WSG18SFP Switch User Manual
WSG18SFP Switch User Manual
Page 22 of 27
RSTP VLAN Bridge Overview
Bridge ID: Show the switch’s current bridge priority setting and bridge ID which stands for the MAC
address of the switch
Hello Time: Interval (in seconds) with which the root device transmits configuration message
Max Age: The max. time (in seconds) a device waits without receiving configuration message before
attempting to reconfigure. All device ports (except for designated ports) should receive configuration
messages with 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 the device ports attached to the network.
Fwd Delay: The max. time (in seconds) the root device waits before changing state (i.e. discarding to
learning to forwarding). This delay is required because every device should receive information about
topology changes before it starts to forward frames. In addition, each port needs time to listen to conflicting
information that makes it return to a discarding state; otherwise, temporary data loops can occur.
Topology: Indicates if spanning tree topology is steady or undergoing reconfiguration. (The time required
for reconfiguration is extremely short, so no values other than “steady” state are likely to be seen in this
field)
Root ID: The priority and MAC address of the device in the Spanning Tree that the switch has accepted as
the root device. Each port has been connected to the root device.
RSTP Port Status
Port/Group: The number of a port or the ID of a static trunk.
Path Cost: The cost for a packet to travel from this port to the root in the current Spanning Tree
configuration. The slower is the media, the higher is the cost.
