SCTP: chunk fragmentation is not yet supported? Help!

[Daniel Anguita]

Hi Everyone,

I'm using ns2 to simulate and test performance of an application over
different protocols. The first tests with TCP where very easy to do, but now
i'm trying with SCTP and everything was going well till i got this message:

SCTP ERROR: message size (10240) too big
SCTP ERROR: data chunk size (10256) + SCTP/IP header(34) > MTU (1500)
           ...chunk fragmentation is not yet supported!

What i did is to create a new Application that is aware of SCTP protocol, so
I can use the AppData settings and test a few things.
I also add a "priority" flag on the SCTP Header that I use to mark each
"data chunk" to know each priority, because later i want to add a per-flow
priority algorithm.
I'm doing this for my master thesis, and i'm working on ns2 from the
beginning.

BUT, what i didn't know is that SCTP didnt support chunk fragmentation yet!
(i'm fool, i didnt read things right)

I am very scared, because I may loose all my work that I've accomplished so
far. Because without this feauture, i cant test my theory....

Anyone knows some work around? is there any patch to add fragmentation
support?
My only hope is to implement it myself? (i wish not)

I need to mesure the bandwith speed and packet delay/loss over a given
topology and a given application with different protocols.

Please.. HELP!

Thanks in advance guys, bye.


--
Daniel Anguita O.
UTFSM - Master Thesis

[Daniel Anguita]

Or this message should be to de developers list?

Help!

2009/11/4 Daniel Anguita <daniel.anguita@...>

> Hi Everyone,
>
> I'm using ns2 to simulate and test performance of an application over
> different protocols. The first tests with TCP where very easy to do, but now
> i'm trying with SCTP and everything was going well till i got this message:
>
> SCTP ERROR: message size (10240) too big
> SCTP ERROR: data chunk size (10256) + SCTP/IP header(34) > MTU (1500)
>            ...chunk fragmentation is not yet supported!
>
> What i did is to create a new Application that is aware of SCTP protocol,
> so I can use the AppData settings and test a few things.
> I also add a "priority" flag on the SCTP Header that I use to mark each
> "data chunk" to know each priority, because later i want to add a per-flow
> priority algorithm.
> I'm doing this for my master thesis, and i'm working on ns2 from the
> beginning.
>
> BUT, what i didn't know is that SCTP didnt support chunk fragmentation yet!
> (i'm fool, i didnt read things right)
>
> I am very scared, because I may loose all my work that I've accomplished so
> far. Because without this feauture, i cant test my theory....
>
> Anyone knows some work around? is there any patch to add fragmentation
> support?
> My only hope is to implement it myself? (i wish not)
>
> I need to mesure the bandwith speed and packet delay/loss over a given
> topology and a given application with different protocols.
>
> Please.. HELP!
>
> Thanks in advance guys, bye.
>
>
> --
> Daniel Anguita O.
> UTFSM - Master Thesis
>

--
Atte.
Daniel Anguita O.
Austral Technologies Ltda.
_______________________
Skype: daniel.anguita
Phone: [phone]
danguita@...
_______________________
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[Daniel Anguita]

anyone? help!

regards

2009/11/5 Daniel Anguita <daniel.anguita@...>

> Or this message should be to de developers list?
>
> Help!
>
> 2009/11/4 Daniel Anguita <daniel.anguita@...>
>
> Hi Everyone,
>>
>> I'm using ns2 to simulate and test performance of an application over
>> different protocols. The first tests with TCP where very easy to do, but now
>> i'm trying with SCTP and everything was going well till i got this message:
>>
>> SCTP ERROR: message size (10240) too big
>> SCTP ERROR: data chunk size (10256) + SCTP/IP header(34) > MTU (1500)
>>            ...chunk fragmentation is not yet supported!
>>
>> What i did is to create a new Application that is aware of SCTP protocol,
>> so I can use the AppData settings and test a few things.
>> I also add a "priority" flag on the SCTP Header that I use to mark each
>> "data chunk" to know each priority, because later i want to add a per-flow
>> priority algorithm.
>> I'm doing this for my master thesis, and i'm working on ns2 from the
>> beginning.
>>
>> BUT, what i didn't know is that SCTP didnt support chunk fragmentation
>> yet! (i'm fool, i didnt read things right)
>>
>> I am very scared, because I may loose all my work that I've accomplished
>> so far. Because without this feauture, i cant test my theory....
>>
>> Anyone knows some work around? is there any patch to add fragmentation
>> support?
>> My only hope is to implement it myself? (i wish not)
>>
>> I need to mesure the bandwith speed and packet delay/loss over a given
>> topology and a given application with different protocols.
>>
>> Please.. HELP!
>>
>> Thanks in advance guys, bye.
>>
>>
>> --
>> Daniel Anguita O.
>> UTFSM - Master Thesis
>>
>
>
>
> --
> Atte.
> Daniel Anguita O.
> Austral Technologies Ltda.
> _______________________
> Skype: daniel.anguita
> Phone: [phone]
> danguita@...
> _______________________
> Noticia: La información contenida en este mensaje e-mail y/o archivos
> adjuntos pueden contener información confidencial, privada o privilegiada.
> Si usted no es el destinario, cualquier difusión, uso, revisión,
> distribución, impresión o copia de la información, contenida en este mensaje
> de correo electrónico y/o archivos adjuntos, están estrictamente prohibidas.
> Si ha recibido esta comunicación por error, por favor avísenos respondiente
> por e-mail o teléfono e inmediatamente y permanentemente elimine este
> mensaje y cualquier archivo adjunto. Gracias.
>

--
Atte.
Daniel Anguita O.
Austral Technologies Ltda.
_______________________
Skype: daniel.anguita
Phone: [phone]
danguita@...
_______________________
Noticia: La información contenida en este mensaje e-mail y/o archivos
adjuntos pueden contener información confidencial, privada o privilegiada.
Si usted no es el destinario, cualquier difusión, uso, revisión,
distribución, impresión o copia de la información, contenida en este mensaje
de correo electrónico y/o archivos adjuntos, están estrictamente prohibidas.
Si ha recibido esta comunicación por error, por favor avísenos respondiente
por e-mail o teléfono e inmediatamente y permanentemente elimine este
mensaje y cualquier archivo adjunto. Gracias.