74 Chapter 4 Using VLAN Manager208963-BRootThe read-only Root table displays information about the device acting as rootwithin a selected STG.To view the root table:The Root table opens in the contents pane (Figure 27).Table 22 Status table fieldsField DescriptionDevice IP address of the bridge.NumPorts Number of ports controlled by this bridging entity.ProtocolSpecification An indication of which version of the Spanning TreeProtocol (STP) is operating. The IEEE 802.1dimplementations display ieee8021d.TimeSinceTopologyChange Time in hundredths of a second since the last time atopology change was detected by the bridge entity or STG.TopChanges The number of topology changes detected by this bridgesince the management entity was last reset or initialized.MaxAge Maximum age of STP information learned from the networkon any port before it is discarded, in units of hundredths ofa second. This is the actual value that the bridge iscurrently using. The default value is 2000 (20 seconds).HelloTime Amount of time in hundredths of a second betweentransmission of configuration bridge protocol data units(BPDUs) by this device on any port when it is the root ofthe spanning tree. The default value is 200 (2 seconds).HoldTime Time interval in hundredths of a second during which nomore than two configuration BPDUs are transmitted by thisdevice. The default value is 100 (1 second).ForwardDelay Time interval in hundredths of a second that controls howfast a port changes its spanning state when moving towardthe Forwarding state. This value determines how long theport stays in each of the Listening and Learning states,which precede the Forwarding state. This value is alsoused when a topology change is detected and is underway, to age all dynamic entries in the ForwardingDatabase. The default value is 1500 (15 seconds).In the navigation pane, select Root.
