[Olsr-users] BMF overhead

Erik Tromp (spam-protected)
Thu Oct 11 21:46:36 CEST 2007

Yes, you're perfectly right. BMF encapsulates in UDP, and adds an 8-byte BMF
header. After that header there is the IP-header of the original packet. So
in all, 36 bytes are added.

See also chapter 10 of the README_BMF.txt file.


-----Oorspronkelijk bericht-----
Van: (spam-protected)
[mailto:(spam-protected)] Namens (spam-protected)
Verzonden: donderdag 11 oktober 2007 17:33
Aan: (spam-protected)
Onderwerp: [Olsr-users] BMF overhead

Hello all,

I have recently joined the mailing list and wish you all a good day.

I have a question regarding the BMF overhead. As per my understanding the
BMF overhead is 36 bytes i.e.
Outer IP          : 20 Bytes
UDP               : 8 Butes
BMF Encapsulation : 8 Bytes

I have simple scenario in which I am generating  multicast traffic between
the two ad hoc nodes through MGEN 4.0 and logging at the receiver end at the
same time. The task is to calculate the routing overhead due to OLSR. I
already have an idea of the OLSR control messages and just want to confirm
the BMF overhead as it encapsulates the multicast packets.

Aamir Mahmood

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