This section provides procedures to configure and use Connectivity Fault Management (CFM) using Command Line Interface (CLI). The Shortest Path Bridging MAC (SPBM) network needs a mechanism to debug connectivity issues and to isolate faults. This is performed at Layer 2, not Layer 3. To support troubleshooting of the SPBM cloud, the switch supports a subset of CFM functionality.
Note
When you enable CFM in an SBPM network, as a best practice, enable CFM on the Backbone Edge Bridges (BEB) and on all Backbone Core Bridges (BCB). If you do not enable CFM on a particular node, you cannot obtain CFM debug information from that node.
You can configure CFM using one of two modes: simplified or explicit. Both modes are described in the following sections, but the simplified mode should be used.
Note
If you enable the cfm spbm enable command, you cannot assign a MEP/MIP level to an individual SPBM B-VLAN or configure CFM MD maintenance levels individually.
Regardless of whether you have chosen to configure individually or globally, there is one MEP per SPBM B-VLAN and one MIP level per SPBM B-VLAN.