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PMIT - 6103

Advanced Networking & Internet Technologies

By Zamshed Iqbal Chowdhury

Lecturer, IIT, JU

Lecture 081

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Topics

ac!et "cheduli#$ %or &o"ma#a$eme#t

'e%ere#ce Boo!( )i$h "peed Computer *etwor!s by

+illiam "talli#$s

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-ulti.ser/ice #etwor!

"i#$le #etwor! i#%rastructure carryi#$trac %rom diere#t ser/ices 2data, /oice,/ideo3334 i# a# i#te$rated way

5iere#t quality o% ser/ice requireme#ts tobe met

6

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er%orma#ce Bou#ds

5etermi#istic holdi#$ %or e/ery pac!et se#t o# a co##ectio#

"tatistical robability that a pac!et /iolates the bou#d is less tha#

a speci7ed /alue

o#e.i#.* bou#d, #o more tha# o#e pac!et i# *co#secuti/e pac!ets /iolates the bou#d

Commo# per%orma#ce bou#ds

mi#imum ba#dwidth maimum loss

maimum delay

maimum delay 9itter

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The role o% the #etwor!

The #etwor! should ha/e e#ou$h resourcesa/ailable to be able to satis%y the per%orma#cebou#ds required by the applicatio#

admissio# co#trol co#$estio# co#trol

The #etwor! should ecie#tly ma#a$e theresources a/ailable i# order to $uara#tee a

quality o% ser/ice acceptable to theapplicatio# pac!et scheduli#$ at i#termediate #odes

;

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ac!et scheduli#$

ac!ets are queued at i#termediate #odes store a#d %orward

The ser/er o# each queue must decide which pac!et to ser/ice #et

ma#a$e the queue o% bac!lo$$ed pac!ets The ser/er uses a scheduli#$ discipli#e to

%airly share the resources

pro/ide per%orma#ce $uara#tees

Trade.o betwee# trac isolatio#

circuit switchi#$( $uara#teed dedicated resources

resource shari#$ pac!et switchi#$( complete resource shari#$