Enterasys SecureStack A2 A2H124-24P

Connecting Stacking Cables
SecureStack A2 PoE Installation Guide 3-7
2. Withthemountingbracketsat tached,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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 3‐7.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)
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