[OLSR-users] Subnetting an OLSR mesh

[Sven-Ola Tuecke]

Dan,

150 is quite ok for one mesh (see below). Do not fiddle with HNAs for that 
purpose, just use the multi-interface nodes. For backbone purposes, we have 
pointopoint-Links with a more narrow netmask here in berlin (that is 
x.0.0.0/8 for ad-hoc and x.0.0.0/30 for pointopoint). If you plan to link 
two meshes, it's a good idea to use different IPs in each. Then you can 
announce one mesh with HNA in the other (and vice versa) on the gateway.

(spam-protected):~# nvram get clkfreq
125
(spam-protected):~# route -n |wc -l
    161
(spam-protected):~# top
Mem: 9696K used, 4752K free, 0K shrd, 916K buff, 3384K cached
Load average: 0.12, 0.26, 0.26    (State: S=sleeping R=running, W=waiting)

  PID USER     STATUS   RSS  PPID %CPU %MEM COMMAND
26294 root     S        732     1 33.6  5.0 olsrd
 2703 root     R        400  2698  1.3  2.7 top
 2697 root     S        624   421  0.9  4.3 dropbear
 2698 root     S        472  2697  0.0  3.2 ash

LG Sven-Ola

""Dan"" <(spam-protected)> schrieb im Newsbeitrag 
news:(spam-protected)
> Hi All,
>
> I'm involved in the Melbourne Wireless community network, and I'm thinking
> of a way of implementing OLSR as an option for our node-owners.  We have
> about 150 active online nodes across the whole city presently - so I'm
> thinking that just creating one gigantic mesh subnet isn't going to work
> because we already have too many nodes for one mesh - and we're only going
> to get bigger, especially if OLSR proves popular.
>
> Would it be a good idea to start by establishing multiple meshes across 
> the
> city?  Each mesh would be a subnet of our 10.10.0.0/16 network.  How easy 
> is
> it to establish routing between the meshes?  Are there any other 
> advantages
> and drawbacks to this approach that I should be aware of?
>
> Can a node with a single wireless interface act as an OLSR gateway between
> two meshes?  Could it have two IP addresses - one in one mesh subnet and 
> one
> in the other?  Would HNA4 need to be manually configured in this instance 
> to
> advertise a gateway from Mesh A to Mesh B and vise versa?  I want to keep
> routing information separate between the meshes, so the nodes in each mesh
> don't have to know about the nodes in the other mesh - they just see an
> aggregated route for the other mesh.
>
> Also, do you need to manually specify HNA4 gateways if the node has two
> wireless interfaces?  One mesh might use Channel 1 and one could use 
> Channel
> 11.  If OLSR was running on this node, does the option exist to have all 
> the
> individual host routes redistributed, or aggregated as a single larger
> route?
>
> Cheers,
>
> Dan
>
> _______________________________________________
> olsr-users mailing list
> (spam-protected)
> https://www.olsr.org/mailman/listinfo/olsr-users