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Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBMBladeCenter, Software Configuration Guide
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Chapter16 Configuring UDLD
Configuring UDLD
Configuring UDLD
This section describes how to configure UDLD on your switch. It contai ns this configuration
information:
•Default UDLD Configuration, page 16-4
•Configuration Guidelines, page 16-4
•Enabling UDLD Globally, page 16-5
•Enabling UDLD on an Interface, page 16-6
•Resetting an Interface Shut Down by UDLD, page 16-6

Default UDLD Configuration

Table16-1 shows the de fault UDLD configuration.
Configuration Guidelines
These are the UDLD configuration guidelines:
•A UDLD-capable interface also cannot detect a unidirectional link if it is connected to a
UDLD-incapable port of another switch.
•When configuring the mode (normal or aggressive), make sure that the same mode is configured on
both sides of the link.
Table16-1 Default UDLD Configuration
Feature Default Setting
UDLD global enable state Globally disabled
UDLD per-interface enable state for fiber-optic media Disabled on all Ethernet fiber-optic interfaces
UDLD per-interface enable state for twisted-pair (copper)
media
Disabled on all 1000BASE-TX interfaces
UDLD aggressive mode Disabled