Juniper EX9200 Series Overview Manual page 31

Class of service overview and examples

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Chapter 3: Packet Flow Through the CoS Process

Each outer box in

Figure 3 on page 16

represents a process component. The components

in the upper row apply to inbound packets, and the components in the lower row apply

to outbound packets. The arrows with the solid lines point in the direction of packet flow.

The middle box (forwarding class and loss priority) represents two data values that can

either be inputs to or outputs of the process components. The arrows with the dotted

lines indicate inputs and outputs (or settings and actions based on settings). For example,

the multifield classifier sets the forwarding class and loss priority of incoming packets.

This means that the forwarding class and loss priority are outputs of the classifier; thus,

the arrow points away from the classifier. The scheduler receives the forwarding class

and loss priority settings, and queues the outgoing packet based on those settings. This

means that the forwarding class and loss priority are inputs to the scheduler; thus, the

arrow points to the scheduler.

Typically, only a combination of some components (not all) is used to define a CoS

service offering.

Packet Flow Through the CoS Process Configuration Example

Documentation

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