Enterasys Matrix DFE-Gold Series

show port trap Configuring Link Traps and Link Flap Detection
Enterasys Matrix DFE-Gold Series Configuration Guide 4-39
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
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
Defaults
Ifport‐stringisnotspecified,thetrapstatusforallportswillbedisplayed.
For information about... Refer to page...
show port trap 4-39
set port trap 4-40
show linkflap 4-40
set linkflap globalstate 4-43
set linkflap 4-43
set linkflap interval 4-44
set linkflap action 4-44
clear linkflap action 4-45
set linkflap threshold 4-45
set linkflap downtime 4-46
clear linkflap down 4-47
clear linkflap 4-47
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 4 ‐2.