S
UMMIT
S
WITCH
I
NSTALLATION
AND
U
SER
G
UIDE
1-5
S
UMMARY
OF
F
EATURES
¥
It helps to control broadcast trafÞc. If a device in VLAN
marketing
transmits a
broadcast frame, only VLAN
marketing
devices receive the frame.
¥
It provides extra security. Devices in VLAN
marketing
can only communicate with
devices on VLAN
sales
using a device that provides routing services.
¥
It eases the change and movement of devices on networks. If a device in VLAN
marketing
is moved to a port in another part of the network, all you must do is
specify that the new port belongs to VLAN
marketing
.
For more information on VLANs, refer to
Chapter 5
.
S
PANNING
T
REE
P
ROTOCOL
(STP)
The Summit supports 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 trafÞc, and ensure the following:
¥
Redundant paths are disabled when the main paths are operational.
¥
Redundant paths are enabled if the main trafÞc paths fail.
The Summit supports up to 64 Spanning Tree Domains (STPDs).
For more information on STP, refer to
Chapter 7
.
Q
UALITY
OF
S
ERVICE
(Q
O
S)
The Summit has Quality of Service (QoS) features that enable you to specify service
levels for different trafÞc groups. By default, all trafÞc is assigned with the ÒnormalÓ
QoS proÞle. If needed, you can conÞgure some trafÞc to have different guaranteed
minimum bandwidth, maximum bandwidth, and priority.
For more information on Quality of Service, refer to
Chapter 8
.
SUMMIT.BK Page 5 Thursday, September 25, 1997 12:33 PM