Planet SGSD-1022 User Manual page 158

Max Age
Hello Time
Forward Delay
Designated Root
Configuration
Changes
Last Topology Change
The current root port and current root cost display as zero when this device is not connected
to the network.
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 ages 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. (References to "ports" in this section mean "interfaces,"
which includes both ports and trunks.)
The time interval (in seconds) at which the root device transmits a configuration
message.
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.
The priority and MAC address of the device in the Spanning Tree that this
Managed Switch has accepted as the root device.
- Root Port The number of the port on this Managed Switch that is closest
to the root. This Managed Switch communicates with the root
device through this port. If there is no root port, then this
Managed Switch has been accepted as the root device of the
Spanning Tree network.
- Root Path The path cost from the root port on this switch to the root
Cost device.
The number of times the Spanning Tree has been reconfigured.
Time since the Spanning Tree was last reconfigured.
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User's Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P