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RSTP Status
RSTP VLAN Bridge Overview
Figure 3-4
¾ Hello Time: Interval (in seconds) at which the root device transmits a
configuration message.
¾ Max Age: The maximum time (in seconds) a device can wait without
receiving a configuration message before attempting to reconfigure. All
device ports (except for designated ports) should receive configuration
messages at regular intervals. Any port that age out STA information
(provided in the last configuration message) becomes the designated port
for the attached LAN. If it is a root port, a new root port is selected from
among the device ports attached to the network.
¾ Fwd Delay: The maximum time (in seconds) the root device will wait before
changing states (i.e., discarding to learning to forwarding). This delay is
required because every device must receive information about topology
changes before it starts to forward frames. In addition, each port needs time
to listen for conflicting information that would make it return to a discarding
state; otherwise, temporary data loops might result.
¾ Topology: Indicates if spanning tree topology is steady or undergoing
reconfiguration. (The time required for reconfiguration is extremely short, so
no values other that “steady” state are likely to be seen in this field.)