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4 Configuration
STP Traps
STP New Root Trap
STP Topology Change
Traps
Root Bridge Information
Root Bridge
Root Cost
Root Maximum Age
Root Forward Delay
Root Port
Click Apply to make the configurations take effect.
L2 Features > Spanning Tree > STP Port Settings
STP can be set up per port. In addition to setting Spanning Tree parameters for use on the switch level, the
Switch allows configuration of a spanning tree setup for a group of ports. Each port group spanning tree will
require separate configuration.
An STP Group spanning tree works in the same way as the switch-level spanning tree, but the root bridge
concept is replaced with a root port concept. The root port is selected based on the priority of and path cost
to the port. Redundant links will be blocked, just as redundant links are blocked on the switch level.
The STP on the switch level blocks redundant links between switches (and similar network devices). The
port level STP will block redundant links within an STP Group
The fields that can be configured are described below:
Item
From Port / To Port
Port Fast
and STP.
Select to enable or disable the STP new root trap option.
Select to enable or disable the STP topology change trap
option.
Display the root bridge information.
Display the root cost information.
Display the root maximum age in seconds.
Display the root forward delay in seconds.
Display the root port.
Table 4.22
Figure 4.39 – L2 Features > Spanning Tree > STP Port Settings
Description
Select the range of ports to be included in the spanning tree port
group.
Select the Port Fast option here. Options to choose from are
Network, Disabled, and Edge.
In the Network mode the port will remain in the non-port-fast
state for three seconds. The port will change to the port-fast
state if no BPDU is received and changes to the forwarding
state. If the port received the BPDU later, it will change to
the non-port-fast state.
In the Disable mode, the port will always be in the non-port-
fast state. It will always wait for the forward-time delay to
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