ERPS Feature Limitations
  
  
    The following are ERPS feature
      limitations:
    
      - Backup failover and checkpointing for both v1 and v2 are not available
        in the current release.
 
      - In platforms that do not have hardware OAM (operations and
        management), the optimum CFM interval recommended is one second for link monitoring, which
        will give rise to approximately three-second overhead in convergence times.

Note   
For optimum
          performance and convergence, it is recommended to use fiber cables.
 
 
      - Other than the basic EAPS
        interoperability stated above, all other EAPS related interoperability is not
        supported.
 
      - There is no interoperability with STP in
        the current release.