Cst Configuration - NETGEAR XS728T ProSAFE Software Administration Manual

The following table describes the STP Status information displayed on the screen.
Field
Bridge Identifier
Time Since Topology Change The time in seconds since the topology of the CST last changed.
Topology Change Count
Topology Change
Designated Root
Root Path Cost
Root Port
Max Age (sec)
Forward Delay (sec)
Hold Time (sec)
CST Regional Root
CST Path Cost

CST Configuration

To configure Common Spanning Tree (CST) and Internal Spanning Tree on the switch, use
the CST Configuration screen.
To configure CST settings:

1. Select Switching > STP > Advanced > CST Configuration.
2. Specify values for CST in the following fields:
• Bridge Priority. Specify the bridge priority value for the Common and Internal
Spanning Tree (CST). When switches or bridges are running STP, each is assigned a
priority. After exchanging BPDUs, the switch with the lowest priority value becomes
the root bridge. The bridge priority is a multiple of 4096.
• Bridge Max Age (Sec). Specify the bridge maximum age time for the Common and
Internal Spanning Tree (CST), which indicates the amount of time in seconds a bridge
waits before implementing a topological change. The value must be less than or
equal to (2 * bridge forward delay) – 1 and greater than or equal to 2 * (bridge hello
time +1). The valid range is 6–40, and the default value is 20.
XS728T ProSAFE 28-Port 10-Gigabit L2+ Smart Switch
Description
The bridge identifier for the CST. It is made up using the bridge priority and
the base MAC address of the bridge.
The number of times the topology has changed for the CST.
The value of the topology change parameter for the switch indicating if a
topology change is in progress on any port assigned to the CST. The value is
either True or False.
The bridge identifier of the root bridge. It is made up from the bridge priority
and the base MAC address of the bridge.
Path cost to the designated root for the CST.
Port to access the Designated Root for the CST.
Specifies the bridge maximum age for CST. The value must be less than or
equal to (2 X bridge forward delay) – 1 and greater than or equal to 2 X
(bridge hello time +1).
Derived value of the root port bridge forward delay parameter.
Minimum time between transmission of configuration BPDUs.
Priority and base MAC address of the CST regional root.
Path cost to the CST tree regional root.
Switching
61