Cisco Catalyst 250 Series Command Reference

udld reset
To reset all interfaces disabled by UniDirectional Link Detection (UDLD) and permit traffic to begin passing
through them again (though other features, such as spanning tree, Port Aggregation Protocol (PAgP), and
Dynamic Trunking Protocol (DTP) still have their normal effects, if enabled), use the udld reset command
in privileged EXEC mode.
udld reset
Syntax Description
This command has no keywords or arguments.
Command Default
None
Command Modes
Privileged EXEC
Command History
ModificationRelease
This command was introduced.Cisco IOS 15.0(2)EX
Usage Guidelines
If the interface configuration is still enabled for UDLD, these ports begin to run UDLD again and are disabled
for the same reason if the problem has not been corrected.
Examples
This example shows how to reset all interfaces disabled by UDLD:
Switch# udld reset
1 ports shutdown by UDLD were reset.
Related Commands
DescriptionCommand
Displays UDLD administrative and operational status for all ports or the specified
port.
show udld
Enables aggressive or normal mode in UDLD or sets the configurable message
timer time.
udld
Enables UDLD on an individual interface or prevents a fiber-optic interface from
being enabled by the udld global configuration command.
udld port
Catalyst 2960-X Switch Layer 2 Command Reference, Cisco IOS Release 15.0(2)EX
OL-29043 -01 125
Layer 2 Commands
udld reset

Cisco Catalyst 250 Series Specifications

General

Brand	Cisco
Model	Catalyst 250 Series
Category	Switch
Language	English