linkUp NOTIFICATION-TYPE
OBJECTS { ifIndex }
STATUS current
DESCRIPTION
"A linkUp trap signifies that the SNMPv2 entity, acting in
an agent role, recognizes that one of the communication
links represented in its configuration has come up."
::= { snmpTraps 4 }
According to this invocation, the trap authoritatively identified as
{ snmpTraps 4 }
is used to report a link coming up.