Alcatel-Lucent 6850-48 参考指南
OmniSwitch CLI Reference Guide
September 2009
page 30-1
30 UDLD Commands
This chapter describes the CLI commands used to configure the UDLD (UniDirectional Link Detection)
protocol. UDLD operates at Layer 2 in conjunction with IEEE 802.3 Layer 1 fault detection mechanism. It
is a protocol used for detecting and disabling unidirectional Ethernet fiber or copper connections to avoid
interface malfunctions, Spanning Tree loops, media faults, etc. It operates in two main modes normal and
aggressive.
protocol. UDLD operates at Layer 2 in conjunction with IEEE 802.3 Layer 1 fault detection mechanism. It
is a protocol used for detecting and disabling unidirectional Ethernet fiber or copper connections to avoid
interface malfunctions, Spanning Tree loops, media faults, etc. It operates in two main modes normal and
aggressive.
The two basic mechanisms that UDLD follows are:
• Advertises port's identity and learns about its neighbors. This information is maintained in a cache
table.
• It sends continuous echo messages when fast notifications are required.
MIB information for the UDLD commands is as follows:
Filename:
AlcatelIND1UDLD.mib
Module:
ALCATEL-IND1-UDLD-MIB
A summary of available commands is listed here:
Configuration procedures for UDLD are explained in the “Configuring UDLD” chapter of the OmniSwitch
AOS Release 6 Network Configuration Guide.
AOS Release 6 Network Configuration Guide.