Huawei Quidway S1700 Series Web User Manual page 58

Quidway S1700 Series Ethernet Switches
Web User Manual
Figure 7-3 Displaying Global Settings for STP
Table 7-2 More Parameters of Global Settings for STP
Title
Bridge ID
Designated Root
Root Port
Root Path Cost
Topology
changes
Last
Change
Hello Time
Max Age
Issue 01 (2011-11-17)
Description
A unique identifier for this bridge, consisting of the bridge priority, and
MAC address (where the address is taken from the switch system).
The priority and MAC address of the device in the Spanning Tree that
this switch has accepted as the root device.
The number of the port on this switch that is closest to the root. This
switch communicates with the root device through this port. If there is
no root port, then this switch has been accepted as the root device of the
Spanning Tree network.
The path cost from the root port on this switch to the root device.
The number of times the Spanning Tree has been reconfigured.
Topology Time since the Spanning Tree was last reconfigured.
Interval (in seconds) at which the root device transmits a configuration
message.
Default: 2
Minimum: 1
Maximum: The lower of 10 or [(Max. Message Age / 2) -1]
The maximum time (in seconds) a device can wait without receiving a
configuration message before attempting to reconfigure. All device
ports (except for designated ports) should receive configuration
messages at regular intervals. Any port that ages out STP information
(provided in the last configuration message) becomes the designated
port for the attached LAN. If it is a root port, a new root port is selected
from among the device ports attached to the network.
Default: 20
Minimum: The higher of 6 or [2 x (Hello Time + 1)]
Maximum: The lower of 40 or [2 x (Forward Delay - 1)]
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7 Spanning Tree Algorithm
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