Administrator Guide

Layer 2 Switching Commands 794
a When there is a loopback, the device ID and port ID sent out on a
port is received back.
b UDLD PDU is received from a partner does not have its own details
(echo).
c Bidirectional connection is established and no UDLD packets are
received from the partner device within three times the message
interval.
d In aggressive mode, when the partner does not respond to an ECHO
within 7 seconds.
Commands in this Section
This section explains the following commands:
udld enable (Global Configuration)
Use the udld enable command in Global Configuration mode to enable
UDLD on all physical interfaces on a switch.
Use the no form of the command to disable UDLD on all interfaces.
Syntax
udld enable
no udld enable
Default Configuration
UDLD is disabled by default.
Command Mode
Global Configuration mode
udld enable (Global Configuration) udld enable (Interface Configuration)
udld reset udld port
udld message time show udld
udld timeout interval
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2CSNXXX_SWUM204.book Page 794 Monday, January 25, 2016 1:25 PM