SMC Networks 10/100/1000 SMCGS8P-Smart , S, 2-54

C ONFIGURING THE S WITCH
2-54
•Designated Root — Identifies the priority and MAC address of
the device in the Spanning Tree that the switch has accepted as
the root device.
-Root Port — Specifies the port number on the switch that is
closest to the root. The switch communicates with the root
device through this port. If there is no root port, the switch
has been accepted as the root device of the Spanning Tree
network.
-Root Path Cost — Identifies the path cost from the root port
on the switch to the root device.
• Root Hello Time* – Interval (in seconds) at which this
device transmits a configuration message.
• Root Maximum Age* – The maximum time (in seconds)
this 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. If the root port ages out STA
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.)
• Root Forward Delay* – The maximum time (in seconds)
this device 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.
b_mgmt.book Page 54 Tuesday, July 8, 2003 5:24 PM