Инструкции По Установке для 3com S7906E

 

1-10 

Enable LB 

cfd loopback 
service-instance instance-id 
mep mep-id { target-mep 
target-mep-id | target-mac 
mac-address } [ number 
number ] 

Required 

Disabled by default 

 

LT can trace the path between the specified MEP and the target MEP, and can also locate link faults by 

sending LT messages automatically. The two functions are implemented in the following way: 

z 

To implement the first function, the specified MEP first sends LTM messages to the target MEP. 

Based on the LTR messages in response to the LTM messages, the path between the two MEPs 

can be identified.  

z 

In the latter case, after LT messages automatic sending is enabled, if a MEP fails to receive the 

CCMs from the remote MEP within 3.5 sending intervals, the link between the two is regarded as 

faulty and LTMs will be sent out. Based on the LTRs that echo back, the fault source can be 

located. 

Before configuring this function, you should first complete MEP and MIP configuration tasks. 

Follow these steps to find the path between a source MEP and a target MEP:

Enter system view 

— 

Find the path between a source 
MEP and a target MEP 

cfd linktrace 
service-instance instance-id 
mep mep-id { target-mep 
target-mep-id | target-mac 
mac-address } [ ttl ttl-value ] 
[ hw-only ] 

Required 

 

Follow these steps to enable automatic LT messages sending: 

Enter system view 

— 

Enable automatic LT messages 
sending 

cfd linktrace auto-detection 
[ size size-value ] 

Required 

Disabled by default