CFM Link Monitoring

To enable CFM to report link events, the link must first be registered with CFM. ERPS acts as a client of CFM and creates the required Management Entity Points (MEPs). For G.8032 v1/v2 implementation:

Creating a DOWN-MEP is by creating the DOWN-MEP with the CFM commands, and then assigning a group name to it. This group can then be associated to the ERPS ring.

Here is an example:

switch # sh  cfm   
Domain: "erps_6",  MD Level: 6     
   Association: "erps_MA_100", Destination MAC Type:  Multicast, VLAN "v2" with 2 cfm ports     
   Transmit Interval: 1000 ms       
     port 27; Down End Point, mepid: 11, transmit-interval: 10000 ms (configured),             
        MEP State: Enabled, CCM Message: Enabled,  Send SenderId TLV: Disabled       
     port 37; Down End Point, mepid: 21,
        transmit-interval: 10000 ms (configured), 
        MEP State: Enabled, CCM Message: Enabled, Send SenderId TLV: Disabled     
   Association: "erps_MA_100", Destination MAC Type: Multicast, VLAN "v2" with 2 cfm ports     
   Transmit Interval: 1000 ms       
Total Number of Domain             : 1   
Total Number of Association        : 2   
Total Number of Up MEP             : 0   
Total Number of Down MEP           : 2   
Total Number of MIP                : 0   
Total Number of Number of CFM port : 4   
Total Number of VPLS MIP(Static/Up): 0 / 0

switch # show cfm detail       
Domain/       Port     MP  Remote End-Point  Remote End-Point   MEP   Life       Flags    
Association                  MAC Address       IP Address       ID    time   Age   
======================================================================================   
erps_6           
  erps_MA_100  27      DE     00:04:96:34:e3:43  0.0.0.0        10    35000  4430   DM                   
               37      DE     00:04:96:27:fb:7b 0.0.0.0         20    35000  2790   DM    
======================================================================================   
Maintenance Point: (UE) Up End-Point, (DE) Down End-Point   
Flags: S - Static  Entry D - Dynamic Entry          
           CCM Destination MAC: (U) Unicast (M)  Multicast   
NOTE: The Domain and Association names are truncated to 13 characters, Lifetime and Age are in milliseconds.   
======================================================================================       
Total Number of Dynamic Up RMEP      : 0   
Total Number of Dynamic Down RMEP    : 2   
Total Number of Active Static RMEP   : 0   
Total Number of Inactive Static RMEP : 0

Note

You must configure a remote MEP-ID for the local MEPs so that a specific association can be maintained between the two ends.

Published March 1, 2020prev | next

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