Filter
Top Products
Spanning Tree Information Screen Items
4-27
CONFIGURATION AND MANAGEMENT
Parameter Description
Hello Time Displays the rate (in seconds) at which hello frames are
generated.
Forward Delay The amount of time (in seconds) any port in the Spanning
Tree will wait before changing states (i.e., listening to
learning, etc.).
Root Port The port on the switch that communicates with the root
device of the Spanning Tree. If the switch is the root device,
then “No_Port” will appear in this field.
Topology Change The number of times a port has entered the forwarding state
Count plus the number of times a port has changed from
forwarding to blocking.
Time Since Last The time since a port has entered the forwarding state or
Topolgy Change changed from forwarding to blocking.
Max Message Age The maximum time (in seconds) a device in the Spanning
Tree can wait for a message before reconfiguring.
Root MAC address of the root device in the Spanning Tree.
Root Cost The path cost from the switch’s root port to the root device.
State The current state of the port within the Spanning Tree:
Disabled - Port has been disabled or failed diagnostics.
Blocked - Port receives STP configuration messages,
but does not forward packets.
Listening - Port leaves Blocking state, transmits configur-
ation messages, but does not yet forward packets.
Learning - Port has transmitted configuration messages,
address table cleared, port begins learning addresses.
Forwarding - Port forwards packets and learns addresses.
Designated Cost The cost for a packet to go from this port to the root. The
slower the media, the higher the cost.
Designated Bridge The priority and MAC address of the device through which
ID this port must communicate to reach the root.
Designated Port The port on the designated bridge through which the
switch
must communicate to reach the root.