EKI-9500 Series User Manual
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4.4.19.4
CST
Use the Spanning Tree CST Configuration page to configure the Common Spanning
Tree (CST) settings. The settings and information on this page define the device
within the spanning tree topology that connects all STP/RSTP bridges and MSTP
regions.
To access this page, click
Switching
>
Spanning Tree
>
CST
.
Figure 4.249 Switching > Spanning Tree > CST
The following table describes the items in the previous figure.
Description
A user-configured description of the port.
Refresh
Click
Refresh
to update the screen.
Edit
Click
Edit
to edit the selected entries.
Details
Click
Details
to open a window and display additional information for
the selected interface.
Item
Description
Item
Description
Bridge Priority
The value that helps determine which bridge in the spanning tree is
elected as the root bridge during STP convergence. A lower value
increases the probability that the bridge becomes the root bridge.
Bridge Max Age
The amount of time a bridge waits before implementing a topological
change.
Bridge Hello Time
The amount of time the root bridge waits between sending hello
BPDUs.
Bridge Forward
Delay
The amount of time a bridge remains in a listening and learning state
before forwarding packets.
Spanning Tree Maxi-
mum Hops
The maximum number of hops a Bridge Protocol Data Unit (BPDU) is
allowed to traverse within the spanning tree region before it is dis-
carded.
BPDU Guard
When enabled, BPDU Guard can disable edge ports that receive
BPDU packets. This prevents a new device from entering the existing
STP topology. Thus devices that were originally not a part of STP are
not allowed to influence the STP topology.
