Madge Networks Token Ring Switch Combining CRF and BRF functions, CRF

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Smart DeskStream Technical Presentation 52
nCRF is operational on all ports in stack by default
nCRF will attempt to learn ring number
nthe CRF ring number can be manually configured
Source Route Switching
Combining CRF and BRF functions
CRF
BRF
nBRF will only function on master DeskStream
nonly ports on master DeskStream are supported on BRF
nEach port can be designated as a BRF port, including option
module ports
nEach BRF port has its own ring number
nBRF ports can auto-detect ring number
nInternal “virtual” port links between the CRF and BRF
Summary
CRF will attempt to learn the ring number from the RIF in passing
frames as will the BRF.