Before going into either performance or fault management for Frame Relay, you need to be able to associate the physical interface, sub-interface, and PVC. This section discusses steps for finding out whether Frame Relay is set up on a serial port. The process discussed should reveal the following information for a Cisco router:
Number of interfaces
Types of interfaces
Whether Frame Relay is configured
Sub-interface and DLCI numbers using the cfrExtCircuitTable
Statistics from the frCircuitTable (RFC 1315)
The variables used to gather this data are not covered in detail here, but are shown as examples of what you would need to gather to effectively map the router interfaces to the appropriate DLCIs. (The ifTable ...