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S8016 and NE40 cannot establish OSPF neighbor

Publication Date:  2012-07-27 Views:  37 Downloads:  0
Issue Description
S8016 and two NE40s run OSPF,but 8016 can establish the neighbor relation with only one NE40.
Alarm Information
Null
Handling Process
1.check the port status and vlan layer-3 virtual interface status, they all are UP;
2.perform ping to communicate with the peer interconnecting address, it is available;
3.check the configuring data of OSPF, it is correct;
4.at this time, use Command display ospf error to check if there is any error. We can find the HELLO packet: the statistic of netmask mismatch is increasing constantly, and then recheck the IP configuration of NE40 port and detect the mask of the interconnecting port is error, modify the submask of IP and OSPF neighbor can be established normally.
 
disp ospf error                                                   
OSPF packet error statistics:                                                  
192: IP: received my own packet           0: OSPF: wrong packet type           
   0: OSPF: wrong version                  0: OSPF: wrong checksum              
   0: OSPF: wrong area id                  0: OSPF: area mismatch               
   0: OSPF: wrong virtual link             0: OSPF: wrong authentication type   
   0: OSPF: wrong authentication key       0: OSPF: too packet small            
   0: OSPF: packet size > ip length        0: OSPF: transmit error              
   0: OSPF: interface down               135: OSPF: unknown neighbor            
5418: HELLO: netmask mismatch              0: HELLO: hello timer mismatch       

disp ospf error                                                   
OSPF packet error statistics:                                                  
192: IP: received my own packet           0: OSPF: wrong packet type           
   0: OSPF: wrong version                  0: OSPF: wrong checksum              
   0: OSPF: wrong area id                  0: OSPF: area mismatch               
   0: OSPF: wrong virtual link             0: OSPF: wrong authentication type   
   0: OSPF: wrong authentication key       0: OSPF: too packet small            
   0: OSPF: packet size > ip length        0: OSPF: transmit error              
   0: OSPF: interface down               135: OSPF: unknown neighbor            
5420: HELLO: netmask mismatch              0: HELLO: hello timer mismatch  

disp ospf error                                                   
OSPF packet error statistics:                                                  
192: IP: received my own packet           0: OSPF: wrong packet type           
   0: OSPF: wrong version                  0: OSPF: wrong checksum              
   0: OSPF: wrong area id                  0: OSPF: area mismatch               
   0: OSPF: wrong virtual link             0: OSPF: wrong authentication type   
   0: OSPF: wrong authentication key       0: OSPF: too packet small            
   0: OSPF: packet size > ip length        0: OSPF: transmit error              
   0: OSPF: interface down               135: OSPF: unknown neighbor            
5422: HELLO: netmask mismatch              0: HELLO: hello timer mismatch  
Root Cause

congiguration is wrong

Suggestions

Null

END