Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 577

User Guidelines Reducing the delay allows IPDT to discover devices more quickly. Reducing the delay to too small of a value may cause IPDT to query a device during the quiet period after the host has sent a gratuitous ARP. The ARP probe may confuse the host and require the host interface to be reset. Use of the ip device tracking probe auto-source fallback may help to ameliorate this issue. Some network implementations have had good results with the delay set to around 10 seconds. Command History Command introduced in version 6.6.0 firmware. Example This example globally enables IPDT and sets the transition delay to 10 seconds. console(config)#ip device tracking console(config)#ip device tracking probe delay 10 ip device tracking probe auto-source fallback Use the ip device tracking probe auto-source fallback command to configure the source IP address sent in ARP probes. Use the no form of the command to use the default IP address in ARP probes. Syntax ip device tracking probe auto-source fallback host-ip mask override no ip device tracking probe auto-source fallback • host-ip-An IPv4 host address in dotted quad notation. Only non-masked bits should be set in the IP address (e.g., 0.0.0.1). • mask-An IPv4 mask used for source IP of the IPDT entries in dotted quad notation (e.g., 255.255.0.0). The ARP probe destination IP address is the inverse of the mask AND'd with the host-ip address parameter which is then OR'd with the destination IP address AND'd with the mask. Layer 2 Switching Commands 577