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Enterasys Networks A2H254-16 Switch User Manual

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Connecting Stacking Cables

SecureStack A2 Installation Guide 3-11

2. Withthemountingbracketsattached,positiontheswitchbetweentheverticalframe

membersofthe19‐inchrackasshowninFigure3‐7.Thenfastentheswi tch securely

totheframeusingfourmountingscrews(usersupplied).

Figure 3-7 Fastening the Switch to the Rack

3. Ifyouareinstallingthisswitchinastackedconfiguration,repeatthisprocedurefor

eachswitchuntilallswitcheshavebeeninstalledinthestack,thenproceedto

“ConnectingStackingCables”onpage3‐11.Otherwise,proceedto“ConnectingAC

andRPS‐SYSPower”onpage3‐15.

Connecting Stacking Cables

Thestackofswitchescanbeconnectedinaclosedloopordaisychained.Inaclosedloop

alltheswitchesareconnectedinsequenceandthelastswitchinthestackisconnected

backtothefirstswitch.Inadaisychainconfigurationthecablethatwouldreturnthe

connection

backtothefirstswitchinaclosedloopisnotinstalled.Theadvantageofthe

closedloopisredundancy,thisconfigurationeliminatesanysinglepointoffailure.Upto

eightswitchescanbestackedtogetherandconnectedbystandardUTPCategory5or

bettercables.Thestackingcablesallow

theentirestacktooperatewithasingleIPaddress.

Figure3‐8showsanexampleofafour‐highstackconnectedinaclosedloop

configuration.AllSTACKDOWNandSTACKUPconnectorsareusedintheinstallation.

ThestackingcableconnectionsarefromtheSTACKDOWNconnectorofone

switchto

theSTACKUPconnectorofthenext

switchupinthestack.Astackingcableconnection

fromtheSTACKDOWNconnectorofthe

switchatthetopofthestacktotheSTACKUP

connectoratthebottomofthestackclosestheloop.Inadaisychainconfiguration,one

cableconnectionisnotmade.

1 Rails of 19-inch rack 2 Mounting screws (supplied by user)

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