Gigabit Router Configuration Guide

ManualsBrandsHitachi ManualsNetwork RouterGR2000 Series

Hitachi Gigabit Router GR2000 SeriesEnhanced Version Configuration Commands, Vol. 2

1-2 GR2K-GA-0014

Ver. 07-02

1.1 Flow 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.

1.1.1 IPv4 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

performsdeterminationontheflowcontrolintheorderof(a)thefilterfunctionon

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.

Abriefexplanationonthecontentsisgivenoneachcontrolblockconstitutingthe

flow control as are the related constituting definition commands.

Figure 1-1 Range of QoS, Filter-Flow Control

Flow Control (input)

Flow Control (output)

Policy routing

Filtring

DSCP Rewrite

iltring

DSCP Rewrite

Connection

branching

Interface

(LINE, DLCI,

Transmission Control

8 Queues

Que control

Priority

Determination

DSCP Rewrite

Contracted

Bandwidth

Monitoring

Priority

Determination

DSCP Rewrite

Contracted

Bandwidth

Monitoring

EXP Rewrite

Connection

branching

Switch

Flow block setting range

Flow of packet

Flow Detection