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Table 4: Packet Rate for Various Packet Size and Serial Interface Rate Settings

Packet Rate (Packets per Second)

Packet Size (Bytes)

14001024768512256128

Interface Rate

(Kbps)

5.77.810.415.631.362.564

11.415.620.831.362.5125.0128

22.931.341.762.5125.020.0256

91.4125.0166.7250.0500.01000.01024

137.9188.5251.3277.0753.91507.81544

182.9250.0333.3500.01000.02000.02048

Documentation

Configuring IP Parameters for CTP Bundles (CTP Menu) on page 27•

• Configuring IP Parameters for CTP Bundles (CTPView) on page 25

Providing QoS for CTP Bundles by Using Service Type Overview

In IP networks, the IP flow is typically classified based on the Differentiated Services

Code Point (DSCP) setting in the type of service (TOS) byte of the IP header. DSCP is a

scalable solution for classifying flows in a large IP network based on the class of service

desired on specific IP traffic flows.

With the CTP device, you can configure DSCP settings for each circuit’s IP flow. For

example, some circuits could be configured for the expedited forwarding (EF) class.

When the network routers receive this EF-marked flow from the CTP device, they place

the marked traffic into a high-priority queue, enabling this traffic to be serviced before

lower priority traffic. As an EF-marked flow traverses the IP network, routers can use its

classification to provide the flow a more predictable level of performance across the

network

When you configure the service type of a bundle, you specify the ToS byte to be used in

IP headers of packets sent from the CTP device to the IP network. The ToS setting is

applied to circuits created by the bundle for which the service type is configured.

Table 5 on page 10 shows the mapping for each DSCP class and setting to the ToS setting

that you configure as the service type for a bundle. The EF class (ToS setting 184) is

commonly used for circuit traffic.

Table 5: DSCP Classes and Service Type

ToS SettingDSCP SettingDSCP Class

22456CS7

Using Bundles to Create Logical Configurations for Physical Interfaces, CTP Release 7.3, CTPView Release 7.3

Juniper CTP Series User Manual

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