Udld (Ethernet) - Cisco Nexus 5000 Series Command Reference Manual

udld (Ethernet)

udld (Ethernet)
To enable and configure the Unidirectional Link Detection (UDLD) protocol on an Ethernet interface, use
the udld command. To disable UDLD, use the no form of this command.
udld {aggressive| disable| enable}
no udld {aggressive| disable| enable}
Syntax Description
aggressive
disable
enable
Command Default
None
Command Modes
Interface configuration mode
Command History
Release
4.0(1a)N1(1)
Usage Guidelines
You can configure normal or aggressive UDLD modes for an Ethernet interface. Before you can enable a
UDLD mode for an interface, you must make sure that UDLD is enabled on the switch. UDLD must also be
enabled on the other linked interface and its device.
To use the normal UDLD mode on a link, you must configure one of the ports for normal mode and configure
the port on the other end for the normal or aggressive mode. To use the aggressive UDLD mode, you must
configure both ends of the link for aggressive mode.
Examples
This example shows how to enable the normal UDLD mode for an Ethernet port:
switch# configure terminal
switch(config)# interface ethernet 1/1
switch(config-if)# udld enable
This example shows how to enable the aggressive UDLD mode for an Ethernet port:
switch(config-if)# udld aggressive
This example shows how to disable UDLD for an Ethernet port:
switch(config-if)# udld disable
Cisco Nexus 5000 Series Interfaces Command Reference
182
Enables UDLD in aggressive mode on the interface.
Disables UDLD on the interface.
Enables UDLD in normal mode on the interface.
Modification
This command was introduced.
U and V Commands