Default Udld Configuration; Configuration Guidelines - Cisco IE 3000 Software Configuration Manual

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Configuring UDLD

Default UDLD Configuration

Default UDLD Configuration

UDLD global enable state

UDLD per-port enable state for fiber-optic media

UDLD per-port enable state for twisted-pair (copper) media

UDLD aggressive mode

These are the UDLD configuration guidelines:

Loop guard works only on point-to-point links. We recommend that each end of the link has a directly

connected device that is running STP.

Cisco IE 3000 Switch Software Configuration Guide

shows the default UDLD configuration.

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.

Default Setting

Globally disabled

Disabled on all Ethernet fiber-optic ports

Disabled on all Ethernet 10/100 and 1000BASE-TX ports

Configuring UDLD

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