9-18 Netopia ISDN Router Reference Guiden A cold start trap is generated after the router is reset.n An interface down trap (known as ifDown in SNMP jargon) isgenerated when one of the router’s interfaces, such as a port,stops functioning or is disabled.n An interface up trap (known as ifUp in SNMP jargon) isgenerated when one of the router’s interfaces, such as a port,begins functioning.The Netopia ISDN Router sends traps using UDP (for IP networks).Setting the IP trap receiversYou can specify which SNMP managers are sent the IP trapsgenerated by the Netopia ISDN Router. Up to eight receivers can beset.To go to the IP Trap Receivers screen, select IP Trap Receivers inthe SNMP Setup screen.IP Trap ReceiversShow IP Trap Receivers...Add IP Trap Receiver...Change IP Trap Receiver...Delete IP Trap Receiver...Viewing IP trap receiversTo display a view-only table of IP trap receivers, select Show IP TrapReceivers in the IP Trap Receivers screen.