Allied Telesis AT-S105 - Manual (Page 150)

Chapter 13: Spanning Tree and Rapid Spanning Tree Protocols
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selected as the root bridge of a spanning tree domain, it transmits a BPDU
every two seconds.
Point-to-Point
and Edge Ports
This section applies only to RSTP. Part of the task of configuring RSTP is
defining the port types on the bridge, which is directly related to the
device(s) connected to the port. With the port types defined, RSTP can
reconfigure a network much quicker than STP when a change in network
topology is detected.
There are two possible selections:
ˆ Point-to-point port
ˆ Edge port
If a bridge port is connected to another bridge or router port, it normally
operates in full-duplex mode and is functioning as a point-to-point port.
Figure 45 illustrates two switches that are connected with one data link.
This link is operating between two point-to-point ports.
Figure 45. Point-to-Point Ports
Point-to-Point Ports