2960x dropping from stack, but still there

[danielglenn]

We have several stacks of 2960x switches. On one of them, the second switch seems to dissapear.

Switch/Stack Mac Address : 204c.9ef7.0f80
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 204c.9ef7.0f80     1      4       Ready               
 2       Member 0000.0000.0000     0      0       Removed             
 3       Member bcf1.f251.9e80     1      4       Ready               

But when we plug things into the 2nd switch, the user is fine. If we reboot the stack, it comes back. I've redone the flexstack cables in the back and rebooted. It was fine for a day or more, but when I checked again this morning it was gone again. Any ideas?

Here is what the neighbor cabling looks like when it is good.

sh switch neighbors
  Switch #    Port 1       Port 2
  --------    ------       ------
      1         3             2  
      2         1             3  
      3         2             1

And after when it drops:

sh switch nei
  Switch #    Port 1       Port 2
  --------    ------       ------
      1         3            None
      3         2             1 

[s.lachica]

Hi danielglenn,

Try to replace the stacking cable and observe. If this is not feasible, you can reseat the stacking cables and observe. You may also try swapping the cable with other working cables and observe.

On cases like this, physical stacking cable is more often the issue based on my experiences.

Regards,

[bkoch1]

I have a similar problem:

#sh switch
Switch/Stack Mac Address : f0b2.e5b7.5180
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master f0b2.e5b7.5180 15 4 Ready
2 Member 6c99.89c1.c600 1 4 Ready
3 Member 0000.0000.0000 0 0 Removed
4 Member 0000.0000.0000 0 0 Removed
5 Member 2834.a289.0680 1 4 Ready
6 Member 0000.0000.0000 0 0 Provisioned
7 Member 0000.0000.0000 0 0 Provisioned

EAD-8-1#sh switch neighbors
Switch # Port 1 Port 2
-------- ------ ------
1 5 2
2 1 4
5 3 1