Enterasys SecureStack C2 C2G170-24

Setting Port Link Traps and Link Flap Detection
SecureStack C2 Configuration Guide 7-21
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indi cating
changestotheirlinkstatus(upordown).
Thelinkflapfunctiondetect s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
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
For information about... Refer to page...
show port trap 7-21
set port trap 7-22
show linkflap 7-22
set linkflap globalstate 7-25
set linkflap portstate 7-25
set linkflap interval 7-26
set linkflap action 7-26
clear linkflap action 7-27
set linkflap threshold 7-27
set linkflap downtime 7-28
clear linkflap down 7-28
clear linkflap 7-29
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7‐2.