Enterasys SecureStack C2

Setting Port Link Traps and Link Flap Detection
SecureStack C2 Configuration Guide 5-19
Example
Thisexampleshowshowtoenableflowcontrol:
C2(su)->set flowcontrol enable
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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]
For information about... Refer to page...
show port trap 5-19
set port trap 5-20
show linkflap 5-21
set linkflap globalstate 5-23
set linkflap portstate 5-24
set linkflap interval 5-24
set linkflap action 5-25
clear linkflap action 5-25
set linkflap threshold 5-26
set linkflap downtime 5-26
clear linkflap down 5-27
clear linkflap 5-27