Chapter 1 Dldp Configuration - H3C S5500-EI series Operation Manual

Operation Manual – DLDP
H3C S5500-EI Series Ethernet Switches

Chapter 1 DLDP Configuration

When performing DLDP configuration, go to these sections for information you are
interested in:
Overview
DLDP Configuration Task List
Enabling DLDP
Setting DLDP Mode
Setting the Interval for Sending Advertisement Packets
Setting the DelayDown Timer
Setting the Port Shutdown Mode
Configuring DLDP Authentication
Resetting DLDP State
Displaying and Maintaining DLDP
DLDP Configuration Example
Troubleshooting
1.1 Overview
A special kind of links, namely, unidirectional links, may occur in a network. When a
unidirectional link appears, the local device can receive packets from the peer device
through the link layer, but the peer device cannot receive packets from the local device.
Unidirectional link can cause problems such as loops in a Spanning Tree Protocol (STP)
enabled network.
As for fiber links, two kinds of unidirectional links exist. One occurs when fibers are
cross-connected, as shown in
not connected or one fiber of a fiber pair gets disconnected, as illustrated by the hollow
arrows in
Figure
Figure 1-2.
1-1. The other occurs when one end of a fiber is
1-1
Chapter 1 DLDP Configuration