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Chapter 11: Rapid Spanning Tree Protocol (RSTP)
150 Section II: Menus Interface
There are two possible selections:
Point-to-point port
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 38 illustrates two AT-9000/24 Gigabit Ethernet switches that have
been connected with one data link. With the link operating in full-duplex,
the ports are point-to-point ports.
Figure 38. 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 39 illustrates an edge
port on an AT-9000/24 Gigabit 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.
Point-to-Point Ports
(Full-duplex Mode)
793
AT-9000/24
24 Port Gigabit Ethernet Switch
1
3
57
9111315
17 1921R
23R
2 4 6 8 1012 14 1618 2022R24R
POWER
21 22
23 24
SFP
LINK ACT
1000
10/100
PORT ACTIVITY
793
AT-9000/24
24 Port Gigabit Ethernet Switch
1
3
57
9111315
17 1921R
23R
2 4 6 8 1012 14 1618 2022R24R
POWER
21 22
23 24
SFP
LINK ACT
1000
10/100
PORT ACTIVITY