3com WX3000 Manuel D’Utilisation

 

1-6 

A DLDP neighbor can be in one of these two states: two way and unknown. You can check the state of 

a DLDP neighbor by using the display dldp command. 

Table 1-7 Description on the two DLDP neighbor states 

two way 

The link to the neighbor operates properly. 

unknown 

The device is detecting the neighbor and the neighbor state is 
unknown. 

 

z 

DLDP works only when the link is up. 

z 

To insure unidirectional links can be detected, you must make sure: DLDP is enabled on both ends, 

and the interval of sending advertisement packets, authentication mode and password are 

consistent on both ends. 

z 

You can adjust the interval of sending advertisement packets in different network circumstances, 

so that DLDP can respond rapidly to link failure. The interval must be shorter than one-third of the 

STP convergence time, which is generally 30 seconds. If too long an interval is set, an STP loop 

may occur before DLDP shut down unidirectional links. On the contrary, if too short an interval is 

set, network traffic increases, and port bandwidth is reduced.  

z 

DLDP does not process any LACP event, and treats each link in the aggregation group as 

independent. 

Follow these steps to configure DLDP: 

Enter system view 

system-view 

— 

Enable DLDP globally 

dldp enable 

Enter 
Ethernet port 
view 

Interface interface-type 
interface-number  

Enable 
DLDP 

Enable 
DLDP on 
a port 

Enable 
DLDP on a 
port 

dldp enable 

Required. By 
default, DLDP is 
disabled 

Set the authentication mode and 
password 

dldp authentication-mode 
{ none | simple simple-password 
| md5 md5-password } 

Optional. By 
default, the 
authentication 
mode is none 

Set the interval of sending DLDP packets

dldp interval integer 

Optional. By 
default, the 
interval is 5 
seconds.