[Berlin-wireless] HowTo: highspeed 5 GHz Backbone
Sa Feb 16 12:41:15 CET 2008
In our Freifunk mesh, we changed the 5 GHz Backbone setup to 3 stand alone
performant point to point connections between good freifunk nodes, having
many 1-hop neighbors.
details of a point-to-point connection:
-> needed hardware:
-2x ASUS-WL500g Premium
-2x Atheros miniPCI (successful tested with Gigabyte 101T & Wistron
-2x 5GHz Antennas, pigtails & cables
-> needed software:
-DD-WRT v24RC6.2_atheros_wifi.bin (21.12.2007)
-settings: WDS AP mode, wlan interfaces unbridged, country settings:
Finland, outdoor channels enabled, turbo mode on, autorate on, encryption
does not work
-> reached results:
-with the countrycode set to Finland, there is a interference free
transmission in 3 outdoor channels in turbo mode possible -> good to have
some point to point connections to a good central point (a church in our
-our 3 installed outdoor links cover a distance from 100m to 500m, all
links working with 108MBit-96MBit autorate
-TCP max troughput (one way)= 7,2MByte/sek
-UDP max troughput (one way)= 7,8 MByte/sek
If you don´t care about using DD-WRT as a firmware, you will get a high
speed and reasonable point to point connection within your freifunk mesh.
Just connected the WAN Ports of the Freifunk nodes Togehther over the
bridged DD-WRT 5GHz Routers.
The bottleneck shifts to the Routing performance of the Freifunk nodes.
Because they are not able to route between WAN and LAN 7,5MByte/sek. So
about 3,5MByte/sek we achieved. We think the Broadcom switch driver from
openwrt is not that performant.Any hints ?
Have a nice weekend !
Bye Bluse @freifunk-sundhausen
Mehr Informationen über die Mailingliste Berlin