msf > use auxiliary/scanner/discovery/arp_sweep
msf auxiliary(arp_sweep) > show options
Module options (auxiliary/scanner/discovery/arp_sweep):
Name Current Setting Required Description
---- --------------- -------- -----------
INTERFACE no The name of the interface
RHOSTS yes The target address range or CIDR identifier
SHOST no Source IP Address
SMAC no Source MAC Address
THREADS 1 yes The number of concurrent threads
TIMEOUT 5 yes The number of seconds to wait for new data
msf auxiliary(arp_sweep) > set RHOSTS 192.168.1.0/24
RHOSTS => 192.168.1.0/24
msf auxiliary(arp_sweep) > set THREADS 10