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The K2_M Alarm Occurs When the OptiX 155622H(Metro1000) V3 Is Interconnected to the Equipment of Vendor A Through the 1+1 Linear MSP

Publication Date:  2012-07-24 Views:  46 Downloads:  0
Issue Description
The network consisting of the OptiX 155/622H(Metro1000) V3 was interconnected to the transport product of vendor A through the 1+1 linear MSP. The K2_M alarm was generated. The customer reflected that the switching was not affected and requested for the explanation for the alarm generation.
The attribute of Huawei linear MSP is 1+1 single-ended revertive mode. The vendor A also used the same attribute for the configuration.
            
Alarm Information
alm-get-curdata:0,ALL;
CUR-ALM                                 
 NUM     BID  EID          SEVERITY  STATE    START-TIME      END-TIME   
PARA1 PARA2 PARA3 PARA4 PARA5
142645   11  K2_M         MN     start    2007-6-28 12:3:53  None     
0x04  0x01  0xff  0xff  0xff        
Handling Process
1. The method of clearing K2_M alarm: Do not monitor K2_M. This alarm does not affect the services.
2. After the check again, confirm that the configuration of Vendor A is 1:1. After the correction, the alarm is cleared.       
Root Cause
Through the returned k bytes, analyze the event:
........... 
1   8091   K_RECEIVED     0x0008   2007-6-28 12:3:52  0x01fd7f3a 
1   8092   K_DIR       0x0000   2007-6-28 12:3:52  0x01fd8008 
.........
The K byte received in the M1000V3 NE standby path is 0x0008. It indicates that the protection mode of the opposite linear MSP is 1:N. In the M1000V3, the configured linear MSP is 1+1. Hence, it reports the K2_M alarm.
For the linear MS, the bit5 of K2 byte is 1. It indicates the 1:N linear MSP.       
Suggestions
None      

END