Allied Telesis AT-S81 - Manual (Page 158)

Chapter 12: Rapid Spanning Tree Protocol (RSTP)
158 Section II: Menus Interface
There are two possible selections:
ˆ Point-to-point port
ˆ Edge port
The default setting for the RSTP port point-to-point status is automatic.
With the automatic setting, the point-to-point status is True of the port is
operating in full-duplex mode. If the port is operating in half-duplex mode,
then the point-to-point status is False.
Figure 39 illustrates two AT-8000/8POE Fast Ethernet switch that have
been connected with one data link. With the link operating in full-duplex,
the ports are point-to-point ports.
Figure 39. Point-to-Point Ports
If a port is operating in half-duplex mode and is not connected to any
further bridges participating in STP or RSTP, then you need to manually
define the port as an edge port. The default setting for the edge port status
is False. You must manually configure this setting for each port. There is
no automatic mode for the edge port setting. Figure 40 illustrates an edge
port on an AT-8000/8POE Fast Ethernet 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.
AT-8000/8POE
8 Port POE Fast Ethernet Switch
PoE
9 9R
1 3 5 7
2 4 6 8
TERMINAL POR
T 1 3 5 7
2 4 6 8
9
9R POWER
10/100/1000 Base-T
SFP
UPLINK PORT
RS-232
DET ON ON
100 LINK ACT 10 LINK ACT
PD ON MAX CURRENT PD ERR
10/100 LINK
1000 LINK ACT
ACT CLASS 1 LASER PRODUCT
MAIN PORT ACTIVITY
UPLINK PORT ACTIVITY
820
Point-to-Point Ports
(Full-duplex Mode)
AT-8000/8POE
8 Port POE Fast Ethernet Switch
PoE
9 9R
1 3 5 7
2 4 6 8
TERMINAL POR
T 1 3 5 7
2 4 6 8
9
9R POWER
10/100/1000 Base-T
SFP
UPLINK PORT
RS-232
DET ON ON
100 LINK ACT 10 LINK ACT
PD ON MAX CURRENT PD ERR
10/100 LINK
1000 LINK ACT
ACT CLASS 1 LASER PRODUCT
MAIN PORT ACTIVITY
UPLINK PORT ACTIVITY
820