Hitachi Gigabit Router GR2000 Series Enhanced Version Configuration Commands, Vol. 2

1.1Flow Information

The flow control can be divided into the IPv4 flow control noticing on the IPv4 packet and the IPv6 noticing on the IPv6 packet. Explanations are given hereunder on the respective functions, followed by explanations on the constituting definition commands and parameters that define the information given about this flow control.

1.1.1IPv4 Flow Control

The IPv4 flow control is provided with the filter function to relay or discard the packet and the QoS function (the flow control part) to decide the priority for signaling by packet types.

The flow control is set on both interface’s input and output side.. The first stage executes mainly the filter function while the second stage executes mainly the QoS function (flow control part) in each of the input and output sides. The packet performs determination on the flow control in the order of (a) the filter function on the first input side stage, (b) the QoS function on the second input side stage, (c) the filter function on the first output side stage, and (d) the QoS function on the second output side stage.

A brief explanation on the contents is given on each control block constituting the flow control as are the related constituting definition commands.

Flow Control (input)

Flow Control (output)

 

 

 

 

 

 

 

Flow block setting range

Flow

Filtring

Flow

Filtring

 

 

 

 

Flow of packet

 

 

 

Detection

 

Detection

 

 

Policy routing

DSCP Rewrite

 

 

 

DSCP Rewrite

 

 

 

 

 

 

Connection

 

 

 

 

 

branching

 

 

 

 

Switch

Priority

Que control

Transmission Control

 

 

 

 

 

 

 

 

 

 

Determination

 

 

FlowDetection

Priority

 

 

 

 

Determination

FlowDetection

DSCP Rewrite

 

 

Monitoring

EXP Rewrite

 

(LINE, DLCI,

 

DSCP Rewrite

 

Contracted

 

 

 

 

 

Bandwidth

 

 

 

Contracted

 

Monitoring

 

Interface

 

Bandwidth

 

 

 

 

 

 

 

 

8 Queues

 

 

 

Connection

 

 

￿￿78.2

 

￿￿78.2

branching

 

 

Figure 1-1

Range of QoS, Filter-Flow Control

 

 

 

1-2

 

 

 

 

GR2K-GA-0014

 

 

 

 

 

Ver. 07-02

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Hitachi GR2000 Series manual Flow Information, 1 IPv4 Flow Control, Range of QoS, Filter-Flow Control