Netgear XCM8806 Chassis Hardware Installation Guide - Page 626

NETGEAR 8800 Chassis Switch CLI Manual • enable ip-security dhcp-snooping {vlan} ports [all | ] violation-action [drop-packet {[block-mac | block-port] [duration | permanently] | none]}] {snmp-trap} • enable ip-security arp learning learn-from-dhcp {vlan} ports [all | ] • enable ip-security arp gratuitous-protection {vlan} [all | ] Displaying Gratuitous ARP Information To display information about gratuitous ARP, use the following command: show ip-security arp gratuitous-protection Example The following command enables gratuitous ARP protection for VLAN corp: enable ip-security arp gratuitous-protectection vlan corp enable ip-security arp learning learn-from-arp enable ip-security arp learning learn-from-arp {vlan} ports [all | ] Description Enables ARP learning for the specified VLAN and member ports. Syntax Description vlan_name all ports Specifies the name of the VLAN to which this rule applies. Specifies all ingress ports. Specifies one or more ingress ports. Default By default, ARP learning is enabled. Usage Guidelines ARP is part of the TCP/IP suite used to associate a device's physical address (MAC address) with its logical address (IP address). The switch broadcasts an ARP request that contains the IP address, and the device with that IP address sends back its MAC address so that traffic can be transmitted across the network. The switch maintains an ARP table (also known as an ARP cache) that displays each MAC address and its corresponding IP address. By default, the switch builds its ARP table by tracking ARP requests and replies, which is known as ARP learning. 626 | Chapter 15. Security Commands