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Re: [STDS-802-16] mesh net routing



" layer 3 routing can suffer from scalability." is too general a
statement. Layer 2 can suffer from scalability as well. All network,
especially mesh, can suffer from scalability under some scenarios.

One can use layer 3 or 2. Layer 2 can be  done with ethCS carrying
ethernet MAC address or a few other ways I can imagine depending on the
scenarios. 802.11s uses layer 2 but borrows ideas from layer 3. Layer 3
is out of scope for 16, but the 16 needs to consider supporting
mechanisms.

This discussion needs more background and assumptions. Are we talking
about the 16-2004 mesh mode, or the new MMR activity in 16j (which has
not reached the point to discuss routing yet)? arbitrary topology or
constrained, etc. etc.. 

Byoung-Jo "J" Kim
macsbug@research.att.com
AT&T Labs - Research

http://macsbug.googlepages.com/


-----Original Message-----
From: Markus Kiennen [mailto:fastjack@GMX.DE] 
Sent: Monday, October 09, 2006 3:32 PM
To: STDS-802-16@listserv.ieee.org
Subject: Re: mesh net routing

Hi,

so if I get this right, not even bridging (e.g. spanning tree) is 
possible since no destination address in whatever form is given in WiMAX

Mesh?

Markus Kiennen

ali mahmud wrote:
> Hello,
> routing solutions for mesh networks are mostly layer 3 solutions. 
> HOwever in large networks, layer 3 routing can suffer from
scalability. 
> Layer 2 is the preferred but there is no solution for it yet.
Microsoft 
> has a Mesh connectivity layer driver which works on layer 2.5 which is
a 
> kind of virtual layer between layer 2 and layer3 and their routing 
> protocol is modified form of dsr which works on multiple interfaces
and 
> has improves channel diversity. Thanks
> 
> */Markus Kiennen <fastjack@GMX.DE>/* wrote:
> 
>     Hi,
> 
>     i wonder how routing within the Mesh network is done. Is there any
>     routing on MAC layer, or only on IP layer?
> 
>     If i want to download a file from the internet, does the BS have
the
>     possibility to set destination address in the MAC Packet? (e.g.
>     destination xmt node id)?
> 
>     Best regards.
> 
>     Markus Kiennen