Stacking VSP7000

[ncrncevic]

Hello 

We have problems with 2 x VSP 7024 switchs

they have been working over 2 years in a Stack Configuration. 

Our costumer have now problem that the Stack in not more working as an stack, each switch works alone 

We have see some problems with the Stacking cable, can a stack of two switches work with only one cable ? 

Ragrds

CoreSwitch-KG#enable
CoreSwitch-KG#show stack forced-mode
Forced-Stack Mode: Disabled
Device is not currently running in forced stack mode.
CoreSwitch-KG#

CoreSwitch-KG#show stack reboot-on-failure
Stack Reboot on Failure: Enabled
CoreSwitch-KG#

CoreSwitch-KG#show stack-info uptime
Unit# Switch Model     Unit UpTime         
----- ---------------- --------------------
1     7024XLS          0 days, 04:32:18
2     7024XLS          0 days, 04:32:22

CoreSwitch-KG#show stack-monitor 
Status: disabled
Stack size: 2
Trap interval: 60

CoreSwitch-KG#show stack health

------------------------------------------------------------------------------
UNIT#            Switch Model       Cascade Up            Cascade Down
------------------------------------------------------------------------------
1 (Base)          7024XLS           OK                    LINK DOWN or MISSING
2                 7024XLS           LINK DOWN or MISSING  OK                  

------------------------------------------------------------------------------
Switch Units Found = 2
Stack Health Check = WARNING - NON-RESILIENT
Stack Diagnosis = Stack in non-resilient mode.
Recommend to add/replace the identified cable(s).

Unit# Switch Model     MDA type    Pluggable Pluggable Pluggable SW Version
                                     Port      Port      Port              
----- ---------------- ----------- --------- --------- --------- ----------
1     7024XLS          None        (1 ) Unsp (2 ) None (3 ) SR   v10.4.0.003
                                   (4 ) SR   (5 ) SR   (6 ) None 
                                   (7 ) None (8 ) SR   (9 ) None 
                                   (10) None (11) SR   (12) None 
                                   (13) SR   (14) None (15) None 
                                   (16) None (17) SR   (18) None 
                                   (19) SR   (20) None (21) None 
                                   (22) None (23) None (24) Dir. 
2     7024XLS          None        (1 ) SR   (2 ) SR   (3 ) None v10.4.0.003
                                   (4 ) None (5 ) None (6 ) SR   
                                   (7 ) SR   (8 ) None (9 ) SR   
                                   (10) None (11) None (12) None 
                                   (13) None (14) None (15) SR   
                                   (16) None (17) None (18) None 
                                   (19) SR   (20) None (21) None 
                                   (22) SX   (23) None (24) Dir. 
 

[Ludovico_Steven]

VSP7024 stacking uses dual parallel cable runs; which means a stack of 2 has a total of 4 stacking cables.

To build the stack you need all the cables. I tried a few months back with one cable missing to form a stack of 4and the result was a failure. Of course if the stack is already formed, then failure of a stacking cable should not be a problem.

[EXTR_Paul]

To the best of my knowledge 10.4.0 is no longer supported.  And its very old.

I would upgrade to 10.4.6 and see if it solves the problem

https://extremeportal.force.com/ExtrDownloadDetail?id=a4134000000ZHcAAAW

[ncrncevic]

Is there any further information on the loopback-testing feature for stacking?

stack loopback—test internal

stack loopback—test external

For external (checking the cables) do I have to connect the cable to the upper UP port and the upper DOWN port on the same switch, or how ist he cabling?