Removing 4 out of 6 switches in a switch stack

Hi all,
A very simple question for the group (I hope!) regarding 3750 switch stacks.
I've inherited a stack of 6 3750 switches.  I need to reduce this to two.  All of my active connections have been moved over to the remaining two switches I plan to keep.
Here is the output of the show switch
DASW01_4STACK#sh switch
Switch/Stack Mac Address : 001c.b1d9.cb80
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
1       Member 0019.2f07.ab80     1      0       Ready              
*2       Master 001c.b1d9.cb80     1      0       Ready              
3       Member 001c.b1e1.5d80     1      0       Ready              
4       Member 001c.b1f6.4a80     1      0       Ready              
5       Member 0023.eabd.3500     1      0       Ready              
6       Member 001c.0ea1.be80     13     0       Ready   
The two switches I want to keep are # 5 and #6.
As you can see, for some reason the master is not on switch 6 even though it has the highest priority.  All the switches are connected together with the proper redundant stack cables.
I've never worked with stacks before but would the actions be as simple as.
1. Backup configs!
2. Turn off switches 1 to 4 one at a time an allow for the stack to stabilize after each switch is powered down.
3. Verify that switch 6 is now the master and everything still works.
4. Turn off switch 5 & 6 and connect the stack cables of each switch to each other for redundancy (currently only one cable connects switch 5&6)
5. Turn on switch 5 & 6
Am I missing anything?
Thank you!
-Pete

Disclaimer
The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.
Liability Disclaimer
In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.
Posting
Leo Laohoo wrote:"Power off the switch that is to be added."But Joseph you are not ADDING switches.  You are REMOVING switches from a stack and re-cabling.If one was adding a new switch, then yes, I recommend the new switch is to be powered OFF before connect the stacking cable. 
Leo, an excellent point!
Powering of the switch, when "adding" to the stack, no doubt gets it to initiate itself as a stack member.
Re-cabling existing stacks members, shouldn't need that, but the question then is whether the hardware (stack connections) were designed for making "hot" (i.e. both sides powered on) connections.  If they are, then you're correct, no need to power off switch 5.

Similar Messages

  • HT1386 Since 8th May , I am not able to synchronize my iPhone with iTunes. Have tried removing previous back up data , removed all photos and videos on iPhone , switched  on and of and  reset iPhone  a million times , restarted my Mac a thousand times :(

    Since 8th May , after updating the iphone software to 5.1.1  I am not able to synchronize my iPhone with iTunes. Have tried removing previous back up datas , removed all photos and videos on iPhone , switched  on and of and  reset iPhone  a million times , restarted my Mac a thousand times Please Help !!!

    I have tried both options .. back up on this computer and also back up on icloud.
    The backingup is fine .. there is no problem .. even synchronizing songs , applications , calender , mail accounts is fine .. only the contacs are not synchronizing. The itune goes on and on .. showing synchronizing contacs .. but nothing happens. When i uncheck contacts synchronisation .. everything works fine . I have also reorganized my address book . but it does not help

  • I have problem with my iphone 5 ,when i switch on cellular my Mobil will be out of coverage and once i switch off it will be ok,what should i do ?

    i have problem with my iphone 5 ,when i switch on cellular my Mobil will be out of coverage and once i switch off it will be ok
    any body can help?

    Have you contacted your carrier to ensure cellular data is provisioned properly for your account and iPhone?

  • Spelling and grammar option is greyed out in preferences. How to switch it on ?

    'Spelling and grammar' option is greyed out in 'preferences'. How to switch it on ?

    Hi john,
    Does anyone know why its there and what its use is, and in what circumstances I can use it ?Its use to search the folders in the Business areas.
    Which version of discoverer are you using?
    The graying out of the icons might be due to the cache memory of java.go through this link for details
    [http://learndiscoverer.blogspot.com/2006/06/lost-or-grayed-out-icons-in-discoverer.html]
    hope it helps you.
    Best Wishes,
    Kranthi.

  • Help me to choose Right Core switches and Edge switches as per my Spec

    Dear All
    Please help me to choose Core and Edge switches and all required hard ware and software. 
    the spec details as per below 
    Core Switches
    1. High performance, highly scalable core switch to provide multi-10GE connectivity to various segments in the network.
    2. Switch should have redundant switch fabric and routing engines or management / supervisor modules
    3.should have separate control and forwarding planes
    4.Each switch should have redundant power supplies in N+N or N+1 fashion
    5. Must allow for two spare slots once services, management, processing modules and line cards populated
    6. Easy to manage firmware- i.e. single code type enterprise/service provider) or train, and robust operating system
    7. Supports for the VRRP, NSR, GRES, BFD, STP, MSTP, RSTP, VSTP, LACP redundancy protocols
    8. Hot plugging and removal 
    9. The switch should have native switching architecture with up to sufficient performance such that the loss of one switching fabric should not lead to degraded performance
    10. Switch should support switching at least 400Mpps
    11. Switch should be able to support 40 10Gig line rate ports in a fully redundant configuration 
    12. Chassis that can scale to 700 Gbps
    13. The proposed Backbone switch should support, but not be limited to the following Layer 3 features:
    Static ip routing
    Routing information protocol (RIP) and RIP2
    Open shortest path first (OSPF)
    IGMP v1, v2 and v3
    IGMP Snooping 
    IP multicast routing protocol 
    14. The switch should support the following features at a minimum:
    Spanning Tree 802.1D, 802.1S, 802.1W
    GVRP
    802.1x single and multi-supplicant: VLAN and ACL assignment
    Dynamic ARP Inspection (DAI), DHCP snooping, IP Source gurard
    LLDP, LLDP-MED
    802.3X, 802.3ad
    Redundant Trunk Group (RTG)
    IGMP snooping 
    Unicast static, OSPF v1/v2, RIP v1/v2
    Multicast IGMPv1/v2, PIM
    Graceful Route Engine Switchover 

    I have gone through your document and I am surprised to see MORE information in the document than what you've posted.  I am so mildly suspicious about the authenticity of the document and spreadsheet you've attached.  
    So far, based on this document, the client wants a chassis that can support up to 700 Gbps backplane.  The only candidate, other than a full-blown Nexus solution, is the 6807-X.  
    Next, the document also states dual supervisor card with two spare slots.  Good luck trying to get that much empty space on a 6807-X.  This means 6509E.  You can't use a 6513E because of line-card-to-slot limitation.  
    If you look under the heading "Edge Switching", the first sentence already makes references to 6800ia switch.
    There's also a reference stating that the product should have a 100 Gbps backplane.  You can take the 6509E chassis out of the equation.  
    So you see, I am suspicious about the authenticity of the document.  I agree with mali's and devil's recommendation that if you are serious, you would be engaging Cisco SE/AM in your region.  There are only three reasons, that I can think of, why you've posted this here.  One of them is the intended purpose of this document (and the audience).

  • Has anyone experienced the mute switch / auto-rotate switch iOS bug on their ipad?

    Has anyone experienced the mute switch / auto-rotate switch iOS bug on their ipad?
    I have experienced this on iPad 1 as well as iPad 2.
    Basically, when you set the side switch to toggle screen orientation (or mute), after a period of use I will have either my sound cease to function or the ipad screen will not orient correctly.  This depends on what i have chosen the side switch to toggle.  I am not sure what causes it.  The time it takes for the problem to appear is inconsistent. Some say it is caused by third party applications.
    One can find numerous threads on here if you search for "sound on my ipad stopped working" or "orientation not working".  It appears to be the same problem. Fudging with the toggle switch settings can fix it (but it takes a weird order to get it out of its non functioning loop). 
    Here is a thread that addresses the sound issue:  https://discussions.apple.com/message/15263298#15263298

    Its only for notifications.. it is not for sound from videos or music!

  • CiscoView not displaying all switches in a 3750-Stack

    Hi,
    I am running LMS 4.1 and have an issue with Inventory: I have a stack of four 3750 switches, but only two of them are showing up in CiscoView. If I right-click - Topology - Device Report ;  I see all four switches.
    The switches are standard 3750 switches and should be included in the Device Packages for CiscoView
    Also if I go Reports  - Detailed Device ; I see the same two devices show up under Module Information. However when I go to Reports - Device Attributes ; I see all four devices correctly displayed.
    I have tried and deleted and added the stack in CiscoPrime, but with same result.
    Any ideas what the cause and fix could be?
    Thanks

    No, the problem is not in ciscoworks but on the stacks.
    You may need to take a backup of one of the stacks, port descriptions vlans , etc, and then do a write erase.
    Next you will need to Read The F Manual to make the other stack always be the master. Something in the config registry...  -) I don't recall what or how.
    Then you can connect the 2 switches from the other stack you erased to the existing stack, and then power the new member on.
    Then you should have one stack.
    The stack IP you deleted can be removed from ciscoworks, the other will be updated.
    Then you can configure the new stack members as they were configured previously, port descriptions vlans , etc.
    Cheers,
    Michel

  • Add 3850 Switch to existing Core Stack

    Hello,
    I need to add a 3850 to our collapsed core Current setup - 5-3850 stack switches with vlans and routing enabled.
    We are in need of more ports and I purchased a 3850.
    I will add the switch to the core via a trunk port
    I will make vtp transparent
    I will configure the magt vlan 10 with an IP addess.
    QUESTION.
    After this is done, do I make the switch VTP client?
    Also, do I turn on IP routing? Or, with the trunk send all packets destined for other vlans over the trunk to the core, and the core will hanle routing?
    I am talking about routing between vlans, so user vlan 64 can talk to vlan 64.
    I have been doing routing on WAN so long I have forgotten best practices on the LAN and L3 Switching.
    OR.....
    Do I simply add this to the switch stack?
    Thank you for any help!
    -T
    Any help is appreciated.

    When you add a switch to an existing stack it gets all of its configuration from the stack master.
    Just verify it has the same IOS version installed (and doesn't have switch priority set such that it takes over as master) and plug it in via the stacking cables.
    If you're adding it as a new access switch then yes just trunk all the VLANs across the uplink to the core. If you have a VTP server setup then set your VTP domain and come up in client mode. If the routing is active on the core and your VLAN SVIs are all there, there's no need for routing on the access layer and the only SVI you need is for management (or use the dedicated management interface for out of band management in its own VRF).

  • What are the major differences between a Access Switch and Aggregation Switch w.r.t Carrier Ethernet domain?

    In a Carrier Ethernet domain,Could someone please help me understand what's the basic difference between Access Switch and Aggregation Switch both in terms of s/w and h/w functionalities. MEF deals OAM,CFM, EVC provisioning only at the access edge switches. Do we need to repeat all these at the aggregation level? or  is it just used for routing purpose? Do we have a separate Fault Management at the aggregation level?

    Duplicate posts.  :P
    Go here:  https://supportforums.cisco.com/discussion/12137156/what-are-major-differences-between-access-switch-and-aggregation-switch-wrt

  • Do I need to create ip address to another switch when i use stack?

    Good Day!
    Please help me to answer this question in my title. I have 2 switches my old switch has configure ip address and i will use stack to my another switch the old one will be the primary and new switch is the secondary do i need to configure the ip address of the new 1 or  no need? i'm totally confuse on it. I hope you can help me regarding on this matter.Thank you.

    no Need.
    Here is the procedure:
    Tips to Add a Switch as a Slave to the Stack
    To add a switch, as a slave, to a stack, complete these steps:
    Note: Make sure the switch that you add into the stack has the same IOS version as the switches in the stack. Refer to Catalyst 3750 Software Upgrade in a Stack Configuration with Use of the Command-Line Interface to upgrade the IOS in a catalyst 3750 switch.
    Change the switch priority of the switch to be added to "1".switch stack-member-number priority new-priority-valueNote: This step is optional, but it will make sure that the switch has fewer chances to become a stackmaster in the future.
    Power off the switch that is to be added.
    Make sure that the stack is fully connected so that, when you connect the new switch, the stack will be at least in half connectivity and does not partition.
    Connect the new switch to the stack with the StackWise ports.
    Power on the newly added switch.
    After the new switch comes up, issue the command show switch to verify stack membership.
    HTH
    Regards
    Inayath
    ***********Plz dont forget to rate all usefull posts*********

  • My ipod touch (5) ios6 has suddenly crash causing it not to switch off or switch on

    my ipod touch (5) ios6 has suddenly crash causing it not to switch off or switch on while i was opening the notification center

    Try:
    - iOS: Not responding or does not turn on
    - Also try DFU mode after try recovery mode
    How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
    - If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
    - Try on another computer
    - If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
    Apple Retail Store - Genius Bar       

  • Telnet from Outside switch to DMZ switch connected to ASA.

    Hi all,
    I have switch b connected to ASA  with fas0/40 under vlan 40.
    ASA connection to this switch is under Vlan 3 which is DMZ.
    OSPF is running between OSPF and DMZ switch.
    I was trying to telnet from Outside interface switch to DMZ  switch which goes through the ASA.
    My question is is it possible from Outside Switch to ping the DMZ switch or telnet to it as connection has to pass by ASA ?
    Thanks
    Mahesh

    Hello Mahesh,
    Yes, as I said on my previous post
    access-list outside_in permit tcp host outside_switch_ip host dmz_switch_ip eq 23
    access-group outside_in in interface outside
    If you want to check if everything is properly setup for that connection to work across the ASA do the following:
    packet-tracer input outside tcp outside_ip_switch 1025 dmz_switch_ip 23
    Remember to rate all of the helpful posts
    Julio

  • Same wlan both locally switched and centrally switched

    Scenario:
    1 virtual wireless controller
    50 access points, some of them some local to the controller (same site), other on remote sites, all in flexconnect mode.
    Is there a way for a wlan to be locally switched for a group of ap's, essentialy those local to the controller, and centrally switched for other groups of ap's, in fact those placed on remote sites?
    I've tried configuring flexconnect groups, and ap groups, but no luck, I've found no way to override the globally configured flag "flexconnec local switching".
    I've also tried to create two identical wlans, one locally switched and the second globally switched, but the wlc refuses to activate the second one since it has the same ssid of the first one.
    Regards,
    Massimo. 

    Since you have vWLC all AP needs to be in FlexConnect mode (If you got a normal WLC you can keep HQ AP in local mode & Remote AP in Flex mode to achieve this)
    I think in your case you have to either choose "Central Switching" or "local switching" for your APs.
    Regards
    Rasika
    **** Pls rate all useful responses ****

  • My network goes off and does not come back unless I switch off and switch on

    I have a vodafone connection.
    Whenever I go underground while traveling in train, my network goes off and but does not come back unless I switch off and switch on the phone... any suggestions???

    I would advice to perform a hard reset (holding Power button + Home button for at least 10 seconds until Apple Logo appears)

  • My iphone's screen goes black and it behaves like that it is switched off.No switches work and the power button also does not respond.The ringtone do not also respond.The only way to switch on the phone is to press  home button and  power button together.

    My iphone's screen goes black and it behaves like that it is switched off.No switches work and the power button also does not respond.The ringtone do not also respond.The only way to switch on the phone is to press  home button and  power button together.

    Pressing the Home button and the sleep/wake or on/off button together until you see the Apple logo and then release is called a reset.
    If no change after a reset, the next step is restoring your iPhone.

Maybe you are looking for

  • I can't sync Calendars after upgrading to 1.2

    I've just upgraded my iTunes to version 7 and my 5th Gen iPod to version 1.2. Before this I could sync the calendar in Outlook quite happily (I always got a warning from my security software first) Now it says that it is unable to sync the Calendar.

  • How to assign a variable value to crystal report viewer formula with CR2008

    Hi , I am using crystal reports 2008 and i am not able to find how to assign  variable value  to crystal report viewer formula. In CR 8.5 , i used to have crystalreport1.Formulas(0) = variable1                                          crystalreport1.

  • SQL Server Express 2012 SP2 installation hangs during extract phase

    Greetings! I am having an issue with trying to silent install SQL Server Express 2012 SP2 (x86). I have a proprietary installation framework, which is calling the SQL Server Express installer. The SQL Server Express installer starts extracting files

  • Error Message in version 7

    Greetings, I just installed version 7.0.0, and I got the same error message that I was getting in version 6.1.0. It's really disappointing. Shane. Z10 STL100-3 (version 10.3.1.2708) LTE Playbook (version 2.1.0.1917)

  • Will a Pixma automatically use the alternate black cartridge?

    When the 220 black cartridge in my Pixma goes empty will the printer automatically use the 221 black instead? I now have three 221 blacks on the shelf and would just as soon use them up instead of buying a 220.