Description: This time value is measured in units of hundredths of a second. It is used for two purposes. Firstly, it controls how fast a port changes its spanning state when moving towards the Forwarding state. In this case, the value determines how long the port stays in a particular state before moving to the next state. For example, how long a port stays in the Listening state when moving from Blocking to Learning. Secondly, when a topology change has been detected and is underway, this time value is used to age all dynamic entries in the Forwarding Database. This is the actual value that this bridge is currently using.