U S I N G Q O S T R A F F I C S H A P I N - Secure Computing SnapGear Application Note

Using QoS traffic
shaping
Figure 2: QoS
Autoshaper in non-
configurable state
Figure 3: QoS
Autoshaper in
configurable state
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QoS (Quality of Service) traffic shaping is an advanced feature provided to
allow the fine-tuning of network connections. Traffic shaping allows you to give
preference to certain types of network traffic to maintain quality of service when
a network connection is under heavy load.
Enabling QoS Autoshaper
The Autoshaper uses a set of built-in traffic shaping rules that create rate-
controlled queues based on the upstream and downstream bandwidth to your
ISP. It works in conjunction with the ToS Packet Priority configuration. (See
"Using the SnapGear VPN solution" on page 16.) To activate traffic shaping
and control rules, do the following:
1 Under the Network Setup menu, select
Autoshaper tab reads like Figure 2, you have failed to configure a LAN or
Internet connection, or you have configured more than one LAN, for
example, a wireless LAN.
If you must use the wireless LAN, additional LANs, or a DMZ, the QoS
Autoshaper cannot be used. Some QoS priorities can still be set using the
ToS Packet Priority tab. You may still use more than one Internet connec-
tion by setting the bandwidth for each connection as discussed below.
2 If the QoS Autoshaper tab reads like Figure 3, click the
on the far right side of the row to configure each connection.
Setting up SnapGear for VoIP
Using QoS traffic shaping
. If the QoS
QoS Traffic Shaping
Pencil & Paper
icon
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