Displaying information on stack connections
You can check the data connections between stack units with the show stack connection command.
When the show stack connection command output includes the message *** error: one-way, this may indicate a stack port to non-stack-port connection. When this occurs, the side of the connection that is incorrectly configured as a stack port must be converted to a data port.
In the following example, the show stack connection command output indicates that CPU-to-CPU connections are working properly between all 12 members of the stack.
ICX7750-48F Router# show stack connection
Probing the topology. Please wait ...
ICX7750-48F Router#
active
+---+ +---+ +---+ +---+ +---+ +---+
-2/1| 1 |2/4--3/1| C |3/4==2/1| B |2/4==2/1| A |2/4--2/1| 9 |2/4--2/1| 8 |2/4-
| +---+ +---+ +---+ +---+ +---+ +---+ |
| |
| standby |
| +---+ +---+ +---+ +---+ +---+ +---+ |
-2/4| 2 |2/1--2/4| 3 |2/1--2/4| 4 |2/1==2/4| 5 |2/1--2/4| 6 |2/1==2/4| 7 |2/1-
+---+ +---+ +---+ +---+ +---+ +---+
trunk probe results: 12 links
Link 1: u1 -- u2, num=1
1: 1/2/1 (P0) <---> 2/2/4 (P1)
Link 2: u1 -- u12, num=1
1: 1/2/4 (P1) <---> 12/3/1 (P0)
Link 3: u2 -- u3, num=1
1: 2/2/1 (P0) <---> 3/2/4 (P1)
Link 4: u3 -- u4, num=1
1: 3/2/1 (P0) <---> 4/2/4 (P1)
Link 5: u4 -- u5, num=2
1: 4/2/1 (T0) <---> 5/2/4 (T1)
2: 4/2/2 (T0) <---> 5/2/5 (T1)
Link 6: u5 -- u6, num=1
1: 5/2/1 (P0) <---> 6/2/4 (P1)
Link 7: u6 -- u7, num=3
1: 6/2/1 (T0) <---> 7/2/4 (T1)
2: 6/2/2 (T0) <---> 7/2/5 (T1)
3: 6/2/3 (T0) <---> 7/2/6 (T1)
Link 8: u7 -- u8, num=1
1: 7/2/1 (P0) <---> 8/2/4 (P1)
Link 9: u8 -- u9, num=1
1: 8/2/1 (P0) <---> 9/2/4 (P1)
Link 10: u9 -- u10, num=1
1: 9/2/1 (P0) <---> 10/2/4 (P1)
Link 11: u10 -- u11, num=2
1: 10/2/1 (T0) <---> 11/2/4 (T1)
2: 10/2/2 (T0) <---> 11/2/5 (T1)
Link 12: u11 -- u12, num=2
1: 11/2/1 (T0) <---> 12/3/4 (T1)
2: 11/2/2 (T0) <---> 12/3/5 (T1)
CPU to CPU packets are fine between 12 units.