Configuration1-41) A dynamic entry is automatically created and maintained by ARP. It can get aged,be updated by a new ARP packet, or be overwritten by a static ARP entry. Whenthe aging timer expires or the port goes down, the corresponding dynamic ARPentry will be removed.2) A static ARP entry is manually configured and maintained. It cannot get aged or beoverwritten by a dynamic ARP entry. It can be permanent or non-permanent.z A permanent static ARP entry can be directly used to forward packets. Whenconfiguring a permanent static ARP entry, you must configure a VLAN andoutbound port for the entry besides the IP address and MAC address.z A non-permanent static ARP entry cannot be directly used for forwarding data.When configuring a non-permanent static ARP entry, you only need to configurethe IP address and MAC address. When forwarding IP packets, the device sendsan ARP request. If the source IP and MAC addresses in the received ARP replyare the same as the configured IP and MAC addresses, the device adds the portreceiving the ARP reply into the static ARP entry. Now the entry can be used forforwarding IP packets.Note:Usually ARP dynamically implements and automatically seeks mappings from IPaddresses to MAC addresses, without manual intervention.1.2 Configuring ARP1.2.1 Configuring a Static ARP EntryA static ARP entry is effective when the device works normally. However, when a VLANor VLAN interface to which a static ARP entry corresponds is deleted, the entry, ifpermanent, will be deleted, and if non-permanent and resolved, will becomeunresolved.Follow these steps to configure a static ARP entry:To do… Use the command… RemarksEnter system view system-view —Configure a permanentstatic ARP entryarp static ip-addressmac-address vlan-idinterface-typeinterface-numberRequiredNo permanent static ARPentry is configured bydefault.
