[B.A.T.M.A.N.] [Battlemesh] Diversity in BATMAN

Benjamin Henrion bh at udev.org
Fri Mar 9 16:25:03 CET 2012


On Fri, Mar 9, 2012 at 3:36 PM, Marek Lindner <lindner_marek at yahoo.de> wrote:
> On Friday, March 09, 2012 22:07:37 Benjamin Henrion wrote:
>> > C=S will probably have a better TQ if it is not getting as much
>> > interference due to collisions. A will get to know about this in the
>> > path TQ. Better still, B-C will also probably have a better TQ, since
>> > the link C=S is not interfering with it. So the path TQ is even better.
>> > A gets all this.
>>
>> How do you compute the TQ?
>
> I suggest reading chapter 3.1 (specifically 3.1.3) of the excellent network
> coding paper[1] written by our catwoman specialists. It is very well written
> and contains the most comprehensive general overview about batman-adv in
> existence.

TQ is based on packet-loss only, so it is doomed to fail to detect
fast interfaces.

With such metric, you don't make any difference between a 56K
telephone line and a 10Ge NIC.

If you 10Ge has 5pc packet loss and your 56K line has 0pc, your TQ
will be prefer the 56k link.

--
Benjamin Henrion <bhenrion at ffii.org>
FFII Brussels - +32-484-566109 - +32-2-3500762
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