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GS700TR Smart Switch Software Administration Manual
Configuring Switching Information 3-21
v1.0, May, 2008
2. Click Refresh to update the information on the screen with the most current data.
3. Click Cancel to cancel the configuration on the screen and reset the data on the screen to the
latest value of the switch
4. If you make any configuration changes, click Apply to send the updated configuration to the
switch. Configuration changes take place immediately.
CST Configuration
Use the Spanning Tree CST Configuration page to configure Common Spanning Tree (CST) and
Internal Spanning Tree on the switch.
To display the Spanning Tree CST Configuration page:
1. Click Switching > STP > Advanced > CST Configuration in the navigation tree.
BPDU Flooding Enables or disables BPDU Flooding. When this feature is enabled,
BPDU packets arriving at this port are flooded to other ports if STP is
disabled.
Bridge Identifier The bridge identifier for the CST. It is made up using the bridge priority
and the base MAC address of the bridge.
Time Since Topology
Change
The time in seconds since the topology of the CST last changed.
Topology Change Count The number of times the topology has changed for the CST.
Topology Change 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.
Designated Root The bridge identifier of the root bridge. Is made up from the bridge
priority and the base MAC address of the bridge.
Root PathCost Path Cost to the Designated Root for the CST.
Root Port Port to access the Designated Root for the CST.
Max Age (secs) Path Cost to the Designated Root for the CST.
Forward Delay (secs) Derived value of the Root Port Bridge Forward Delay parameter.
Hold TIme (secs) Minimum time between transmission of Configuration BPDUs.
CST Regional Root Priority and base MAC address of the CST Regional Root.
CST Path Cost Path Cost to the CST tree Regional Root.
Table 3-13. Spanning Tree Switch Configuration/Status Fields (continued)
Field Description