Dldp Configuration; Overview; Background - 3Com 4500G Family Configuration Manual

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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
Overview

Background

Sometimes, unidirectional links appear in
packets from the other end but the other end cannot. For example, if two switches, Switch A and Switch
B, are connected via a fiber pair, one used for sending packets from A to B and the other for sending
packets from B to A, the link between the two switches is a bidirectional link (two-way link). If one of
these fibers gets broken, the link becomes a unidirectional link (one-way link).
Unidirectional links result in problems such as loops in an STP-enabled network.
There are two types of unidirectional fiber links. One occurs when fibers are cross-connected, and the
other occurs when one end of a fiber is not connected or one fiber of a fiber pair gets broken.
shows a correct fiber connection and two types of unidirectional fiber connection.
networks. On a unidirectional link, one end can receive
1-1
Figure 1-1.