running BABEL routing protocol on Raspberry Pi

Question

Hi, I'm facing a problem running babel on my raspberry pi model B

here are the steps which I made:

1. installation

# sudo apt-get install babeld

2. running bable deamon on wlan0

# sudo babeld wlan0

An error message appeared –> Couldn’t read forwarding knob.: No such file or directory

kernel_setup failed

I am new in linux and im trying to build up a mesh network with 4 Raspberry Pi's. Here are the Hardware details:

4 Raspberry Pi Model B running rasobian wheezy (Linux 3.18.11+ #781)

4 WiFi USB dongles TP-LINK TL-WN722N (AR9271)

ifconfig wlan0

wlan0 Link encap:Ethernet HWaddr e0:21:b7:11:5f:92

inet addr:192.168.1.21 Bcast:192.168.1.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:208 errors:0 dropped:0 overruns:0 frame:0

TX packets:1207 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:22525 (21.9 KiB) TX bytes:128407 (125.3 KiB)

I would be thankful for your support , many thanks

clem57 · Answer

This happens when babeld cannot read /proc/sys/net/ipv6/conf/all/forwarding, which specifies whether forwarding is allowed for ipv6 interfaces. In my case, this happened because the ipv6 kernel module was not loaded, so /proc/sys/net/ipv6 did not even exist. Try “modprobe ipv6″; that should fix it. But user found that: I’m sorry to waste your time i checked the source code and found the error has to do with IPv6 not enabled. I added IPv6 to “/etc/modules” and it went through fine.