3com WX3000 Manuel D’Utilisation

 

1-1 

 

z 

The term switch used throughout this chapter refers to a switching device in a generic sense or the 

switching engine of a unified switch in the WX3000 series. 

z 

The sample output information in this manual was created on the WX3024. The output information 

on your device may vary. 

 

You may have encountered unidirectional links in networking, as shown in 

 and 

When a unidirectional link occurs, 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 links can 

cause many problems, such as spanning tree topology loop. 

Device Link Detection Protocol (DLDP) can detect the link status of the optical fiber cable or copper 

twisted pair (such as super category 5 twisted pair). If DLDP finds a unidirectional link, it disables the 

related ports automatically or informs users to disable them manually according to the configurations, to 

avoid network problems. 

Figure 1-1 Fiber cross-connection 

GE1/0/10      SwitchA       GE1/0/11

GE1/0/10      SwitchB       GE1/0/11

PC