Allied Telesis AT-S39 - Manual (Page 103)

AT-S39 User’s Guide
103
If a port is operating in half-duplex mode and is not connected to any
further bridges participating in STP or RSTP, then the port is an edge
port. Figure 25 illustrates an edge port on an AT-8024 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.
Figure 25 Edge Port
A port can be both point-to-point and edge at the same time. It would
operate in full-duplex and have no STP or RSTP devices connected to it.
Figure 26 illustrates a port functioning both as point-to-point and edge.
Figure 26 Point-to-Point and Edge Point
Determining whether a bridge port is point-to-point, edge, or both, can
be a bit confusing. For that reason it might be best not to change the
default values for this RSTP feature unless in have a good grasp of the
concept. In most cases, the default values will work fine.
Link
Mode
Link
Mode
100
FULL
ACT
MODE
COL FAULT
MASTER
PWR
AT-8024
10Base-T / 100Base-TX Fast Ethernet Switch RS-232 TERMINAL PORT
Edge Port
5 4 3 2 1
6 7 8
Link
Mode
Link
Mode
100
FULL
ACT
MODE
COL
FAULT
MASTER
PWR
AT-8024
10Base-T / 100Base-TX Fast Ethernet Switch RS-232 TERMINAL PORT
Point-to-Point and Edge Port
Workstation
(Full-duplex Mode)