EverFocus ES0802-41 User Manual page 32

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.
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.)
Root ID : The priority and MAC address of the device in the Spanning Tree that

this switch has accepted as the root device, and the port 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 the media, the higher the cost.
 Edge Port: Shows if this port is functioning as an edge port, either through
 manual selection (see the RSTP Port Configuration table) or auto-detection. Note
that if the switch detects another bridge connected to this port, the manual
setting for Edge Port will be overridden, and the port will instead function as a
point-to-point connection.
 P2P Port: Shows if this port is functioning as a Point-to-Point connection to
exactly one other bridge. The switch can automatically determine if the interface
is attached to a point-to-point link or to shared media. If shared media is detected,
the switch will assume that it is connected to two or more bridges.
 Protocol: Shows the spanning tree protocol functioning on this port, either RSTP
or STP (that is, STP-compatible mode).
Figure 2-4-2
27
PoE Switch