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Knowledge Base

router down when in loop on WDM side of TN12LOG due to the wrong configuration of working mode .

Publication Date:  2012-07-25  |   Views:  138  |   Downloads:  3  |   Author:  00170814  |   Document ID:  EKB0000552928


Issue Description

Router down when in loop on wdm side of TN12LOG board.
router up when out loop on client port .
product type: osn6800 (

please refer to the attachment.

Alarm Information


Handling Process

1,we check the mode, then found it is different , problem fixed after set the right mode of board.

Root Cause

1,it is a bug.
2,the working mode of boards is different from the router.


1. what is the mode of router? 1000mfull or auto? make sure it is the same with log.

2.if you cant confirm the mode of the router, you can use command to set the mode of log to be auto ,then in loopback on wdm side to check if the router will be up.

#set working mode:


 #query working mode: