Cisco SGE2000 - - Gigabit Switch Administration Manual page 266

Configuring Spanning Tree
Defining Spanning Tree
Cisco Small Business SFE/SGE Managed Switches Administration Guide
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Auto
— Enables Port Fast mode a few seconds after the interface
becomes active.
•
Enable Root Guard — Enable the prevention of a devices outside the network
core from being assigned the spanning tree root. The possible field values are:
-
Checked
— Enables Root Guard on the selected port or LAG.
-
Unchecked
the default value.
•
Enable BPDU Guard — Protects the network from invalid configurations. The
possible field values are:
-
Checked
— Enables BPDU Guard on the selected port or LAG.
-
Unchecked
the default value.
•
Port State — Displays the current STP state of a port. If enabled, the port state
determines what forwarding action is taken on traffic. Possible port states are:
-
Disabled
— Indicates that STP is currently disabled on the port. The port
forwards traffic while learning MAC addresses.
-
Blocking — Indicates that the port is currently blocked and cannot
forward traffic or learn MAC addresses.
-
Listening
— Indicates that the port is in Listening mode. The port cannot
forward traffic nor can it learn MAC addresses.
-
Learning
— Indicates that the port is in Learning mode. The port cannot
forward traffic, however it can learn new MAC addresses.
-
Forwarding
can forward traffic and learn new MAC addresses.
•
Speed — Indicates the speed at which the port is operating.
•
Path Cost — Defines the port contribution to the root path cost. The path cost
is adjusted to a higher or lower value, and is used to forward traffic when a path
being rerouted.
•
Default Path Cost — Defines the default path cost as the Path Cost field
setting. The possible field values are:
-
Checked
— Path Cost is the default value.
-
Unchecked
— Disables Root Guard on the selected port or LAG. This is
— Disables BPDU Guard on the selected port or LAG. This is
— Indicates that the port is in Forwarding mode. The port
— Path Cost is user-defined.
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