SMC Networks 7500A/VCP - annexe 1, Руководство по управлению

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S
PANNING
T
REE
P
ROTOCOL
C
ONFIGURATION
2-37
Spanning Tree Protocol Configuration
The Spanning Tree Algorithm (STA) detects and disable network loops
and provides backup links between switches, bridges, and routers to ensure
that only one route exists between any two stations on the network. The
backup links automatically take over when a primary link goes down.
Managing Global Settings
Global setting apply to the entire switch.
Fields and Attributes
The following global attributes are read-only and cannot be changed:
• Bridge ID – The priority and MAC address of this device.
• Designated Root – The priority and MAC address of the device in the
Spanning Tree that this switch has accepted as the root device.
• Root Port – 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.
• Root Path Cost – The path cost from the root port on this switch to
the root device.
• Configuration Changes – The number of times the Spanning Tree
has been reconfigured.
• Last Topology Change – The time since the Spanning Tree was last
reconfigured.
• Hold Time – The minimum interval between the transmission of
consecutive Configuration BPDUs. (CLI only.)
The following global attributes can be configured:
• Spanning Tree State – Enable/disable this switch to participate in an
STA-compliant network.