Allied Telesis AT-S86 - Manual (Page 99)

AT-S86 Management Software User’s Guide
99
Point-to-Point and Edge Ports
Note
This section applies only to RSTP.
Part of the task of configuring RSTP is defining the port types on the
bridge. This relates 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 operating in full-duplex mode, than the port is functioning
as a point-to-point port. Figure 29 illustrates two AT-FS750/48 Fast
Ethernet Smart Switches that have been connected with one data link.
With the link operating in full-duplex, the ports are point-to-point ports.
Figure 29. Point-to-Point Ports
If a port is not connected to any further bridges participating in STP or
RSTP, then the port is an edge port. Figure 30 illustrates an edge port on
an AT-FS750/48 Fast Ethernet Smart Switch. The port is connected to an
Ethernet hub, which in turn is connected to a series of Ethernet
workstations. This is an edge port because it is connected to a device
operating at half-duplex mode and there are no participating STP or RSTP
devices connected to it.
1025
1025
Point-to-Point Ports
(Full-duplex Mode)