Setting Port Link Traps And Link Flap Detection; Purpose; Commands; Show Port Trap - Enterasys D-Series Cli Reference Manual

Setting Port Link Traps and Link Flap Detection

Purpose

To disable or re‐enable link traps, display link trap status, and to configure the link flapping
detection function. By default, all ports are enabled to send SNMP trap messages indicating
changes to 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

For information about...

show port trap

set port trap
show linkflap
set linkflap globalstate
set linkflap portstate
set linkflap interval
set linkflap action
clear linkflap action
set linkflap threshold
set linkflap downtime
clear linkflap down
clear linkflap
show port trap
Use this command to display whether the port is enabled for generating an SNMP trap message if
its link state changes.
Syntax
show port trap [port-string]
Parameters
port‐string (Optional) Displays link trap status for specific port(s). For a detailed
description of possible port‐string values, refer to "Port String Syntax Used
in the CLI" on page 6‐1.
Setting Port Link Traps and Link Flap Detection
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