Opnet Project

7/25/2019 Opnet Project

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Part1: Small Internetworks

Question1.Find the error printout that tells us what is wrong. Submit themessage and where you found it.

Answer1. It does not work correctly as there is no trac

Fig1: Ethernet Load for First Floor

Fig1-- x-axis: time in minutes y-axis: number of bits

!s we can see" load is #ero throughout implicating that there is no trac i.e theser$er has #ero load on it. %aybe the nodes are not mapped to the ser$er. &'hisis because !pplication: (e)nition *alues is selected as +,one.

/heck the error log in 0elp Show !ll 2ogs3In the 2og *iewer window" the log of compilation can be $iewed. It shows theerror4warning message with its se$erity" time of occurrence" node at which itoccurred" the class and sub class as well.

5ead the error4warning message and debug.Fig2: Error Log1


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!s we can see" !pplication is unknown in +!pplication (e)nition. 'hus" it will beignored by all the clients and #ero trac is generated.

Fig3: Error Log2

!s we can see" Ser$ice is unknown in +!pplication (e)nition. 'hus" the ser$er

wont be connected by clients" hence no trac.

'hese warnings are easy to )x. 5ight click the !pplication (e)nition node 6dit !ttributes choose $alue of !pplication (e)nitions as +(efault instead of+,one.

Part2: Small Internetworks Expansion


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Question2. 5un the simulation of small internetworks with 78 additional nodes.9se last digits of your I( number as simulation seed.

Seed used for simulation: 87;n a single screen" a comparison of the ?time a$erage@ graphs of ?6thernet2oads /ompared@ for the )rstABoor and the expansion.

Fig4: Comparing time average graphs of Ethernet Load for First Floor and theExpansion

Fig7-- x-axis: time in minutes y-axis: number of bits

Clue graph line: 6thernet 2oad for the 6xpansion5ed graph line: 6thernet 2oad for First Floor

B_ >n a single screen" a comparison of the ?!s Is@ graphs of ?6thernet (elay/ompared@ for the )rstABoor and the expansion.


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Fig5: Comparing As Is graphs of Ethernet Dela for First Floor and the Expansion

Fig7-- x-axis: duration of run in minutes y-axis: time delay in sec

Clue graph line: 6thernet 2oad for the 6xpansion

5ed graph line: 6thernet 2oad for First Floor

C_Dhy is there almost no diEerence in the graphs of b. but a lot in the graphs of

a.

raph in a: /omparing +time a$erage of 6thernet 2oad for First Floor and the6xpansion!$erage load for 6xpansion is higher than the a$erage load for )rst Boor. 'heexpansion load graph is le$elling oE at around 88 bits while the )rst Boor loadgraph is le$elling oE at around


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raph in b: /omparing +!s Is of 6thernet (elay for First Floor and the 6xpansion!s we can see" for both )rst Boor and the expansion" after the network reachessteady state" the maximum delay is around 8.71 msec. 'here is no signi)cantchange in 6thernet delay on network despite of increase in ser$er load. 6thernet

delay is basically intrinsic to the medium and material of medium. It doesntdepend on the load.D_Is the change in 6thernet (elay proportional to the change in the 6thernet

2oadG Dhy notG

From the graphs in part !A and CA" it is clear that 6thernet (elay is notproportional to the change in the 6thernet 2oad. !$erage load for 6xpansion ishigher than the a$erage load for )rst Boor &as expected as the number of nodesincreased i.e ser$er load increased from H8 nodes to =8 nodes. Still" both thegraphs are le$elling oE indicating stable networks. Cut" there is no signi)cantchange in 6thernet delay on network despite of increase in ser$er load. 'his is

because 6thernet delay is intrinsic to material of medium and doesnt depend onthe load.

N!E: PA"! # N NE$! PA%E&. P'EASE SC"'' D(N


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Part#: Expansion Network )*+ no,es- ets /ea0il loa,e, wit/ Dataase

Queries

Question#. 5un the simulation with last digits of your I( number as simulation

seed.

Seed used for simulation: 87;


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Clue graph line: 6thernet (elay for the (atabase !ccess 0ea$y5ed graph line: 6thernet (elay for 6xpansion

!$erage delay for 6xpansion is &not $isible in graph but as shown in Fig7 around8.88871 sec. (elay for (C !ccess 0ea$y is not le$elling oE and the delay is

increasing with run time" this means the system is not stabili#ing itself&approaching unstable network or the Lueuing delay is increasing. It achie$es itspeak delay of around 8.


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Fig=-- x-axis: duration of run in minutes y-axis: 5esponse time in sec

Suppose some node x reLuested for some data. 5esponse time is the total time it

takes to fetch the data and pro$ide it to the node. !s we added a (atabase

!ccess &0ea$y application to 78 nodes in the expansion" all the clients &nodeH7 -

node=H will use an additional application of (atabase !ccess &0ea$y. 'hesenodes are hea$ily loaded. 'he inter reLuest time between Lueries has been

drastically reduced to 8.7 sec" leading to more number of reLuest Lueries

Boating in the network. 'hus" the time it takes to ser$e the node has increased a

lot. 'he graph abo$e shows the peak response time of around 8.K sec.

C_i$en the )le si#e is


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$ery careful about K8M command mix here. ou need not account for the (Centries and o$erhead network trac.

Fig): D* &a"le for Light Fig+: D* &a"le for $eav

File Si#e N


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N &TransactionNodes xTransactionMix

InterrequestTime 0ea$y O &

TransactionNodes xTransactionMix

Interrequest Time 2ight

N &160k 400.6

0.45 O &128700.5

30

N ;HH.


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Fig18-- x-axis: duration of run in minutes y-axis: 5esponse time in sec

>n the reLuest of boss" the inter reLuest time has been reduced e$en more to8.7


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Fig11-- x-axis: duration of run in minutes y-axis: 6thernet load in bps

Fig12: Ethernet Dela for Data"ase A##ess $eav

Fig1

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