Madge Networks Token Ring Switch - Manual (Page 47)

47
Smart DeskStream Technical Presentation 47
BRF Port Interface (SRB)
‘Virtual’ port
n What is the Bridge Relay Function?
Source Route Switching
Bridging using BRF
Port 17
(ring 107)
Port 20
(ring 108)
Port 23
(ring 109)
DeskStream ports
CRF Port Interface (Local)
The CRF manages switched communication between its ports.
The BRF is only available on the Master DeskStream - the bottom
one in a stack - and manages switched communications for the BRF
ports.
By default all ports in a DeskStream stack are in the CRF, but we can
enable the BRF interface on any or all of the Master DeskStream
ports including the uplink modules.
Communication between the CRF interface - known as the Local
Interface - and the BRF interface - known as the Source Route
Bridging (SRB) Interface - is via the ‘virtual’ port.