Chapter5ServiceConguration
Figure5-68ExampleofthePrimaryNodeBlockingtheSecondaryPort(RingStatus:
UP)
Figure5-69ExampleofthePrimaryNodeEnablingtheSecondaryPort(Ringstatus:
DOWN)
Figure5-68showsthateachlinkisoperatingproperly,theringisinidlestatus,andthe
secondaryportoftheprimarynodeisblocked.TrafcpassesthroughswitchesCandD.
Figure5-69showsthatthelinkbetweenswitchesBandCisdisconnected.Thelinkstatus
changestoProtection,andERPSimmediatelyswitchestheRPLportoftheownernode
toforwardingstatus.Aftertheswitching,trafcdoesnotpassthroughswitchesCandD.
AfterthelinkbetweenswitchesCandDisrestored,theRPLportoftheownernodeis
blockedagain,andtheringstatuschangestopendingasshowninFigure5-68.
ConguringERPS
TocongureERPS,performthefollowingsteps.
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