SNMP Reference Guide

690 Traps
Redundancy Unit Traps
Redundancy means that a system chassis has more than one of certain critical
components. Fans and power supplies, for example, are so important for
preventing damage or disruption of a computer system that a chassis may
have "extra" fans or power supplies installed. Redundancy allows a second or
nth fan to keep the chassis components at a safe temperature when the
primary fan has failed. Redundancy is normal when the intended number of
critical components are operating. Redundancy is degraded when a
component fails but others are still operating. Redundancy is lost when the
number of components functioning falls below the redundancy threshold.
The number of devices required for full redundancy is provided as part of the
trap message when applicable for the redundancy unit and the platform. For
more details on redundancy computation, please refer to the respective
platform documentation.
Table 26-8. Redundancy Unit Traps
Trap ID Description Severity Cause
Redundancy Normal
1304 Redundancy regained
Redundancy unit:
<Redundancy location in
chassis>
Chassis location:
<Name of chassis>
Previous redundancy
state was: <State>
Number of devices
required for full
redundancy: <Number>
Information A redundancy sensor in the
specified system detected
that a "lost" redundancy
device has been reconnected
or replaced; full redundancy
is in effect. The redundancy
unit location, chassis
location, and previous
redundancy state are
provided.