Cisco Catalyst 2960 Software Configuration Manual page 207

Chapter 7 Managing Switch Stacks
Table 7-5
Field
Cable Length
Link OK
Link Active
Sync OK
# Changes to LinkOK
In Loopback
OL-26520-01
show switch stack-ports summary Command Output (continued)
Description
Valid lengths are 50 cm, 1 m, or 3 m.
If the switch cannot detect the cable length, the value is no cable. The
cable might not be connected, or the link might be unreliable.
This shows if the link is stable.
The link partner is a stack port on a neighbor switch.
No—The link partner receives invalid protocol messages from the
•
port.
Yes—The link partner receives valid protocol messages from the
•
port.
This shows if the stack port is in the same state as its link partner.
No—The port cannot send traffic to the link partner.
•
Yes—The port can send traffic to the link partner.
•
• No—The link partner does not send valid protocol messages to the
stack port.
• Yes—The link partner sends valid protocol messages to the port.
This shows the relative stability of the link.
If a large number of changes occur in a short period of time, link flapping
can occur.
No—At least one stack port on the member has an attached stack
•
cable.
Yes—None of the stack ports on the member has an attached stack
•
cable.
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
Troubleshooting Stacks
7-25