Allied Telesis AT-S62 - Manual (Page 337)

AT-S62 User’s Guide
Section IV: Spanning Tree Protocols 337
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 98 illustrates an edge port on an AT-8524M 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 98 Edge Port
A port can be both a point-to-point and an edge port at the same time. It
operates in full-duplex and has no STP or RSTP devices connected to it.
Figure 99 illustrates a port functioning as both a point-to-point and edge
port.
Figure 99 Point-to-Point and Edge Port
Determining whether a bridge port is point-to-point, edge, or both, can
be a bit confusing. For that reason, do not change the default values for
this RSTP feature unless you have a good grasp of the concept. In most
cases, the default values work well.
Edge Port
5 4 3 2 1
6 7 8
LINK
MODE LINK
MODE
FAULT
RPS
MASTER
PWR
MODE STATUS
AT-8524M Fast Ethernet Switch
Point-to-Point and Edge Port
Workstation
(Full-duplex Mode)
LINK MODE
LINK
MODE
FAULT
RPS MASTER
PWR
MODE STATUS
AT-8524M Fast Ethernet Switch