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Catalyst 3750-X and 3560-X Switch Command Reference
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Chapter 2 Catalyst 3750-X and 3560-X Cisco IOS Commands
show switch
This example shows how to display detailed stack-ring activity information for a switch stack:
Switch> show switch stack-ring activity detail
Ta b l e 2-49 show switch stack-ports summary Command Output
Field Description
Switch#/Port# Member number and its stack port number.
Stack Port Status • Absent—No cable is detected on the stack
port.
• Down—A cable is detected, but either no
connected neighbor is up, or the stack port is
disabled.
• OK—A cable is detected, and the connected
neighbor is up.
Neighbor Switch number of the active member at the other
end of the stack cable.
Cable Length 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.
Link OK 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.
Link Active 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.
Sync OK • 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.
# Changes to LinkOK 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.
In Loopback • 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.
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