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Table 33 Policy Screen
LABEL
Diffserv
Out going
Rat e Lim it
Add
Cancel
Clear
I ndex
Act ive
Nam e
Rule
Delet e
Delet e
Cancel
6.14 Queuing Method
Set queue priorit y. There are four queuing m odes: SPQ, WRR, WFQ, and SP+ WFQ. The default
queuing m et hod is SPQ.
Strictly Priority Queuing
St rict ly Priorit y Queuing ( SPQ) services queues based on priorit y only. As t raffic com es int o t he
Swit ch, t raffic on t he highest priorit y queue, Q7 is t ransm it t ed first . When t hat queue em pt ies,
t raffic on t he next highest- priorit y queue, Q6 is t ransm it t ed unt il Q6 em pt ies, and t hen t raffic is
t ransm it t ed on Q5 and so on. I f higher priorit y queues never em pt y, t hen t raffic on lower priorit y
queues never get s sent . SPQ does not aut om at ically adapt t o changing net work requirem ent s.
Weighted Fair Queuing
Weight ed Fair Queuing is used t o guarant ee each queue's m inim um bandwidt h based on it s
bandwidt h weight ( port ion) ( t he num ber you configure in t he Weight field) when t here is t raffic
congest ion. WFQ is act ivat ed only when a port has m ore t raffic t han it can handle. Queues wit h
larger weight s get m ore guarant eed bandwidt h t han queues wit h sm aller weight s. This queuing
m echanism is highly efficient in t hat it divides any available bandwidt h across t he different t raffic
queues. By default , t he weight for Q0 is 1, for Q1 is 2, for Q2 is 3, and so on.
Chapter 6 Advanced Application Configurations
DESCRIPTION
Select N o ch a n ge t o keep t he TOS and/ or DSCP fields in t he packet s.
Select Se t t h e pa ck e t 's TOS fie ld t o set t he TOS field wit h t he value you configure in
t he TOS field.
Select Se t t h e D iffse r v Code poin t fie ld in t h e fr a m e t o set t he DSCP field wit h t he
value you configure in t he D SCP field.
Select Se nd t h e pa ck e t t o t he e gr e ss por t t o send t he packet t o t he egress port .
Set t he rat e lim it . Default is not select ed.
Click Add t o inset t he ent ry t o t he sum m ary t able below and save your changes t o t he
Swit ch's run- t im e m em ory. The Swit ch loses t hese changes if it is t urned off or loses
power.
Click Ca n ce l t o reset t he fields back t o your previous configurat ion.
Click Cle a r t o delet e t he configurat ions of t he above fields.
This field displays t he policy index num ber. Click an index num ber t o edit t he policy.
This field displays Ye s when policy is act ivat ed and N o when is it deact ivat ed.
This field displays t he nam e you have assigned t o t his policy.
This field displays t he policy you configured.
Click D e le t e t o rem ove t he select ed ent ry from t he sum m ary t able.
Click D e le t e t o rem ove.
Click Ca n ce l t o clear t he check boxes.
MGS3750-28F User's Guide
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