[Olsr-users] [B.A.T.M.A.N.] point me to some OSI layer diagrams if possible ?

Marek Lindner (spam-protected)
Thu Dec 10 05:00:33 CET 2009

On Thursday 10 December 2009 07:40:53 L. Aaron Kaplan wrote:
> | link, 802.11s, B.A.T.M.A.N  layer 2 version, OLPC's  802.11s|  2    the
> | HWMP and all the 80.211s stuff resides here. 802.11a/b/g/n resides here.
> | Madwifi, ath5k and ath9k reside here. 

Sorry, but that is not (entirely) correct. It is no problem calling batman-adv 
a layer 2 protocol for the sake of simplicity (it deals with MAC addresses 
instead of IP addresses, etc ..). But if you mention batman-adv and 
802.11s/ath5k/etc in the same sentence you have to be more precise as they do 
not operate on the same layer.

batman-adv is layer 2.5 and runs on top of all ethernet based layer 2 
protocols which means you can run it over wireless 
(managed/adhoc/mesh/whatever mode), plain ethernet cable, VPNs and so on.

However, 802.11s is "true" layer 2 and as such is limited to the medium 
(wireless) as well as to the hardware & drivers. 


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