Avaya BSGx4e CLI Guide de l'utilisateur télécharger pdf (Page 92)

QoS (GoS) commands 3 Configuration commands

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You can configure a quality group explicitly defined as best effort (BE). The

defined BE quality group replaces the hidden, default BE group. Unlike the

default BE group, a defined BE quality group does appear in the quality

group list.

Downstream QoS functions differently than the upstream QoS described in

the preceding sections. Downstream QoS controls the WAN link by

dynamically limiting the bandwidth available to TCP (non-quality) traffic

when quality traffic such as VoIP (using UDP) is present. By limiting

bandwidth for non-quality traffic, which is mostly Web pages and email,

quality traffic experiences only minimal packet loss and delay.

Syntax config qos group <name> link [eth0|eth1] qg

[A1|A2|A3|B1|B2|B3|C1|C2|C3|BE] type [car|policed|bestefford]

committed <rate> burst <rate> iptos [<value>|no] cos

[<value>|no] downstreamgos [yes|no]

Parameters name The name of the quality group to be created or

edited. Assign the QoS group video to protect

video traffic. Assign the QoS group appqos to

protect multimedia traffic other than audio and

video.

link eth0|eth1

Enter the interface to which this link applies.

qg A1|A2|A3|B1|B2|B3|C1|C2|C3|BE

Enter the GoS class. Up to 10 quality groups

can be assigned to the same GoS class. The

default is A1.

type car|policed|besteffort

Enter a quality group type. The default is

policed.

committed rate Enter the committed rate for the quality group

(in bps). Specify a value if qg is not BE. The

minimum rate is 64000. The maximum rate is

90 percent of the total link rate (as specified in

qos link on page 94

burst rate Enter the burst rate for the quality group (in

bps). Specify a value if qg is CAR. The burst rate

must be greater than the committed rate and

less than or equal to the maximum link rate (as

specified in qos link on page 94

iptos value|no Enter an IP ToS value to be written into each

packet assigned to this quality group (decimal,

0-255). Specify no if no ToS value is to be

written. If supported by the upstream router,

the ToS value can notify the router to minimize

delay/cost or maximize throughput.

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Avaya BSGx4e CLI Guide de l'utilisateur Page 92

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