Allied Telesis AT-S60 - Manual (Page 237)

AT-S60 Management Software User’s Guide
Section II: Advanced Features 237
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 72 illustrates a port on an AT-8411 TX line card functioning both
as point-to-point and edge.
Figure 72 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 you have a good grasp of the
concept. In most cases, the default values work fine.
Mixed STP and
RSTP Networks
RSTP IEEE 802.1w is fully compliant with STP IEEE 802.1d. Your network
can consist of bridges running both protocols. STP and RSTP in the same
network should be able to operate together to create a single spanning
tree domain.
You can activate RSTP on an AT-8400 Series switch even when all of the
other switches are running STP. The AT-8400 Series switch can combine
its RSTP with the STP of the other switches. An AT-8400 Series switch
monitors the traffic on each port for BPDU packets. Ports that receive
RSTP BPDU packets operate in RSTP while ports receiving STP BPDU
packets operate in STP.
Spanning Tree
and VLANs
The STP and RSTP implementations on an AT-8400 Series switch are
single-instance spanning trees. They support one spanning tree domain.
(To define multiple spanning trees, you can use MSTP. For information,
refer to MSTP Overview on page 258.)
Point-to-Point and Edge Port
Workstation
(Full-duplex Mode)
AT-8400
Modular Switch System
2 3 4 5 6 M 7 8 9 10 11 12 1
AT-8401
RS-232 TERMINAL PORT
POWER
FAN A
WAIT
MASTER
FAULT
FAN B
DISCON
SLAVE
RESET
AT-8411
PWR
EJECT
LNK 10 ACT 100
AT-8411
PWR
EJECT
LNK 10 ACT 100
AT-8411
PWR
EJECT
LNK 10 ACT 100
AT-8411
PWR
EJECT
LNK 10 ACT 100
AT-8411
PWR
EJECT
LNK 10 ACT 100