User Guide

Networking
Configuring Quality of Service
Cisco ISA500 Series Integrated Security Appliances Administration Guide 164
4
• Configure WAN QoS for the inbound voice traffic. For complete details, see
Configuring WAN QoS for Voice Traffic from WAN to LAN, page 165.
Configure WAN QoS for Voice Traffic from LAN to WAN
Follow these steps to configure WAN QoS to manage the outbound voice traffic
from LAN to WAN:
STEP 1 Go to the Networking > QoS > WAN QoS > Queue Settings page to determine how
traffic in queues is handled for the WAN port.
a. Select the Low Latency Queuing (LLQ) radio button. LLQ allows
delay-sensitive data (such as voice traffic) to be given preferential treatment
over other traffic by letting the data to be de-queued and sent first.
a. Enter the amount of bandwidth assigned to Q1. Q1 has the highest priority and
is always processed to completion before the lower priority queues.
b. Enter the percentage assigned to other queues (Q2 to Q6) that you want to use.
STEP 2 Go to the Networking > QoS > WAN QoS > Traffic Selector (Classification) page to
add two traffic selectors used to classify the outbound voice and data traffic.
a. Add a traffic selector as follows to classify the outbound data traffic:
b. Add a traffic selector as follows to classify the outbound voice traffic:
STEP 3 Go to the Networking > QoS > WAN QoS > QoS Policy Profile page to add a
class-based QoS policy profile to manage the outbound voice and data traffic
through the WAN port.
a. Add a WAN QoS policy profile as follows:
Class Name data-outbound-class
VLAN Default VLAN
Class Name voice-outbound-class
Source Address voice_phone_ip
Policy Name voice-outbound-profile
Apply this policy to Outbound Traffic