Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 465
Enabling Proxy ARP, Clearing ARP Cache, ARP Learning via Gratuitous ARP, Re-enable Proxy ARP.
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Enabling Proxy ARP By default, Proxy ARP is enabled. To disable Proxy ARP, use the no proxy-arp command in the interface mode. To re-enable Proxy ARP, use the following command. • Re-enable Proxy ARP. INTERFACE mode ip proxy-arp To view if Proxy ARP is enabled on the interface, use the show config command in INTERFACE mode. If it is not listed in the show config command output, it is enabled. Only non-default information is displayed in the show config command output. Clearing ARP Cache To clear the ARP cache of dynamically learnt ARP information, use the following command. • Clear the ARP caches for all interfaces or for a specific interface by entering the following information. EXEC privilege clear arp-cache [interface | ip ip-address] [no-refresh] - ip ip-address (OPTIONAL): enter the keyword ip then the IP address of the ARP entry you wish to clear. - no-refresh (OPTIONAL): enter the keywords no-refresh to delete the ARP entry from CAM. Or to specify which dynamic ARP entries you want to delete, use this option with interface or ip ip-address. - For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet then the slot/port information. - For a port channel interface, enter the keywords port-channel then a number. - For a SONET interface, enter the keyword sonet then the slot/port information. - For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port information. - For a VLAN interface, enter the keyword vlan then a number between 1 and 4094. - For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port information. NOTE: Transit traffic may not be forwarded during the period when deleted ARP entries are resolved again and re-installed in CAM. Use this option with extreme caution. ARP Learning via Gratuitous ARP Gratuitous ARP can mean an ARP request or reply. In the context of ARP learning via gratuitous ARP on Dell Networking OS, the gratuitous ARP is a request. A gratuitous ARP request is an ARP request that is not needed according to the ARP specification, but one that hosts may send to: • detect IP address conflicts IPv4 Routing 465
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