GE T1000 Technical Manual page 167

Chapter 7 – Configuration
REASON SWITCHES-TM-EN-3
 Restricted: enables Root guard functions. If it is desired to
control ports to not propagate topology changes or not to
be root ports, to guarantee that that ports are not in the
main catenet of the logical topology, Root guard functions
should be enabled. Possible values are as follows:

Restricted Role: enable Root guard function. This
checkbox allows the port to guarantee that the
port will not be a Root port, even if it is the best
path to the root. Checkbox selected means that
the port will not operate root port, and checkbox
empty means port could be selected as root port;

Restricted TCN: enable the port to not
propagate notifications and topology changes
received in that port to other ports. This can be
used to ports connected to networks that
change frequently. Checkbox selected means
that the port will not propagate topology change
and notification messages, and checkbox empty
means port will propagate these messages;
 BPDU Guard: enable the port to operate in BPDU Guard
mode. This function causes the port to disable itself if a
BPDU message is received in that port, as could happen if
a non-STP bridge is looped in the Spanning Tree network.
Ports operating as Edge ports are not affected by this
setting. Checkbox selected means that the port will
disable itself if a BPDU packet is received, and checkbox
empty means port will not disable itself in that case;
 Point-to-point: indicates if port is connected to a
switched full-duplex LAN (point-to-point LAN) or a shared
medium LAN. Allowed values are Auto, Forced True and
Forced False. Auto selection means that switch will detect
automatically if full-duplex operation is allowed or not,
forced true means port will always operate as Point-to-
point connection and forced false means port will always
be considered as a shared medium. Point-to-point
connections have a transition to forward state faster than
shared medium LAN connection.
CIST Normal Port Configuration
o
Port: shows the aggregated ports to be configured at this

row;
STP Enabled: enable STP function at the port. Checkbox

selected means STP enabled, and checkbox empty means
disabled;
GE Reason Switches
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