D-Link DXS-3600-EM-8T CLI Guide - Page 49

DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide Default Command Mode Command Default Level Usage Guideline The default timeout value is 20 minutes. Global Configuration Mode. Level: 8 The ARP timeout setting is only applicable to the IP address and the MAC address mapping that are learned dynamically. The shorter the timeout, the truer the mapping table saved in the ARP cache, but the more network bandwidth occupied by the ARP. Hence the advantages and disadvantages should be weighted. Generally it is not necessary to configure the ARP timeout too shorter unless there is a special requirement. Users can verify the settings by entering the show arp timeout command. Example This example shows how to tonfigure the timeout value, for the dynamic ARP mapping record, to 120 minutes. DXS-3600-32S#configure terminal DXS-3600-32S(config)#arp timeout 120 DXS-3600-32S(config)# Example This example shows how to restore the timeout value, for the dynamic ARP mapping record, to 20 minutes. DXS-3600-32S(config)#no arp timeout DXS-3600-32S(config)# 4-3 clear arp cache This command is used to remove one or all dynamic ARP entries from the ARP cache table. clear arp-cache [vrf ] [ip-address] [interface interface-name] Parameters vrf ip-address interface interface-name Specifies the VRF that the IP reside in. If no VRF name is specified, the global instance will be used. (Optional) Enter the IP address of the dynamic ARP entry here. (Optional) Specifies the interface from which the dynamic ARP entry was learned. Default Command Mode Command Default Level Usage Guideline None. Privileged Mode. Level: 8 This command can be used to clear the dynamic ARP entries. Use the show ip arp command to view the current state of the ARP cache table. Example This example shows how to remove all dynamic ARP entries. DXS-3600-32S#clear arp-cache DXS-3600-32S# Example This example shows how to remove a dynamic ARP entry with the IP address 1.1.1.1 DXS-3600-32S#clear arp-cache 1.1.1.1 DXS-3600-32S# 41