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Short Maximum Packet Length of the LQMD for the OSN 6800 Causes a Service Cutover Failure

Publication Date:  2012-07-24 Views:  56 Downloads:  0
Issue Description
In a customer network, the DSLAM connects to the ADSL, which connects to the 4507 switch of company C by using fibers. The BAS is connected for Internet access. Then the previous optical channel is cut over to the OSN 6800. Use the LQMD to enable services at 100 Mbit/s. After the cutover, the customer reports that the enterprise ADSL users cannot open Web pages, but common ADSL users can.      
Alarm Information
None      
Handling Process
The maximum packet length is set to 1518. Maybe the setting of the maximum packet length is small. Change it to 9600 and then the problem is solved.      
Root Cause
According to the analysis on the interruption condition, enterprise ADSL users can dial up to access the BAS. This indicates that the transmission is normal. But these users cannot open Web pages. The comparison of users shows that enterprise ADSL users are provided with the routing function, so their packet has one more label than the packets of common users.      
Suggestions
The maximum packet length setting is preferred.      

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