Allied Telesis AT-8550 - Manual (Page 17)

AT-9108, AT-8518, AT-8525, and AT-8550 User’s Guide
1-3
Spanning Tree
Protocol
(
STP
)
The switches support the IEEE 802.1D Spanning Tree Protocol (STP),
which is a bridge-based mechanism for providing fault tolerance on
networks. STP enables you to implement parallel paths for network
traffic, and ensure the following:
❑ Redundant paths are disabled when the main paths are
operational.
❑ Redundant paths are enabled if the main traffic paths fail.
The switch supports up to 64 Spanning Tree Domains (STPDs).
Note
For more information on STP, refer to Chapter 6 .
Quality of Service
(QoS)
The switches have Policy-Based Quality of Service (QoS) features that
enable you to specify service levels for different traffic groups. By
default, all traffic is assigned the “normal” QoS policy profile. If
needed, you can create other QoS policies and apply them to
different traffic types so that they have different guaranteed
minimum bandwidth, maximum bandwidth, and priority.
Note
For more information on Quality of Service, refer to Chapter 7 .
Unicast Routing
The switches can route IP or IPX traffic between the VLANs that are
configured as virtual router interfaces. Both dynamic and static IP
routes are maintained in the routing table. The following routing
protocols are supported:
❑ RIP version 1
❑ RIP version 2
❑ OSPF
❑ IPX/RIP
Note
For more information on IP unicast routing, refer to Chapter 8 . For
more information on IPX/RIP, refer to Chapter 11 .