Flow Information; Ipv4 Flow Control; Figure 1-1 Range Of Qos, Filter-Flow Control - Hitachi GR2000 Series Configuration Commands

Hitachi Gigabit Router GR2000 Series Enhanced Version Configuration Commands, Vol. 2
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
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)
7 8
 2 .

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

1-2
Filtring
DSCP Rewrite
Policy routing
Priority
Determination
DSCP Rewrite
Contracted
Bandwidth
Monitoring
Flow Control (output)
7 8
Filtring
DSCP Rewrite
Connection
branching
 2 .
Priority
Determination
DSCP Rewrite
Contracted
Bandwidth
Monitoring
EXP Rewrite
Connection
branching
Flow block setting range
Flow of packet
Que control
Transmission Control
(LINE, DLCI,
8 Queues
GR2K-GA-0014
Ver. 07-02
Interface