Enterasys SecureStack A2 A2H124-48P Instalační příručka stáhnout pdf (Strana 37)

Connecting Stacking Cables

SecureStack A2 PoE Installation Guide 3-7

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

membersofthe19‐inchrackasshowninFigure 3‐4.Thenfastentheswitch securely

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

Figure 3-4 Fastening the Switch to the Rack

3. Ifyouareinstallingthisswitchinast ackedconfiguration,repeatthisprocedure

for

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

“ConnectingStackingCables”onpage 3‐7.Otherwise,proceedto“ConnectingAC

andPoEPower”onpage 3‐12.

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the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.Youcanaddswitches

andreachuptoamaximumof384fixedfrontpanel

portsand16SFPportsforatotalof400Ethernetportsperstack.Thestackingcablesallow

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

Figure 3‐5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topology,onecable

connectionisnotmade.

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

Console

25/Up 26/Down

Stack

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CPU

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MGR

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