Users Guide

Layer 2 Switching Commands 843
Command History
Modified in version 6.5 firmware.
Example
The output of the show udld all command must (at least) show the err-
disable status for UDLD err-disabled interfaces and shutdown for the
administratively disabled interfaces.
console#show udld all
Interface Admin Mode UDLD Mode UDLD Status
--------- ---------- ----------- ----------------
Gi1/0/1 Enabled Aggressive Err-disabled (Link Down)
Gi1/0/2 Enabled Aggressive UDLD Err-disabled
Gi1/0/3 Enabled Aggressive Shutdown (Link Down)
Gi1/0/4 Disabled Normal Not Applicable
Gi1/0/5 Disabled Normal Not Applicable
UDLD Status The status of the link as determined by UDLD. The options
are:
• Undetermined – UDLD has not collected enough information
to determine the state of the port.
• Not applicable – UDLD is disabled, either globally or on the
port.
• Shutdown – UDLD has detected a unidirectional link and
shutdown the port. That is, the port is in the D-Disable state.
• Bidirectional - UDLD has detected a bidirectional link.
• Undetermined (Link Down) – The port transitions into this
state when the port link physically goes down due to any
reasons other than the port being put into D-Disable mode by
the UDLD protocol on the switch.
Field Description