Example: Simple Shared Shaping For Atm Vps - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

JunosE 11.3.x Quality of Service Configuration Guide
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Example: Simple Shared Shaping for ATM VPs

80
(config-scheduler-profile)#shared-shaping-rate 1000000 simple
(config-scheduler-profile)#exit
(config)#qos-profile subscriber-default-mode
(config-qos-profile)#atm-vc node
(config-qos-profile)#atm-vc node group AF
(config-qos-profile)#atm-vc node group EF
(config-qos-profile)#atm-vc queue traffic-class best-effort scheduler-profile
shared-1mbps
(config-qos-profile)#atm-vc queue traffic-class video scheduler-profile 300kbps
(config-qos-profile)#atm-vc queue traffic-class voice scheduler-profile 200kbps
(config-qos-profile)#exit
Delete the rule in the default port type profile that creates IP best-effort queues by
3.
default.
config)#qos-profile atm-default
(config-qos-profile)#no ip queue traffic-class best-effort
(config-qos-profile)#exit
Attach the profile to the ATM subinterface for VC 3.
4.
(config)#interface atm 11/0.10
(config-subif)#qos-profile subscriber-default-mode
(config-scheduler-profile)#exit
The qos-profile subscriber-default-mode command shown in this example is appropriate
if you have configured the SAR to be in default mode (by issuing the no qos-mode-port
command). If this QoS profile is attached in low-CDV mode, the shaper is effective but
the CDV is not correctly bounded, because the VC is not reshaped in the SAR.
The following commands configure a QoS profile different from the one shown in the
previous example. In this example, the best-effort scheduler node for VC 3 is shaped to
a shared rate of 1 Mbps. The qos-profile subscriber-low-cdv-mode command is
appropriate if you configure the SAR in low-CDV mode (by issuing the qos-mode-port
low-cdv command). The VC is reshaped to 1 Mbps in the SAR. If this QoS profile is
attached in the SAR default mode, the 1-Mbps shaper is disabled by VC backpressure
from the SAR.
(config)#qos-profile subscriber-low-cdv-mode
(config-qos-profile)#atm-vc node scheduler-profile shared-1mbps
(config-qos-profile)#atm-vc node group AF
(config-qos-profile)#atm-vc node group EF
(config-qos-profile)#atm-vc queue traffic-class best-effort
(config-qos-profile)#atm-vc queue traffic-class video scheduler-profile 300kbps
(config-qos-profile)#atm-vc queue traffic-class voice scheduler-profile 200kbps
(config-qos-profile)#exit
Configuring Simple Shared Shaping on page 77
Simple Shared Shaping Overview on page 75
In the example shown in Figure 20 on page 81, VP 1 is shaped to a shared rate of 5 Mbps.
The shared shaper requires that voice and video traffic be carried in queues associated
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