SMC Networks TigerSwitch 100 User Manual download pdf (Page 76)

ONFIGURING

THE

WITCH

2-46

STP Information

The Spanning Tree, STP Information page contains information on the

current status of the Spanning Tree.

Command Attributes

• Spanning Tree State — Indicates if the Spanning Tree Protocol is

currently enabled on the switch.

• Bridge ID — Identifies a unique identifier for the switch in the

Spanning Tree. The ID is calculated using the defined Spanning Tree

priority of the switch and its MAC address. The lower the Bridge ID,

the more likely the switch will act as the root.

• Max Age — The maximum time (in seconds) the switch 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. If the root port ages

out STP information (provided in the last configuration message), a

new root port is selected from among the device ports attached to the

network. (References to “ports” in this section means “interfaces,”

which includes both ports and trunks.)

• Hello Time — Specifies the time interval (in seconds) at which the

root device transmits a configuration message.

• Forward Delay — The maximum time (in seconds) the switch will

wait before changing states (i.e., discarding to learning to forwarding).

This delay is required because every device must receive information

about topology changes before it starts to forward frames. In addition,

each port needs time to listen for conflicting information that would

make it return to a discarding state; otherwise, temporary data loops

might result.

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SMC Networks TigerSwitch 100 User Manual Page 76