[OpenSER-Users] IP fragmentation but MB bit not being set

Bogdan-Andrei Iancu bogdan at voice-system.ro
Tue Jul 1 14:45:46 CEST 2008


Hi Juan Pablo,

usually this kind of fragmentation problems were an issue for UDP, but 
never found similar problem for TCP. Actually this the reason why the 
IETF guys want to obsolete UDP for SIP and keep only TCP...

how is generating the packages ? what device? because more or less it 
will responsible for framing the content.

Regards,
Bogdan

Juan Pablo Fernandez wrote:
> Hi all,
>
> We are having some problems with long SIP IP packets that are being fragmented.
>
> We are using TCP as transport and packets bigger than ethernet MTU (1500) are being fragmented, but the "more-fragments" bit in IP flags is not being set. This is causing the remote gateway to timeout and close TCP session.
>
> Have somebody come across this issue before? Any suggestions?
>
> Thanks
>
> Juan Pablo
>
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