Port Configuration Command Set
Configuring Link Traps and Link Flap Detection
Matrix DFE-Platinum and Diamond Series Configuration Guide 4-67
4.3.8 Configuring Link Traps and Link Flap Detection
Purpose
To disable or re-enable link traps and to configure the link flapping detection function. By default,
all ports are enabled to send SNMP trap messages indicating changes in their link status (up or
down). The link flap function detects when a link is going up and down rapidly (also called “link
flapping”) on a physical port, and takes the required actions (disable port, and eventually send
notification trap) to stop such a condition. If left unresolved, the “link flapping” condition can be
detrimental to network stability because it can trigger Spanning Tree and routing table recalculation.
Commands
The commands used to configure link flap detection are listed below and described in the associated
section as shown.
• show port trap (Section 4.3.8.1)
• set port trap (Section 4.3.8.2)
• show linkflap (Section 4.3.8.3)
• set linkflap globalstate (Section 4.3.8.4)
• set linkflap (Section 4.3.8.5)
• set linkflap interval (Section 4.3.8.6)
• set linkflap action (Section 4.3.8.7)
• clear linkflap action (Section 4.3.8.8)
• set linkflap threshold (Section 4.3.8.9)
• set linkflap downtime (Section 4.3.8.10)
• clear linkflap down (Section 4.3.8.11)
• clear linkflap (Section 4.3.8.12)
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