Configuring the QoS Policy
R81.10.X Quantum Spark 1500, 1600, 1800, 1900, 2000 Appliances Locally Managed Administration Guide|267
Weight
QoS divides available bandwidth across the QoS policy rules based on
weight
. The use of
weights instead of specified percentages is a flexible way for the QoS engine to allocate
bandwidth if the maximum bandwidth is exceeded based on the specified traffic at that point.
This maximizes the usage of the bandwidth.
For example, in an organization, Web traffic is deemed three times as important as FTP traffic.
Rules with these services are assigned weights of 30 and 10 respectively. If the lines are
congested, QoS keeps the ratio of bandwidth allocated to Web traffic and FTP traffic at 3 to 1.
You can set options for the default policy or you can manually define rules for the QoS policy. If
a rule does not use all of its bandwidth, the leftover bandwidth is divided with the remaining
rules, based on their relative weights. In the above example, if only one Web and one FTP
connection are active and they compete, the Web connection receives 75% (30/40) of the
leftover bandwidth, and the FTP connection receives 25% (10/40) of the leftover bandwidth. If
the Web connection closes, the FTP connection receives 100% of the bandwidth.
In the Weight field, enter a value that shows the services importance relative to other defined
services. For example, if you enter a weight of 100 for a service and set 50 for a different
service, the first service is allocated two times the amount of bandwidth as the second when
lines are congested.
To Next Page
Loading...
