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Configuring Quality of Service
Cisco ISA500 Series Integrated Security Appliances Administration Guide 155
4
Configuring Quality of Service
The Quality of Service (QoS) feature is applied throughout the network to ensure
that network traffic is prioritized according to required criteria and that the desired
traffic receives preferential treatment.
QoS guarantees are important if the network capacity is insufficient, especially for
real-time streaming multimedia applications such as voice over IP, online games,
and IPTV, since these applications are delay sensitive and often require a fixed bit
rate.
Refer to the following topics:
• General QoS Settings, page 155
• Configuring WAN QoS, page 156
• Configuring LAN QoS, page 166
• Configuring Wireless QoS, page 169
• Understanding DSCP Values
General QoS Settings
Use the General Settings page to enable or disable the WAN QoS, LAN QoS, and
WLAN QoS features.
STEP 1 Click Networking > QoS > General Settings.
STEP 2 Enter the following information:
• WAN QoS: Check this box to enable WAN QoS. By default, WAN QoS is
disabled.
• LAN QoS: Check this box to enable LAN QoS. LAN QoS specifies priority
values that can be used to differentiate traffic and give preference to
higher-priority traffic, such as telephone calls. By default, LAN QoS is
disabled.
• Wireless QoS: Check this box to enable Wireless QoS. Wireless QoS
controls priority differentiation for data packets in wireless egress direction.
By default, Wireless QoS is disabled. The wireless QoS only applies to the
ISA550W and ISA570W.