Stack master flip

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  • Updated 3 years ago
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The power dropped to my master and thus the two switches flipped roles. How do I flip them back without just power cycling the now master?
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Mike Hammett

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Posted 3 years ago

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Brandon Clay, Escalation Support Engineer

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Hi Mike,

Assuming these are Summits, you can log into the stack and run the command 'run failover' to fail over mastership to the backup. However, this will cause the current master to reboot.

-Brandon
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Mike Hammett

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Sorry, yes, Summit x400s.
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Mike Hammett

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I meant to include this in my initial post...  and forgot:




* Stk Master:36 # show stacking

Stacking Data Base
==================

Common Info
Mode       : Dup-No-Ring State   : Up-Master  Stacking  : Enabled
Master Slot: 2           Switches: 2          Local Slot: 2
Config Slot: 1           Next Potential Master Slot     : 1

Previous Stack Master : 00:04:96:18:58:46
Slot 1: State SLAVE
        Status    : Enabled  Master    : No  MAC      : 00:04:96:18:58:46
        Binding   : Active   Cpu Pri   : 15  Platform : S400-48t
        Slot-Mac  : Loose    Cfg Pri   : 15  Cfg Slot  : None
        Stacking Ports: 2
                Port-1    *1:52
                Port-2    *1:53
Slot 2: State MASTER
        Status    : Enabled  Master    : Yes MAC      : 00:04:96:34:DD:C7
        Binding   : Active   Cpu Pri   : 13  Platform : S400-48t
        Slot-Mac  : Loose    Cfg Pri   : 13  Cfg Slot  : None
        Stacking Ports: 2
                Port-1    *2:52
                Port-2    *2:53
        Fallback IP 10.1.1.6 NetMask 255.255.255.0
Slot 3: Empty

Slot 4: Empty

Slot 5: Empty

Slot 6: Empty

Slot 7: Empty

Slot 8: Empty


--------------------------------------------------------------------------------

 <*> - Indicates Stacking Enabled
 <!> - Indicates Stacking Disabled
* Stk Master:37 #
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Mike Hammett

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I reboot the second switch and the master goes back to the right switch, but the stack is still running on the fallback IP.



Stk Master:1 # show stacking

Stacking Data Base
==================

Common Info
Mode       : Dup-No-Ring State   : Up-Master  Stacking  : Enabled
Master Slot: 1           Switches: 2          Local Slot: 1
Config Slot: None        Next Potential Master Slot     : 2

Slot 1: State MASTER
        Status    : Enabled  Master    : Yes MAC      : 00:04:96:18:58:46
        Binding   : Active   Cpu Pri   : 15  Platform : S400-48t
        Slot-Mac  : Loose    Cfg Pri   : 15  Cfg Slot  : None
        Stacking Ports: 2
                Port-1    *1:52
                Port-2    *1:53
Slot 2: State SLAVE
        Status    : Enabled  Master    : No  MAC      : 00:04:96:34:DD:C7
        Binding   : Active   Cpu Pri   : 13  Platform : S400-48t
        Slot-Mac  : Loose    Cfg Pri   : 13  Cfg Slot  : None
        Stacking Ports: 2
                Port-1    *2:52
                Port-2    *2:53
        Fallback IP 10.1.1.6 NetMask 255.255.255.0
Slot 3: Empty

Slot 4: Empty

Slot 5: Empty

Slot 6: Empty

Slot 7: Empty

Slot 8: Empty


--------------------------------------------------------------------------------

 <*> - Indicates Stacking Enabled
 <!> - Indicates Stacking Disabled