show udld unit/slot/port

This command displays the UDLD settings for the specified unit/slot/port. If the all keyword is entered, it displays information for all ports.

Format	`show udld {unit/slot/port \| all}`
Mode	User EXEC Privileged EXEC

Parameter	Description
Port	The identifying port of the interface.
Admin Mode	The administrative mode of UDLD configured on this interface. This is either `Enabled` or `Disabled`.
UDLD Mode	The UDLD mode configured on this interface. This is either `Normal` or `Aggressive`.
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 an errDisabled state. Bidirectional – UDLD has detected a bidirectional link. Undetermined (Link Down) – The port would transition into this state when the port link physically goes down due to any reasons other than the port been put into D-Disable mode by the UDLD protocol on the switch.

Example: The following shows example CLI display output for the command.

(Switching) #show udld 0/1

Port     Admin Mode   UDLD Mode     UDLD Status
-----    ----------   -----------   --------------
0/1      Enabled      Normal        Not Applicable

Example: The following shows example CLI display output for the command.

(Switching) #show udld all

Port     Admin Mode   UDLD Mode     UDLD Status
-----    ----------   -----------   --------------
0/1      Enabled      Normal        Shutdown
0/2      Enabled      Normal        Undetermined
0/3      Enabled      Normal        Bidirectional
0/4      Enabled      Normal        Not Applicable
0/5      Enabled      Normal        Not Applicable
0/6      Enabled      Normal        Not Applicable
0/7      Enabled      Normal        Not Applicable
0/8      Enabled      Normal        Shutdown
0/9      Enabled      Normal        Not Applicable
0/10     Enabled      Normal        Not Applicable
0/11     Enabled      Normal        Not Applicable
0/12     Enabled      Normal        Undetermined
0/13     Enabled      Normal        Bidirectional
0/14     Disabled     Normal        Not Applicable
0/15     Disabled     Normal        Not Applicable
0/16     Disabled     Normal        Not Applicable
0/17     Disabled     Normal        Not Applicable
0/18     Disabled     Normal        Not Applicable
0/19     Disabled     Normal        Not Applicable
0/20     Disabled     Normal        Not Applicable
--More-- or (q)uit
(Switching) #