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CrossFire 8600/8605 Token-Ring Switches v. 1.2, P/N: 710001641 Switch Configuration
STP Participation (TrCRF to ports)
Whether this TrCRF participates in the spanning tree protocol and, if so, the
protocol to be used. Possible values are
No
,
IEEE
and
Cisco
. The default is
No
.
The recommended protocol is IEEE, but if the TrCRF contains more than one port
and the port(s) are connected to SRT bridges running the IEEE Spanning Tree
Protocol (using the IEEE group address), then the Cisco protocol should be used.
•
If
STP Participation
is set to
No
, then all ports belonging to this TrCRF will
be set to forwarding mode. You can then override this by blocking a particular
port.
•
If
STP Participation
is set to
IEEE
or
Cisco
, then the selected protocol will
be used to determine the
forwarding
/
blocked
mode of the ports that are
configured with an STP mode of
auto
.
Switch Priority
Priority value for this switch (
0
through
65,535
). The lower the priority value, the
higher the priority. The bridge or switch with the lowest priority value in a spanning
tree becomes the root. The default is
32,768.
(To change individual port properties,
select
Port Spanning Tree Parameters...
).
Switch Hello Time (in Seconds)
Time the switch waits before sending the next configuration message when this
CRF is the root in STP. The default is
2
.
The minimum value is
1
. The maximum value is the lower of 10 or ((
Switch
Maximum Message Age
/ 2) – 1).
The valid range for this parameter is displayed when you select
Switch Hello Time
.
Switch Maximum Message Age (in Seconds)
Maximum message age used when this CRF is the root in STP. This parameter sets
the time at which the configuration message used by the spanning tree algorithm
should be discarded. The default is
20
. The minimum value is the higher of 6 or
((
Switch Hello Time
x 2) + 1).
The maximum cannot be more than the lower of 40 or ((
Switch Forward Delay
x
2) – 1).
The range limits that appear when you select this parameter are calculated using the
values currently selected for
Switch Hello Time
and
Switch Forward Delay
.
Switch Forward Delay (in Seconds)
The time the switch waits between transitions from listening to learning and from
learning to forwarding. The default is
15
. The minimum is the larger of 4 or
((
Switch Maximum Message Age
/
2) + 1). The maximum is
30
.