Switch leaving a Stack with ports Up

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Hi,


We have two stacks, each is made with 2 X670V-48t and 1 X670V-48x.
Stacking has been done using alternate ports 47 and 48.
Therefore 10G ports 45 and 49 on X670V-48t cannot be used.
No VIM.
Ports 45 to 48 are put as x in figure below:


We need to set-up a uplink 2x10G LAG between each stacked swith (SW stack1 and SW stack2) and a Juniper FW Cluster (FW1_1 and FW1_2).
In figure below, FW1_1 is Active while FW1_2 is Standby.
As no VIM module available on X670V-48t, the only way to do this is to establish this LAG between X670V-48x 
and FW:


SW stack1                        SW stack2
-------------------------------    -------------------------------
                              x x                                      x x
 X670V-48t            x x       X670V-48t              x x
-------------------------------    -------------------------------
                              x x
 X670V-48t            x x       X670V-48t              x x
-------------------------------    -------------------------------
                              x x                                      x x
 X670V-48x           x x        X670V-48x             x x
-------------------------------    -------------------------------
     3:10 3:11                              3:10 3:11
        |        |                                     |       |
       2x10G                                  2x10G
        |       |                                    |      |
       FW1_1                                 FW1_2

Suppose 3rd switch X670V-48x in the SW stack 1 leaves the Stack, while having its port 3:10 and 3:11 always Up. 
FW1_1 will stay Active.

Is there a way to disable ports 3:10 and 3:11 is that condition, e.g. when switch 3 leaves Stack ? 
This will force FW1_2 to become active via the other Stack.

Thanks, and kind regards,
Estelle Sonnic
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Sonnic

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Posted 3 months ago

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