Cisco Pseudo Wire Frame Relay MIB This MIB describes network management objects defined for FRoPW services over a Packet Switched Network (PSN). As described in the IETF Frame Relay over Pseudowire (FRoPW) draft, draft-ietf-pwe3-frame-relay-01.txt, FR VCs and PW can be mapped in 2 modes: One-to-one mapping mode: a FR VC is mapped to a PW. This mode is described by cpwVcFrTable. Many-to-one mapping mode (a.k.a. port mode): multiple FR VCs assigned to a port are mapped to a PW. This mode is addressed by cpwVcFrPortModeTable. In this mode, all data frames are directed to the associated PSN tunnel regardless of DLCI.