[OLSR-users] re:Olsr Dhcp

Benjamin Henrion (spam-protected)
Fri Feb 24 13:43:40 CET 2006

Sven-Ola Tuecke <(spam-protected)> [060224]:
> Vinay, Bernd,
> ...bernd's right: I read that stuff here. Besides the technical issues, the 
> OLSR-DHCP function was meant for attracting new users for mesh networking. 
> Over time, focus has changed - so the DHCP function is a point one on my 
> to-be-removed-list. Reasons:
> - For a stable network, we need a) long time users and b) people with a 
> correct network setup and c) people using good antennas. This is generally 
> not true for a) windows whiners, b) for client-firewall-block-it-all 
> software and c) for PCMCIA card owners -> see the "how do i configure my pc 
> for IP forwarding" thread.
> - It's more easy for non-experts to simply attach a cheap access point (go 
> to the flea market and buy that stuff for $10) to the mesh device offering 
> DHCP/NAT/Easy setups in their cafe / student flat / public room for that 
> kind of function.
> - DHCP attracts the wrong folks, basically spongers.
> - Too many questions from blokes who refused to read their "Netmask and IP 
> setup basic instructions for the entry level admin" manual.
> Hence my hint: Use IPv6 to deploy autoconfig. Use fixed IP settings 
> otherwise.

Here in Brussels, we have used a DHCP server which returns the same IP
based on your mac address (like 10.xxx.yyy.zzz). It is a patched version
of udhcpd:


So you can install a DHCP server on each node, in order to do not take
care of the "Oh! but we need to allocate IPs, define IP ranges, etc...".

> LG Sven-Ola
> "Bernd Petrovitsch" <(spam-protected)> schrieb im Newsbeitrag 
> news:(spam-protected)
> >On Fri, 2006-02-24 at 17:21 +0530, Vinay Menon wrote:
> >>Thank you for the reply Bernd.
> >>
> >>Well i while i was searching for more information i found a freifunk
> >>firmware page
> >>
> >>(http://styx.commando.de/sven-ola/ffen/cgi-bin/olsrd.html) which has a
> >>term OLSR DHCP.Is that a part of olsr or would it be something that
> >>the developer might have modified in his firmware itself ?.
> >
> >Sven-Ola is reading here AFAIK so he will correct me if I'm wrong:
> >IMHO this is a special FreiFunk feature since the FreiFunk net consists
> >if several (privately sponsored) Uplinks (to ordinary ISPs) with WLAN
> >connectivity where each Uplink must masquerade the traffic to the
> >Internet and the other FreiFunk uplinks. So you have one DHCP server on
> >one WLAN antenna which gives you a private IP address for that net.
> >It simply won't work in other way well (and I don't know if they need or
> >have DHCP relayer or not).
> >
> >In Vienna the FunkFeuer net works very differently since we have public
> >IP adresses here und (most of) the nodes are directly linked via WLAN
> >connections and there is ATM one Uplink to the remaining Internet.
> >
> >>I do not have a central DHCP assigning machine.The nearest node will
> >>assign a specific range of ip address.
> >
> >If you have several independent running DHCP servers, each must handout
> >IP adresses from distinct networks (to avoid duplicates).
> >The next question is: Do you hand out public ("official") IP adresses or
> >private ones?
> >
> >But the most important feature of this answer is: I never mentioned OLSR
> >or OLSRD here up to now since we are discussing ATM how to assign IP
> >adresses to hosts (both technically and administratively).
> >And both of FreiFunk and FunkFeuer use the very same (modulo version)
> >
> >Bernd
> >-- 
> >Firmix Software GmbH                   http://www.firmix.at/
> >mobil: +43 664 4416156                 fax: +43 1 7890849-55
> >         Embedded Linux Development and Services
> >
> >
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Benjamin Henrion <(spam-protected)>
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