Ports in 2 switch 2960x stack are showing down

[hmc2500]

Some ports in a 2 switch 2960x stack are showing down. The stack is cabled as the pic below. Any idea why the ports are showing down? The IOS versions are the same.

Switch#sh sw de
Switch/Stack Mac Address : 70d3.79b2.1780
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master 70d3.79b2.1780 15 4 Ready
2 Member cc8e.719d.fa00 1 4 Ready

Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
--------------------------------------------------------
1 Ok Down 2 None
2 Down Ok None 1

Switch#

##sh switch neighbor
Switch # Port 1 Port 2
-------- ------ ------
1 2 None
2 None 1

Switch#

[paul driver · Accepted solution]

Hello

Most probably faulty stack cable or it isnt attached correctly, Remove it and reset the cable, also make sure the stack port is actually enabled.

switch x stack port x enable 

[hmc250000]

ll check the cables tomorrow but what is the command exactly? Tried the following to no avail.

Switch(config)#stack ?
% Ambiguous command: "stack "
Switch(config)#switch stack ?
port-speed Change switch stack port speed

Switch(config)#switch stack po
Switch(config)#switch stack port-speed ?
10 Change stack speed to 10G

switch(config)#switch stack port-speed 10 ?
<cr>

Switch(config)#stack ?
% Ambiguous command: "stack "
Switch(config)#switch stack ?
port-speed Change switch stack port speed

switch(config)#switch stack

[Leo Laohoo · Accepted solution]

Stacking cable could be faulty.

[paul driver]

Switch x stack port x enable

[hmc2500]

WE verified, stacking cables were not seated properly. Thanks!

[Leo Laohoo]

Thanks for providing us with the update and follow-up.