Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 573

• The state of associated interface changes from forwarding to nonforwarding. • If DHCP snooping is disabled, entries added via DHCP snooping are marked INACTIVE. • The DHCP lease associated with the table entry is terminated or deleted. Only ARP packets that are validated by Dynamic ARP Inspection (if enabled) are processed by IPDT. The Authentication Manager utilizes the IP/MAC device entries in the IPDT table to populate the source IP address in Dynamic Access Control Lists while authenticating clients. In this case, DHCP snooping must be enabled and properly configured by the administrator. DHCP snooping is able to snoop DHCP packets on 802.1X unauthenticated ports configured in 802.1X auto mode. The administrator can configure the maximum number of host entries that can be added to the tracking table per interface. When adding a new entry, if the number of entries on an interface exceeds the configured limit, all entries associated with the interface are deleted from the table. Command History Command introduced in version 6.6.0 firmware. Example This example globally enables IP Device Tracking and DHCP snooping on VLAN1. IPDT relies on DHCP snooping and ARP probes to populate its bindings table. The DHCP server is reachable from interface Te1/0/1. console(config)#ip device tracking console(config)#ip dhcp snooping console(config)#ip dhcp snooping vlan 1 console(config)#interface te1/0/1 console(config-if-Te1/0/1)#ip dhcp snooping trust console(config-if-Te1/0/1)#exit ip device tracking probe Use the ip device tracking probe command to enable sending of ARP probes for IP device tracking. Layer 2 Switching Commands 573