Users Guide

Discovering Network Devices 937
Configuring IPDT
This example shows how to configure IPDT for operation on the switch.
1 Enable DHCP snooping and IPDT. IPDT relies on DHCP snooping and
ARP probes to populate it's bindings table. The DHCP server is reachable
from interface Te1/0/1.
console#configure
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
console(config)#ip device tracking
2 Optionally configure ARP probes (default enabled)
console(config)#ip device tracking probe
3 Optionally configure the missed probe count to transition an entry to
INACTIVE. Here, 5 consecutive missed probes are required.
console(config)#ip device tracking probe count 5
4 Optionally configure the probe interval. Here, the probe interval is 60
seconds.
console(config)#ip device tracking probe interval
60
5 Optionally configure the ARP source IP address for a host with address
10.5.5.20.
console(config)#ip device tracking probe auto-
source fallback 0.0.0.1 255.255.255.0 override
6 Optionally configure an 11-second delay for sending the first probe after
link up event.
console(config)#ip device tracking probe delay 11
7 Optionally disable IPDT on an interface by setting the maximum host
count to 0.
console(config)#interface te1/0/1
console(config-if-Te1/0/1)#ip device tracking
maximum 0