Cabletron Systems STS16-20R - Manual (Page 156)

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