• Too many undersized/giant packets (bad driver)
• Excessive late collisions (cable too long)
• High collision or drop rate (over bandwidth)
• Excessive broadcast packets (broadcast storm)
• Excessive multicast packets (multicast storm)
• Duplex mismatch (duplex mismatch HDx - reconfigure to Full Duplex)
• Duplex mismatch (duplex mismatch FDx - reconfigure port to Auto)
• Rapid detection of link faults and recoveries (link flap)
• Link loss detection (loss of link)
NOTE:
Fault finder is also known as FFI (find-fix-inform).
Fault Finder thresholds
Switches feature automatic fault detection, which helps protect against network loops and defective equipment.
The fault detection sensitivity setting determines the types of alerts reported to the Alert Log based on their level
of severity or sensitivity. The sensitivity levels are:
•
High Sensitivity.
This policy directs the switch to send all alerts to the Alert Log. This setting is most effective on networks that
have none or few problems.
•
Medium Sensitivity.
This policy directs the switch to send alerts related to network problems to the Alert Log.
If you want to be notified of problems which cause a noticeable slowdown on the network, use this setting.
•
Low Sensitivity.
This policy directs the switch to send only the most severe alerts to the Alert Log. This policy
is most effective on a network where there are normally a lot of problems and you want to be informed of only
the most severe ones
•
Disabled.
Disables the Alert Log and transmission of alerts (traps) to the management server (in cases where
a network management tool such as ProCurve Manager is in use). Use this option when you don’t want to use
the Alert Log.
Enabling Fault Finder
Enter this CLI command to enable fault detection:
Syntax:
[no] fault-finder [fault][sensitivity <low|medium|high>][action <warn|warn-and-disable>]
Enables or disables Fault Finder and sets sensitivity.
When the
warn-and-disable
action option is configured, Fault Finder may also shut down a bad port in
addition to sending an alert to the Alert Log.
Default setting:
fault-finder sensitivity medium action warn
[fault]
: Supported values are:
Chapter 6 Port Traffic Controls
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