Classifier - ZyXEL Communications GS3700 Series User Manual

This chapt er int roduces and shows you how t o configure t he packet classifier on t he Swit ch.
19.1 About the Classifier and QoS
Qualit y of Service ( QoS) refers t o bot h a net work's abilit y t o deliver dat a wit h m inim um delay, and
t he net working m et hods used t o cont rol t he use of bandwidt h. Wit hout QoS, all t raffic dat a is
equally likely t o be dropped when t he net work is congest ed. This can cause a reduct ion in net work
perform ance and m ake t he net work inadequat e for t im e- crit ical applicat ion such as video- on-
dem and.
A classifier groups t raffic int o dat a flows according t o specific crit eria such as t he source address,
dest inat ion address, source port num ber, dest inat ion port num ber or incom ing port num ber. For
exam ple, you can configure a classifier t o select t raffic from t he sam e prot ocol port ( such as Telnet )
t o form a flow.
Configure QoS on t he Swit ch t o group and priorit ize applicat ion t raffic and fine- t une net work
perform ance. Set t ing up QoS involves t wo separat e st eps:
1 Configure classifiers t o sort t raffic int o different flows.
2 Configure policy rules t o define act ions t o be perform ed for a classified t raffic flow ( refer t o
20 on page 210
You can also configure policy rout ing t o forward a classified t raffic flow t o a different gat eway for
cost savings and load sharing. See
19.2 Classifier Status
Use t his screen t o t o view t he classifiers configured on t he Swit ch and how m any t im es t he t raffic
m at ches t he rules.
Click Adva n ce d Applica t ion > Cla ssifie r in t he navigat ion panel t o display t he configurat ion
screen as shown.
t o configure policy rules) .
Chapt er 41 on page 400
GS3700/XGS3700 Series User's Guide
201
C
HAPTER
for how t o configure policy rout ing.
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Classifier

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