Actiontec electronic RI408 Manuel D’Utilisation
121
Quality of Service
Network-based applications and traffic are growing at a high rate, producing an
ever-increasing demand for bandwidth and network capacity. For obvious reasons,
bandwidth and capacity cannot be expanded infinitely, requiring that bandwidth-
demanding services be delivered over existing infrastructure, without incurring
additional expensive investments. The next logical means of ensuring optimal
use of existing resources are Quality of Service (
ever-increasing demand for bandwidth and network capacity. For obvious reasons,
bandwidth and capacity cannot be expanded infinitely, requiring that bandwidth-
demanding services be delivered over existing infrastructure, without incurring
additional expensive investments. The next logical means of ensuring optimal
use of existing resources are Quality of Service (
Q
o
S
) mechanisms for congestion
management and avoidance.
Quality of Service refers to the capability of a network device to provide better ser-
vice to selected network traffic. This is achieved by shaping the traffic and process-
ing higher priority traffic before lower priority traffic.
vice to selected network traffic. This is achieved by shaping the traffic and process-
ing higher priority traffic before lower priority traffic.
I
STOP! Do not change any Quality of Service settings unless
instructed to do so by the
instructed to do so by the
ISP
.
Traffic Priority
Traffic Priority manages and avoid traffic congestion by defining inbound and out-
bound priority rules for each device on the Router. These rules determine the pri-
ority that packets, traveling through the device, will receive.
bound priority rules for each device on the Router. These rules determine the pri-
ority that packets, traveling through the device, will receive.
Q
o
S
parameters (
DSCP
marking and packet priority) are set per packet, on an application basis.
Q
o
S
can be configured using flexible rules, according to the following parameters:
• Source/destination
IP
address,
MAC
address, or host name
• Device
• Source/destination ports
• Limit the rule for specific days and hours
The Router supports two priority marking methods for packet prioritization:
•
DSCP
• 802.1p Priority
A