ZyXEL Communications MetroGigabit MGS3750-28F User Manual page 51

Chapter 6 Advanced Application Configurations
Table 33 Policy Screen
LABEL DESCRIPTION
Classifier( s) This field displays t he act ive classifier( s) you configure in t he Cla ssifie r screen.
Select t he classifier( s) t o which t his policy rule applies. To select m ore t han one
classifier, press [ SHI FT] and select t he choices at t he sam e t im e.
Param et ers
Set t he fields below for t his policy. You only have t o set t he field( s) t hat is relat ed t o t he act ion( s) you
configure in t he Act ion field.
Egress Port Type t he num ber of an out going port .
Priorit y Specify a priorit y level.
DSCP Specify a DSCP ( DiffServ Code Point ) num ber bet ween 0 and 63.
TOS Specify t he t ype of service ( TOS) priorit y level.
Bandwidt h Specify t he bandwidt h in kilobit per second ( Kbps) . Ent er a num ber bet ween 1 and
1000000.
Act ion Act ion
Specify t he act ion( s) t he Swit ch t akes on t he associat ed classified t raffic flow.
Note: You can specify only one action (pair) in a policy rule. To have the Switch take
Say you have several classifiers t hat ident ify t he sam e t raffic flow and you specify a
different policy rule for each. I f t heir policy act ions conflict ( D isca r d t h e pa ck e t ,
Se n d t h e pa ck e t t o t h e e gr e ss por t and Ra t e Lim it ) , t he Swit ch only applies t he
policy rules wit h t he D isca r d t he pa ck e t and Se n d t h e pa ck e t t o t h e e gr e ss por t
act ions depending on t he classifier nam es. The longer t he classifier nam e, t he higher
t he classifier priorit y. I f t wo classifier nam es are t he sam e lengt h, t he bigger t he
charact er, t he higher t he classifier priorit y. The lowercase let t ers ( such as a and b)
have higher priorit y t han t he capit als ( such as A and B) in t he classifier nam e. For
exam ple, t he classifier wit h t he nam e of class 2, class a or class B t akes priorit y over
t he classifier wit h t he nam e of class 1 or class A.
Let 's say you set t wo classifiers ( Class 1 and Class 2) and bot h ident ify all t raffic from
MAC address 11: 22: 33: 44: 55: 66 on port 3.
I f Policy 1 applies t o Class 1 and t he act ion is t o drop t he packet s, Policy 2 applies t o
Class 2 and t he act ion is t o forward t he packet s t o t he egress port , t he Swit ch w ill
forward t he packet s.
I f Policy 1 applies t o Class 1 and t he act ion is t o drop t he packet s, Policy 2 applies t o
Class 2 and t he act ion is t o enable bandwidt h lim it at ion, t he Swit ch will discard t he
packet s im m ediat ely.
I f Policy 1 applies t o Class 1 and t he act ion is t o forward t he packet s t o t he egress
port , Policy 2 applies t o Class 2 and t he act ion is t o enable bandwidt h lim it at ion, t he
Swit ch will forward t he packet s.
Forwarding Select N o ch a n ge t o forward t he packet s.
Select D isca r d t h e pa ck e t t o drop t he packet s.
Priorit y Select N o ch a n ge t o keep t he priorit y set t ing of t he fram es.
Select Se t t he pa ck e t 's 8 0 2 .1 p pr ior it y a n d se n d t h e pa ck e t t o pr ior it y qu e u e
t o replace t he packet 's 802.1p priorit y field wit h t he value you set in t he Pr ior it y field
and put t he packet s in t he designat ed queue.
multiple actions on the same traffic flow, you need to define multiple classifiers
with the same criteria and apply different policy rules.
MGS3750-28F User's Guide
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