Cisco stack wise technology

Cisco StackWise technology provides an innovative new method for collectively utilizing the capabilities of a stack of switches. Individual switches intelligently join to create a single switching unit with a 32-Gbps switching stack interconnect. Configuration and routing information is shared by every switch in the stack, creating a single switching unit. Switches can be added to and deleted from a working stack without affecting performance.

1. CISCO STACKWISETECHNOLOGY
Prepared by: iTawy Team 2015

2. OBJECTIVE
Understanding Switch Stacks
Stack Master
Switch Stack Management Connectivity
Stack Member Numbers / Priority Values
Assigning Stack Member Information
Cisco Catalyst 3750-E Models
Feature
Prepared by: iTawy Team 2015

3. UNDERSTANDING SWITCH STACKS
A SWITCHSTACKISASETOFUPTONINECATALYST3750 SWITCHESCONNECTED THROUGH
THEIRSTACKWISEPORTS. ONEOFTHESWITCHESCONTROLSTHEOPERATIONOFTHESTACK
ANDISCALLEDTHESTACKMASTER. THESTACKMASTERANDTHEOTHERSWITCHESINTHE
STACKARESTACKMEMBERS. THESTACKMEMBERSUSETHECISCOSTACKWISE
TECHNOLOGY TOBEHAVEANDWORKTOGETHERASAUNIFIEDSYSTEM. LAYER2 AND
LAYER3 PROTOCOLSPRESENTTHEENTIRESWITCHSTACKASASINGLEENTITYTOTHE
NETWORK.
YOUMANAGETHESWITCHSTACKTHROUGHASINGLEIP ADDRESS.
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4. STACK MASTER
•STACKCREATEDBYCONNECTING SWITCHESUSINGCISCOPROPRIETARYSTACKINGCABLE
•ONESWITCHBECOMESSTACKMASTER
•ALLSWITCHESHAVETHEABILITYTOBESTACKMASTER–NOSPECIALHARDWARE/SOFTWARE
REQUIRED
•DURINGFORMATIONOFSTACK, STACKMASTERISELECTED
•THESTACKMASTERCANBESELECTEDBYASSIGNINGAUSER-CONFIGURABLEPRIORITY
•A SWITCHSTACKISIDENTIFIEDINTHENETWORKBYITSBRIDGEID AND, ITSROUTERMAC ADDRESS.
•THEBRIDGEID ANDROUTERMAC ADDRESSAREDETERMINEDBYTHEMAC ADDRESSOFTHE
STACKMASTER.
•EVERYSTACKMEMBERISUNIQUELYIDENTIFIEDBYITSOWNSTACKMEMBERNUMBER.
•THESWITCHWITHTHEHIGHESTPRIORITYVALUEBECOMESTHESTACKMASTER.
•A SWITCHRUNNINGTHEEMI SOFTWAREISTHESTACKMASTER.
•THESTACKMASTERCONTAINSTHESAVEDANDRUNNINGCONFIGURATION FILESFORTHESWITCH
STACK.
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5. SWITCH STACK MEMBERSHIP
A SWITCHSTACKHASUPTONINESTACKMEMBERSCONNECTED THROUGHTHEIR
STACKWISEPORTS. A SWITCHSTACKALWAYSHASONESTACKMASTER.
CREATINGASWITCHSTACKFROMTWOSTANDALONESWITCHES
A STANDALONESWITCHISASWITCHSTACKWITHONESTACKMEMBERTHATALSOOPERATES
ASTHESTACKMASTER. YOUCANCONNECTONESTANDALONESWITCHTOANOTHERTO
CREATEASWITCHSTACKCONTAININGTWOSTACKMEMBERS, WITHONEOFTHEMBEING
THESTACKMASTER.
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6. ADDINGASTANDALONESWITCHTOASWITCHSTACK
YOUCANCONNECTSTANDALONESWITCHESTOANEXISTINGSWITCHSTACKTOINCREASETHE
STACKMEMBERSHIP.
TIPS:
AFTERADDINGORREMOVINGSTACKMEMBERS, MAKESURETHATTHESWITCHSTACKIS
OPERATINGATFULLBANDWIDTH(32 GBPS).
MAKESURETHESWITCHESTHATYOUADDTOORREMOVEFROMTHESWITCHSTACKARE
POWEREDOFF.
Prepared by: iTawy Team 2015

7. STACK MASTER ELECTION AND RE-
ELECTION
THESTACKMASTERISELECTEDORRE-ELECTEDBASEDONONEOFTHESEFACTORSANDINTHEORDER
LISTED:
•A. STACKMASTERELECTIONISBASEDONTHESTACKMEMBERPRIORITYVALUE
•B. STACKMASTERELECTIONSPECIFICALLYDETERMINEDBYTHECONFIGURATION FILE
•C. STACKMASTERELECTIONSPECIFICALLYDETERMINEDBYTHECRYPTOGRAPHICEMI SOFTWARE
•D. STACKMASTERELECTIONSPECIFICALLYDETERMINEDBYTHEEMI SOFTWARE
•E. STACKMASTERELECTIONSPECIFICALLYDETERMINEDBYTHECRYPTOGRAPHICSMI SOFTWARE
•F. STACKMASTERELECTIONSPECIFICALLYDETERMINEDBYTHEMAC ADDRESS
TIPS:
ASSUMINGTHATBOTHSTACKMEMBERSHAVETHESAMEPRIORITYVALUE, CONFIGURATION FILE,
ANDSOFTWAREIMAGE, RESTARTBOTHSTACKMEMBERSATTHESAMETIME,
THESTACKMEMBERWITHTHELOWERMAC ADDRESSISELECTEDSTACKMASTER.
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8. A STACKMASTERRETAINSITSROLEUNLESSONEOFTHESEEVENTSOCCURS:
THESWITCHSTACKISRESET.
THESTACKMASTERISREMOVEDFROMTHESWITCHSTACK.
THESTACKMASTERISRESETORPOWEREDOFF.
THESTACKMASTERHASFAILED.
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9. SWITCH STACK CONFIGURATION FILES
•THECONFIGURATION FILESRECORD
SYSTEM-LEVEL(GLOBAL) CONFIGURATION SETTINGS—SUCHASIP, STP, VLAN, ANDSNMP
SETTINGS—THATAPPLYTOALLSTACKMEMBERS
STACKMEMBERINTERFACE-SPECIFICCONFIGURATION SETTINGS, WHICHARESPECIFICFOREACHSTACK
MEMBER
NOTE:WERECOMMEND THATALLSTACKMEMBERSAREINSTALLEDWITHCISCOIOS RELEASE
12.1(14)EA1 ORLATERTOENSURETHATTHEINTERFACE-SPECIFICSETTINGSOFTHESTACKMASTERARE
SAVED, INCASETHESTACKMASTERISREPLACEDWITHOUTSAVINGTHERUNNINGCONFIGURATION TO
THESTARTUPCONFIGURATION.
IFASTACKMEMBERFAILSANDYOUREPLACEWITHITWITHANIDENTICALMODEL, THEREPLACEMENT
SWITCHAUTOMATICALLYUSESTHESAMEINTERFACE-SPECIFICCONFIGURATION ASTHEFAILEDSWITCH.
HENCE, YOUDONOTNEEDTORECONFIGURETHEINTERFACESETTINGS. THEREPLACEMENTSWITCH
MUSTHAVETHESAMESTACKMEMBERNUMBERASTHEFAILEDSWITCH.
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10. SWITCH STACK MANAGEMENT
CONNECTIVITY
YOUMANAGETHESWITCHSTACKANDTHESTACKMEMBERINTERFACESTHROUGHTHESTACKMASTER.
YOUCANUSECLUSTERMANAGEMENTSUITE(CMS), THECLI, ANDSNMP ANDCISCOWORKS
NETWORKMANAGEMENT APPLICATIONS. YOUCANNOTMANAGESTACKMEMBERSONANINDIVIDUAL
SWITCHBASIS.
•CONNECTIVITYTOTHESWITCHSTACKTHROUGHANIP ADDRESS
THESWITCHSTACKISMANAGED THROUGHASINGLEIP ADDRESS. THEIP ADDRESSISASYSTEM-LEVEL
SETTINGANDISNOTSPECIFICTOTHESTACKMASTERORTOANYOTHERSTACKMEMBER.
NOTE: STACKMEMBERSRETAINTHEIRIP ADDRESSESWHENYOUREMOVETHEMFROMASWITCH
STACK. TOAVOIDACONFLICTCHANGETHEIP ADDRESSOFTHESWITCHTHATYOUREMOVEDFROM
THESWITCHSTACK.
•CONNECTIVITYTOTHESWITCHSTACKTHROUGHANSSH SESSION
A SWITCHRUNNINGTHECRYPTOGRAPHIC VERSIONOFTHESMI OREMI SOFTWAREISTHESTACK
MASTER.
NOTE: ENCRYPTIONFEATURESAREUNAVAILABLEIFTHESTACKMASTERISRUNNINGTHE
NONCRYPTOGRAPHIC VERSIONOFTHESMI OREMI SOFTWARE.
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11. •CONNECTIVITYTOTHESWITCHSTACKTHROUGHCONSOLEPORTS
YOUCANCONNECTTOTHESTACKMASTERTHROUGHTHECONSOLEPORTOFONEORMORE
STACKMEMBERS.
NOTE: WERECOMMEND USINGONLYONECLI SESSIONWHENMANAGING THESWITCHSTACK.
•CONNECTIVITYTOSPECIFICSTACKMEMBERS
IFYOUWANTTOCONFIGUREASPECIFICSTACKMEMBERPORT, YOUMUSTINCLUDETHESTACK
MEMBERNUMBERINTHECLI COMMAND INTERFACENOTATION.
FOREXAMPLE, SWITCH-2# ISTHEPROMPTINPRIVILEGEDEXEC MODEFORSTACKMEMBER2,
ANDTHESYSTEMPROMPTFORTHESTACKMASTERISSWITCH. ONLYTHESHOWANDDEBUG
COMMANDS AREAVAILABLEINACLI SESSIONTOASPECIFICSTACKMEMBER.
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12. STACK MEMBER NUMBERS / PRIORITY VALUES
•STACKMEMBERNUMBERS
THESTACKMEMBERNUMBER(1 TO9) IDENTIFIESEACHMEMBERINTHESWITCHSTACK. THEMEMBER
NUMBERALSODETERMINESTHEINTERFACE-LEVELCONFIGURATION THATASTACKMEMBERUSES. YOU
CANDISPLAYTHESTACKMEMBERNUMBERBYUSINGTHESHOWSWITCHUSEREXEC COMMAND.
NOTE:IFYOUMANUALLYCHANGETHENUMBEROFASTACKMEMBERANDNOINTERFACE-LEVEL
CONFIGURATION ISASSOCIATEDWITHTHATNEWMEMBERNUMBER, THATSTACKMEMBERRESETSTOITS
DEFAULTCONFIGURATION.
•STACKMEMBERPRIORITYVALUES
A HIGHERPRIORITYVALUEFORASTACKMEMBERINCREASESITSLIKELIHOODTOBEELECTEDSTACK
MASTERANDTORETAINITSSTACKMEMBERNUMBER. THEPRIORITYVALUECANBE1 TO15. THEDEFAULT
PRIORITYVALUEIS1. YOUCANDISPLAYTHESTACKMEMBERPRIORITYVALUEBYUSINGTHESHOW
SWITCHUSEREXEC COMMAND.
NOTE:WERECOMMEND ASSIGNINGTHEHIGHESTPRIORITYVALUETOTHESWITCHTHATYOUPREFERTO
BETHESTACKMASTER. THISENSURESTHATTHESWITCHISRE-ELECTEDASSTACKMASTERIFARE-ELECTION
OCCURS.
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13. ASSIGNING STACK MEMBER INFORMATION
CONFIGURATIONINFORMATION:
DEFAULTSWITCHSTACKCONFIGURATION
ASSIGNINGASTACKMEMBERNUMBER(OPTIONAL)
SETTINGTHESTACKMEMBERPRIORITYVALUE(OPTIONAL)
ACCESSINGTHECLI OFASPECIFICSTACKMEMBER(OPTIONAL)
DEFAULTSWITCHSTACKCONFIGURATION
FEATURE DEFAULTSETTING
STACKMEMBERNUMBER 1
STACKMEMBERPRIORITYVALUE 1
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14. ASSIGNING A STACK MEMBER NUMBER
Command Purpose
Step 1configure terminal Enter global configuration mode.
Step 2
switch current-stack-member-number
renumber new-stack-member-number
Specify the current stack member number and the new stack
member number for the stack member. The stack member
number range is 1 to 9. You can display the current stack
member number by using the show switch user EXEC
command.
Step 3end Return to privileged EXEC mode.
Step 4reload slot stack-member-number Reset the stack member, and apply this configuration change.
Step 5show switch Verify the stack member number.
Note: This task is available only from the stack master.
In global configuration mode
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15. SETTING THE STACK MEMBER PRIORITY
VALUE
Command Purpose
Step 1 configure terminal Enter global configuration mode.
Step 2
switch stack-member-
number priority priority-
number
Specify the stack member number and the priority for the stack member.
The stack member number range is 1 to 9. The priority value range is 1 to
15. You can display the current priority value by using the show switch user
EXEC command. The new priority value takes effect immediately but does
not affect the current stack master. The new priority value helps determine
which stack member is elected as the new stack master when the current
stack master or switch stack resets.
Step 3 end Return to privileged EXEC mode.
Step 4
show switch stack-
member-number Verify the stack member priority value.
Note: This task is available only from the stack master.
In global configuration mode
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16. ACCESSING THE CLI OF A SPECIFIC STACK MEMBER
YOUCANACCESSALLORSPECIFICSTACKMEMBERSBYUSINGTHEREMOTECOMMAND {ALL|
STACK-MEMBER-NUMBER} PRIVILEGEDEXEC COMMAND.
THESTACKMEMBERNUMBERRANGEIS1 TO9.
YOUCANACCESSSPECIFICSTACKMEMBERSBYUSINGTHESESSIONSTACK-MEMBER-NUMBER
PRIVILEGEDEXEC COMMAND.
THESTACKMEMBERNUMBERRANGEIS1 TO9.
THESTACKMEMBERNUMBERISAPPENDEDTOTHESYSTEMPROMPT.
NOTE:THISTASKISAVAILABLEONLYFROMTHESTACKMASTER. THISTASKISONLYFORDEBUGGING
PURPOSES.
Prepared by: iTawy Team 2015

17. FOR EXAMPLE:
WNISW01#SESSION?
<1-9> SWITCHNUMBER
WNISW01#SESSION3
WNISW01-3#SHVER
WNISW01-3 UPTIMEIS9 WEEKS, 3 DAYS, 20 HOURS, 7 MINUTES
SYSTEMRETURNEDTOROM BYPOWER-ON
SYSTEMRESTARTEDAT12:53:52 NZDT SUNDEC14 2008
SYSTEMIMAGEFILEIS"FLASH:/C3750-IPBASEK9-MZ.122-44.SE.BIN"
WNISW01-3#CONFT
^
% INVALIDINPUTDETECTEDAT'^' MARKER.
WNISW01-3# EXIT/ Q[ COMMAND TOCOMEOUTFROMTHEMEMBERMODETOSTACKMASTER]
•WNISW01#
NOTE:ONLYTHESHOWANDDEBUGCOMMANDS AREAVAILABLEINACLI SESSIONTOASPECIFICSTACKMEMBER.
Prepared by: iTawy Team 2015

18. DISPLAYING INFORMATION ABOUT THE SWITCH STACK
COMMANDS TODISPLAYTHECONFIGURATION CHANGESTHATYOUSAVEAFTERYOURESETASPECIFICSTACKMEMBERORTHESWITCHSTACK.
WNISW01#SHSWITCHDETAIL
SWITCH/STACKMACADDRESS: 0013.60E6.B880
H/W CURRENT
SWITCH# ROLE MACADDRESS PRIORITYVERSIONSTATE
----------------------------------------------------------
*1 MASTER0013.60E6.B880 15 0 READY
2 MEMBER0013.7FDB.4300 1 0 READY
3 MEMBER001A.A25F.9D00 1 0 READY
4 MEMBER001C.0E3E.BD00 1 0 READY
STACKPORTSTATUS NEIGHBORS
SWITCH# PORT1 PORT2 PORT1 PORT2
--------------------------------------------------------
1 OK OK 2 4
2 OK OK 3 1
3 OK OK 4 2
4 OK OK 1 3
Prepared by: iTawy Team 2015

19. CISCO CATALYST 3750-E MODELS
PoE and data only options
Any 3750-E model can be connectedwith another through StackWise Plus
3750-E models can be combined in astack with existing 3750 models in amixed stack
24 10/100/1000T Ports + 2x 10GE
48 10/100/1000T Ports + 2x 10GE
24 10/100/1000T Ports w/POE + 2x 10GE
48 10/100/1000T Ports w/POE + 2x 10GE
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20. FEATURES
Ease of Use and Deployment
Cisco EnergyWise
Availability and Scalability
>Superior Redundancy for Fault Backup
>High-Performance IP Routing
>Integrated Cisco IOS Software Features for Bandwidth Optimization
>Scalable Stacking
QoSand Control
>Advanced QoS
>Granular Rate Limiting
Network Security
>NetworkwideSecurity Features
Manageability
>Superior Manageability
>Cisco Network Assistant Software
>Smartports
Easy Web Setup
CiscoWorksSupport
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22. THANKS…
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