Trap analysis
A system or network adapter
is considered to be unstable if it fluctuates too often between up
and down states over a short period of time.
The
IP Availability Manager
monitors
a system or network adapter’s state through the SNMP traps it receives
and determines when to generate an unstable notification based on
a combination of fixed values and user-controlled settings. The IP Availability Manager
also
calculates a stable time in which to wait before clearing an Unstable
notification.IP Availability Manager
monitors the following SNMP traps to determine a change
in an object’s state:- coldStart and warmStart traps for a system
- linkUp or linkDown traps for a network adapterIP Availability Managerprimarily uses linkDown traps for the analysis of unstable network adapters. However, for devices that only send linkUp traps,IP Availability Managerdoes use linkUp traps. When a device sends both linkUp and linkDown traps,IP Availability Manageruses linkDown traps for the unstable analysis.