3Com 3C15500 - Network Director User Manual page 309

Configuration 305
register to receive SNMP traps from supported devices option from the
Monitoring tab of the Tools > Options dialog box:
Figure 143 Monitoring Tab of Tools > Options Dialog Box
:
Unchecking this option will prevent 3Com Network Director from
registering with devices from this point on. Devices already registered will
remain registered until 3Com Network Director deregisters itself in the
normal course of operations. If you wish to immediately de-register
against all devices on your network, uncheck this option, save your map,
and re-open it again.
Even if this option is unchecked, 3Com Network Director will still
generate events for traps that it receives from any devices that are still
configured with 3Com Network Director as an SNMP trap destination.See
"SNMP Trap-Based Events" on page 321 for more information.