Cisco 3750G - Catalyst Integrated Wireless LAN Controller

27-4
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 27 Configuring UDLD
Configuring UDLD
Configuring UDLD
These sections contain this configuration information:
• Default UDLD Configuration, page 27-4
• Configuration Guidelines, page 27-4
• Enabling UDLD Globally, page 27-5
• Enabling UDLD on an Interface, page 27-6
• Resetting an Interface Disabled by UDLD, page 27-6
Default UDLD Configuration
Table 27-1 shows the default UDLD configuration.
Configuration Guidelines
These are the UDLD configuration guidelines:
• UDLD is not supported on ATM ports.
• A UDLD-capable port 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.
Table 27-1 Default UDLD Configuration
Feature Default Setting
UDLD global enable state Globally disabled
UDLD per-port enable state for fiber-optic media Disabled on all Ethernet fiber-optic ports
UDLD per-port enable state for twisted-pair (copper) media Disabled on all Ethernet 10/100 and 1000BASE-TX ports
UDLD aggressive mode Disabled