3Com Switch 8800 Configuration Guide Chapter 12 ARP Configuration12-312.2.2 Configuring the Dynamic ARP Aging TimerFor purpose of flexible configuration, the system provides the following commands toassign dynamic ARP aging period. When the system learns a dynamic ARP entry, itsaging period is based on the current value configured.Perform the following configuration in system view.Table 12-2 Configure the dynamic ARP aging timerOperation CommandConfigure the dynamic ARP aging timer arp timer aging aging-timeRestore the default dynamic ARP agingtime undo arp timer agingBy default, the aging time of dynamic ARP aging timer is 20 minutes.12.2.3 Enabling/Disabling the Checking Function of ARP EntryYou can use the following command to control the device whether to learn the ARPentry where the MAC address is a multicast MAC address.Perform the following configuration in system view.Table 12-3 Enable/Disable the checking function of ARP entryOperation CommandEnable the checking of ARP entry, that is, thedevice does not learn the ARP entry where theMAC address is a multicast MAC addressarp check enableDisable the checking of ARP entry, that is, thedevice learns the ARP entry where the MACaddress is a multicast MAC addressundo arp check enableBy default, the checking of ARP entry is enabled, that is, the device does not learn theARP entry where the MAC address is a multicast MAC address.
