Figure 27. Primary And Traced Dsrr Port - Cabletron Systems SmartStack STS16-20R Installation And User Manual

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•
The traced port and the backup for the traced port must connect to the same
legacy or emulated Token-Ring.
•
The ports belonging to a DSRR group must be connected to the same rings as
the corresponding ports of a DSRR group with the same Group ID on another
switch.
•
The CRFs containing the primary and traced ports of a DSRR group must not
contain other ports.
•
A backup BRF can only forward traffic for one failed BRF at a time.
•
If a BRF, for which a DSRR group is created, has more than two CRFs, the
primary and the traced ports must be in the same box.

Figure 27. Primary and Traced DSRR Port

SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide
BRF
Bridge No. B1
Backup BRF
Inactive
Backup for primary port
Primary port
A
A
T
T
M
M
Traced port
Backup for traced port
Switch Configuration