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Wrong configuration of PPPOE+ new function caused 9300 connecting user dialing 678

Publication Date:  2012-11-06 Views:  49 Downloads:  0
Issue Description
Version and patch: V100R002C00SPC200+ V100R002SPH009
Topology: ME60--osn3500 transmission ----2/0/6 S9312 4/0/20---S2300---user PC
Failure:S2300 connects transmission OSN, connecting user dialing is normal, it dial 678 after add 9312 between OSN and 2300.
Alarm Information
NULL
Handling Process
1. Check the basic configuration, dial vlan pass through single layer, and s9300 learns mac correctly.
2. Check the interconnecting interface, negotiation for 1000M, full duplex, there is no packet lost and failure record on the interface, exclude the interface negotiation problem.
3. Count appointing PPPOE packet on S9300, define the data flow as follows:
traffic classifier PADI operator and
if-match l2-protocol 0x8863
if-match source-mac 2231-a235-99b1
if-match vlan-id 102
[S9312]dis traffic policy statistics in g4/0/20 in                             
Interface: GigabitEthernet4/0/20                                              
Traffic policy inbound: hw1                                                   
Rule number: 3                                                                
Current status: OK!                                                           
Board : 4                                                                     
Item                              Packets                       Bytes          
---------------------------------------------------------------------          
Matched                                 8                         544          
  +--Passed                             8                         544          
  +--Dropped                            0                           0          
    +--Filter                           0                           0          
    +--URPF                             -                           -          
    +--CAR                              0                           0          
[S9312]dis traffic policy statistics in g2/0/6 ou                             
Interface: GigabitEthernet2/0/6                                               
Traffic policy outbound: hw1                                                  
Rule number: 3                                                                
Current status: OK!                                                           
Board : 2                                                                     
Item                              Packets                       Bytes          
---------------------------------------------------------------------          
Matched                                 0                           0          
  +--Passed                             0                           0          
  +--Dropped                            0                           0          
    +--Filter                           0                           0          
    +--URPF                             -                           -          
    +--CAR                              0                           0
4. Check the configuration carefully, it configured pppoe intermediate-agent information enable command at global. This command can enable PPPOE+ function, can be used cooperating with upstream configuration pppoe uplink-port trusted. The function is PPPOE packet sending to CPU, add some location information, then forward, but it only configured the enable in scene, not trusted, so after PPPOE sent to cpu, it did not forward, cause dialing 678, the scene had no PPPOE+ need, cancel the configuration, the problem solved.
Root Cause
1. Configuration problem.
2. Interface negotiation disaccord caused packet lost.
3. PADI and PADO packet lost on 9300 device.
4. Device reason.
Suggestions
You must check the configuration carefully, for this case, besaues it did not know the PPPOE+ new function, the way for pppoe packet counting is worth to consult.

END