[Olsr-users] IEEE 802.11s

[Vinay Menon]

I was relating to the fact that switches broadcast on layer 2 unlike the
router which will broadcast to that particular subnet.
Also since on layer 2 it wont require a IP address and say a set of machines
on the same channel and same bssid cant setup a adhoc
network with one of then being the dhcp server ....this eliminates the
requirement of a master (which would have been responsible to channel and
bssid)

On Sat, May 24, 2008 at 10:59 PM, Juliusz Chroboczek <
(spam-protected)> wrote:

> > According to my understanding 802.11s is more like a switching technology
>
> I'm not sure what you mean.  Switching is not fundamentally different
> from routing, it just works at a different protocol layer.
>
> Contrary to what some people seem to believe, modern switches do use
> a proper routing protocol.  Ethernet switches (IEEE 802.1D) use the
> Spanning Tree Protocol, and Token Ring switches use a form of source
> routing with path reversal.
>
> So in some sense IEEE 802.11s is a standard for switches, except that
> it uses a much more refined routing protocol.
>
> > Since swithces broadcast they cannot be used between two different
> > network like olsr can.
>
> This is wrong.  IEEE 802.11s has provisions for integrating non-mesh
> links.  But your basic intuition is right, the mechanism is much more
> involved than the ones that can be used at layer 3.  (Basically
> 802.11s uses a degenerate form of source routing in that case.)
>
> Obviously, this will only work if the non-mesh networks use the
> IEEE 802.2 frame format (Ethernet will work, but PPP won't, at least
> not without some extra effort).
>
>                                        Juliusz
>



-- 
Vinay Menon
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