Displaying Spanning Tree Information for a VSD

Use the Spanning Tree by VSDs window to view bridging  information for a VLAN Secure Domain. 

Field Descriptions

VSD Bridge Parameters
My ID Identifier used in a spanning tree network to uniquely identify each bridge on the network.
Root Root Bridge: The bridge with the highest priority bridge ID that is selected as the root of the spanning tree.  In an extended local area network (LAN), the root bridge controls the spanning tree configuration by originating Hello Messages.  The root bridge is responsible for keeping the spanning tree intact.
VSD Name   Name assigned to the VSD. 
Root Cost   Cost of the path to the root from the bridge that is transmitting the Hello Messages.
Forward Delay  Number of seconds a bridge waits before allowing disabled bridge ports to transition to the forwarding state. The value can be from 4 through 30 seconds. The default is 15 seconds.
Topology Changes  Number of network topology changes detected since the last Hello Message was transmitted by the bridge. 
Hello Time Frequency with which the bridge port transmits Hello Messages to check for changes in network topology. The value can be from 1to 10 seconds.  The default is 2 seconds.  The greater the frequency ( the lower the number of seconds), the sooner changes in topology are detected. The lower the frequency (the greater the number of seconds), the lower the overhead associated with detecting changes.
Max Age Maximum amount of time a bridge port waits to receive a Hello Message before the bridge recalculates the root, path cost, and root port. The value can be from 6 to 40. The default is 20.

 

Per Port Parameters
Port # Port's assigned number.
Interface Type of interface associated with the port.
Address Bridge's MAC address.
Des. Root Designated root, the bridge ID of the rest of the spanning tree as determined by the STP as executed by this bridge.
Des. Bridge Bridge ID of the bridge this port considers to be the designated bridge for this port's segment.
State Operational state of the port (up, down, forwarding).
Manual State of bridge learning (enabled or disabled).  If manual mode is enabled, the port's forwarding table that contains learned addressess is purged, and new addresses are not learned. However, you can still configure MAC address filters manually. See Configuring Permanent Address Filters for more informaiton.
Des. Cost Path cost.  Path cost can range from 1 to 65535, with higher values indicating higher costs.
Prio-Des. Port ID of the port on the designated bridge for this port's segment.