How often are MAC addresses learnt by NetWatch?
• by periodic polling of the switches via SNMP For Cisco Catalyst switches this is done by the catwatch utility. • the switches should be configured to send the new MAC address to NetWatch (as an SNMP trap) whenever the MAC is learnt. These traps are received by mactrapper. The “watch” and “trapper” utilities maintain relational database tables that you can query using NetWatch. So, when you plug a machine onto a port, and that machine then generates an ethernet frame, NetWatch (and EdgeConf forms which display it) should show that new value immediately.
