Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual page 288

JunosE 11.3.x Quality of Service Configuration Guide
Configuring the QoS
Parameter Definition
and Global Parameter
Instance
Reference the
Parameter Definition
Within a Scheduler
Profile
258
Configure the traffic classes.
1.
a. Configure the traffic class named best-effort.
b. Configure the traffic class named voice.
host1(config)#traffic-class voice
host1(config-traffic-class)#exit
host1(config)#traffic-class best-effort
host1(config-traffic-class)#exit
Configure a traffic-class group for low-latency expedited forwarding (EF) and add
2.
the traffic class for voice service into the traffic-class group EF.
a. Configure the EF traffic-class group with strict-priority scheduling.
b. Add the traffic class voice to the traffic-class group.
host1(config)#traffic-class-group EF auto-strict-priority
host1(config-traffic-class-group)#traffic-class voice
host1(config-traffic-class-group)#exit
The remaining traffic class, best-effort, remains in the default traffic-class group.
The QoS administrator configures the QoS parameter definition and specifies the IP
multicast bandwidth adjustment application. The QoS administrator must configure the
parameter as hierarchical.
The QoS scheduler hierarchy is constructed when the subscriber logs on. However,
because the parameter instance has not yet been created, the shared-shaping rate is
undefined (that is, there is no shaping rate).
Therefore, the QoS administrator creates a global parameter instance to shape the
subscriber to the desired bandwidth. The initial value is determined based on the
application; in this example, the QoS administrator specifies 0 as the default.
Configure the QoS parameter definition ipm, associate it with the ip-multicast
1.
application, and assign it as a hierarchical parameter.
Configure a controlled-interface type of atm-vc.
2.
Configure the global parameter instance.
3.
host1(config)#qos-parameter-define ipm application ip-multicast hierarchical
host1(config-qos-parameter-define)#controlled-interface-type atm-vc
host1(config-qos-parameter-define)#exit
host1(config)#qos-parameter ipm 0
Therefore, the initial shared-shaping rate is 10 Mbps (10 Mbps - ipm value of 0).
The QoS administrator configures the scheduler profile for the ATM VC subscriber and
configures the shared-shaping rate. When a scheduler profile references the parameter
instance, it enables the IP multicast bandwidth adjustment application to adjust the
subscriber bandwidth to account for the video traffic.
The QoS administrator then configures the scheduler profile to shape voice traffic.
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