[Voyage-linux] wireless assistance needed (ad-hoc, olsr, ibss, etc...)

[Adrian Reyer]

Hi John,

On Thu, Feb 09, 2012 at 12:28:32PM -0700, John Schultz wrote:
> I am attempting to get 3 appliances to communicate with each oth and i am
> not having the best of luck. I need a Linux GOD to help me out PLEASE
> !!!!!!.

I think I have pointed out various things and not recieved feedback on
them, your last reply had been on Jan 1st.
I know voyage-linux to some extend, I know OLSR from a few years back, I
know WLAN, I know ad-hoc networks. If I am a Linux GOD in your eyes
depends on your level of knowledge.
I am even willing to help, despite I earn my living by actually charging
people for my help.
However, to be able to help, not just me, but everyone on this list
needs certain information.
- what do you want to achieve?
- what is your current setup?
- what is the actual problem?
  - is there an error message?
  - what did you do to get this error message?

Typical things that fail in mesh networks
- misunderstanding on how it works, e.g. hostap and mesh won't work
  together in most cases. hostap is infrastructure mode.
- not in ad-hoc mode
- wrong channel
- encryption will only work with wep, you can as well use unencrypted
  links, wep is broken. Use encrypted protocols instead
- bad signal strength
- mesh networks with olsr won't work with dhcp in a reasonable way,
  every node needs a fixed IP within the same broadcast domain
- ip_forwarding disabled, check /etc/sysctl.conf
    net.ipv4.ip_forward=1
  depending on your setup as well:
    net.ipv4.conf.default.rp_filter=1
    net.ipv4.conf.all.rp_filter=1
  for a quick check if it is enabled: cat /proc/sys/net/ipv4/ip_forward
  must be 1
- firewall/iptables that block the wrong traffic

Again: giving useful information about the matter helps in recieving
useful information.

Regards,
	Adrian
-- 
LiHAS - Adrian Reyer - Hessenwiesenstraße 10 - D-70565 Stuttgart
Fon: +49 (7 11) 78 28 50 90 - Fax:  +49 (7 11) 78 28 50 91
Mail: lihas at lihas.de - Web: http://lihas.de
Linux, Netzwerke, Consulting & Support - USt-ID: DE 227 816 626 Stuttgart