3Com 3C13636 Configuration Manual page 1345

Router 3000 ethernet family

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3Com Router 3000 Ethernet Family

Configuration Guide

B and finally to Router D. QoS policy is required in configuration. For the data streams

with DSCP domain being AF11 and AF21, AF (assured forwarding) and minimum

bandwidth 5% is defined, while for those with DSCP domain being EF, EF and minimum

bandwidth 30% is specified.

For EF streams, their requirements for bandwidth, delay and jitter can be guaranteed,

while LLQ technology is used to achieve their priority. Only bandwidth can be warranted

in AF streams, while no bandwidth and delay guarantee is available for Default

streams (the streams that do not match any class).

Check the following items before initiating configuration:

Router C can send packets successful across Router A and Router B to Router D.

DSCP domain has been configured for the packets before they enter Router A.

II. Network diagram

Figure 3-7 Network diagram for class-specific queuing configuration

III. Configuration procedure

Configure Router A

# Define three classes, match them respectively with the IP packets with their DSCP

domain respectively being AF11, AF21 and EF.

[3Com] traffic classifier af11_class

[3Com-classifier-af11_class] if-match dscp af11

[3Com-classifier-af11_class] traffic classifier af21

[3Com-classifier-af21] if-match dscp af21

[3Com-classifier-af21] traffic classifier ef_class

[3Com-classifier-ef_class] if-match dscp ef

[3Com-classifier-ef_class] quit

# Define traffic behavior, configure AF and minimum bandwidth.

[3Com] traffic behavior af11_behav

[3Com-behavior-af11_behav] queue af bandwidth pct 5

[3Com-behavior-af11_behav] traffic behavior af21_behav

3Com Corporation

Chapter 3 Congestion Management

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3c13636-us - router 3036 3000 series