3com S7906E インストール手順

 

1-10 

Set DLDP mode  

dldp work-mode { enhance | 
normal } 

Optional 

Normal by default 

 

You can set the interval for sending Advertisement packets to enable unidirectional links to be detected 

in time. 

Follow these steps to set the interval for sending Advertisement packets: 

Enter system view 

— 

Set the interval for 
sending Advertisement 
packets 

dldp interval time 

Optional 

5 seconds by default 

 

z 

The interval for sending Advertisement packets applies to all DLDP-enabled ports. 

z 

Set the interval for sending Advertisement packets to a value no longer than one-third of the STP 

convergence time. If the interval is too long, STP loops may occur before unidirectional links are 

torn down, and it takes a long time for the device to detect unidirectional links, thus causing more 

traffic forwarding errors; if the interval is too short, unnecessary Advertisement packets can be 

generated to consume bandwidth. Therefore, you are recommended to use the default value.  

z 

To enable DLDP to operate properly, make sure the intervals for sending Advertisement packets 

on both sides of a link are the same.  

 

On some ports, when the Tx line fails, the port goes down and then comes up again, causing optical 

signal jitters on the Rx line. When a port goes down due to a Tx failure, the device transits to the 

DelayDown state instead of the Inactive state to prevent the corresponding neighbor entries from being 

removed. In the same time, the device triggers the DelayDown timer. If the port goes up before the timer 

expires, the device restores the original state; if the port remains down when the timer expires, the 

devices transits to the Inactive state.

 

Follow these steps to set the DelayDown timer 

Enter system view 

— 

Set the DelayDown timer 

dldp delaydown-timer time 

Optional 

1 second by default