Redundancy
RM Web L3E
Release
6.0
07/2010
7.5
Spanning Tree
197
Parameter Meaning Possible Values Default
Setting
Frame „Instance
Parameters“
Detailed information on the selected
Multiple Spanning Tree Instance.
Priority The local bridge Priority for the
selected MST Instance. The bridge
priority and its own MAC address make
up this separate Bridge ID. The device
with the best (numerically lowest) priority
becomes the root device of the selected
MST region. Define the root device by
assigning to this device the best
(numerically lowest) priority in the
Bridge ID among all the devices in the
selected MST region.
Note that you may only enter multiples of
4,096 for these values.
0 ≤ n*4096 ≤
61440
32,768
Bridge ID The local Bridge ID, made up of the
local priority + MSTI, following by its
own MAC address.
The format is
ppppp / mm mm mm mm mm mm,
with: ppppp: priority+MSTI (decimal) and
mm: the respective byte of the MAC
address (hexadecimal).
0 - 65,534; sum of
priority (0 - 61,440 in
steps of 4,096) and
MSTI (1 - 4,094)
32,768 +
MSTI
Time since last
change
Time since the last topology change for
this MST Instance.
Topology changes Counts how often the device has put a
port into the Forwarding status via
Spanning Tree since the selected MST
Instance was started.
Root ID The Bridge ID of the current root
bridge of the selected MST region.
The format is
ppppp / mm mm mm mm mm mm,
with: ppppp: priority (decimal) and
mm: the respective byte of the MAC
address (hexadecimal).
0 - 65,534; sum of
priority (0 - 61,440 in
steps of 4,096) and
MSTI (1 - 4,094)
Root path costs Path costs from the root port to the
current root bridge of the selected MST
region. 0: bridge is root for this MST
region.
0-200,000,000
Root Port The port of the device from which the
current path leads to the root bridge of
the selected MST region. 0: bridge is
root for this MST region.
Valid port ID or 0
Table 89: Multiple Spanning Tree settings, MST Instance, parameters
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