topic Stack master flip in ExtremeSwitching (Other)

Stack master flip

Mike_Hammett — Sun, 12 Jul 2015 20:44:00 GMT

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?

RE: Stack master flip

BrandonC — Sun, 12 Jul 2015 20:47:00 GMT

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

RE: Stack master flip

Mike_Hammett — Sun, 12 Jul 2015 20:48:00 GMT

Sorry, yes, Summit x400s.

RE: Stack master flip

Mike_Hammett — Sun, 12 Jul 2015 20:53:00 GMT

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 #

RE: Stack master flip

Mike_Hammett — Sun, 12 Jul 2015 21:19:00 GMT

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