CFM will allow layer 2 health checking between two end-points, but will not allow you to bind a port status to it like ELSM will do. However, if you are running ERPS between the Summit and the ISW CFM can be configured to work with ERPS for monitoring link state.
Thanks fro your prompt response. Actually, customer is asking for UDLD, so we proposed to implement ELSM. As per my understanding, ELSM is equivalent to UDLD, so we are looking to implement ELSM.
How CFM will meet ELSM functionality completely? Is there any difference/limitation between CFM and ELSM?