[Commotion-discuss] Olsrd setup guide?
Ben West
ben at gowasabi.net
Thu Jun 25 19:46:53 EDT 2015
Relevant OLSR documentation can be difficult to locate, since its
configuration is OS-dependent (e.g. Desktop linux vs OpenWRT). The olsrd
devs themselves tend to focus just on the tool and not the platform where
it's being deployed. My understanding is that Commotion itself will deploy
reasonable configuration to /etc/config/olsrd on its nodes, depending
gateway or repeater role.
Also, I've learned that minimal OLSR config is generally the best, leaving
default options in place wherever possible.
Here is the README about OLSR extensions, directly from olsr.org, which
tries to be OS-agnostic:
http://olsr.org/git/?p=olsrd.git;a=blob;f=README-Olsr-Extensions
Below is configuration I'm testing out on a mesh of 3 UBNT M5 nodes running
OpenWRT Chaos Calmer v46069, i.e. no Commotion or 3rd party elements. The
OLSR parameters were borrowed from Freifunk Berlin (on the assumption they
have successfully deployed such on a large scale). Also note that the
repeater nodes have configuration for non-existent "wan" interfaces, and
that the gateway node has no firewall restrictions on its (existent) wan
interface, since this is just a test mesh.
This setup works reasonably so far, with the specific exception of some
repeater nodes (but not all!) with 2 hops failing to build a functional
SmartGateway tunnel back to the gateway node, e.g. they get no route to the
outside. The reason for this exception is thus far unknown to me, despite
some hair pulling.
*Gateway node ...*
*/etc/config/wireless:*
config wifi-device radio0
option type mac80211
option channel 36
option hwmode 11a
option path 'pci0000:00/0000:00:00.0'
option htmode HT20
option 'country' 'US'
option beacon_int '1000'
option disabled 0
config wifi-iface wlan0
option device radio0
option network 'mesh'
option mode 'adhoc'
option mcast_rate '12000'
option ssid MyMeshSSID
option bssid '02:CA:FF:EE:BA:BE'
option encryption 'psk2+aes'
option key '...'
*/etc/config/network:*config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config interface 'wan'
option ifname 'eth0'
option proto 'dhcp'
config interface 'smarttun'
option ifname 'tunl0'
option proto 'none'
config 'interface' 'mesh'
option ifname 'wlan0'
option 'proto' 'static'
option 'ipaddr' '10.12.1.1'
option 'netmask' '255.255.255.0'
*/etc/config/olsrd:*config olsrd
option IpVersion '4'
option FIBMetric 'flat'
option AllowNoInt 'yes'
option TcRedundancy '2'
option NatThreshold '0.75'
option LinkQualityAlgorithm 'etx_ffeth'
option SmartGateway 'yes'
option SmartGatewayThreshold '50'
option Pollrate '0.1'
option SmartGatewayUplink 'ipv4'
config 'LoadPlugin'
option 'library' 'olsrd_arprefresh.so.0.1'
config 'LoadPlugin'
option 'library' 'olsrd_dyn_gw.so.0.5'
option 'HNA' '0.0.0.0 0.0.0.0'
option Ping '8.8.8.8'
option PingInterval '30'
option PingCmd 'ping -c 1 -q %s'
config 'LoadPlugin'
option 'library' 'olsrd_nameservice.so.0.3'
option 'sighup_pid_file' '/var/run/dnsmasq.pid'
option 'suffix' '.mesh'
config 'LoadPlugin'
option 'library' 'olsrd_txtinfo.so.0.1'
option 'port' '2006'
option 'Accept' '127.0.0.1'
config InterfaceDefaults
option MidValidityTime '500.0'
option TcInterval '2.0'
option HnaValidityTime '125.0'
option HelloValidityTime '125.0'
option TcValidityTime '500.0'
option Ip4Broadcast '255.255.255.255'
option MidInterval '25.0'
option HelloInterval '3.0'
option HnaInterval '10.0'
config 'Interface'
list 'interface' 'wan'
option 'Mode' 'ether'
config 'Interface'
list 'interface' 'mesh'
option 'Mode' 'mesh'
*/etc/config/firewall:*config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward REJECT
option disable_ipv6 1
config 'zone'
option 'name' 'mesh'
option 'network' 'mesh smarttun'
option 'input' 'ACCEPT'
option 'output' 'ACCEPT'
option 'masq' '1'
option 'forward' 'REJECT'
config zone
option name wan
option network 'wan'
option input ACCEPT
option output ACCEPT
option forward REJECT
option masq 1
option mtu_fix 1
config 'forwarding'
option 'src' 'mesh'
option 'dest' 'wan'
config 'forwarding'
option 'src' 'mesh'
option 'dest' 'mesh'
config 'forwarding'
option 'src' 'wan'
option 'dest' 'mesh'
config 'forwarding'
option 'src' 'wan'
option 'dest' 'wan'
*Repeater nodes ...*
*/etc/config/wireless: same as gateway node*
*/etc/config/network:*config interface loopback
option ifname lo
option proto static
option ipaddr 127.0.0.1
option netmask 255.0.0.0
config interface wan
option proto dhcp
option type bridge
config 'interface' 'mesh'
option ifname 'wlan0'
option 'proto' 'static'
option 'ipaddr' '10.12.1.X'
option 'netmask' '255.255.255.0'
config interface lan
option ifname eth0
option type bridge
option proto static
option 'dns' '208.67.222.222 208.67.220.220'
option ipaddr 192.168.X.1
option netmask 255.255.255.0
*/etc/config/olsrd: same as gateway node*
/etc/config/firewall:
config defaults
option syn_flood 1
option input ACCEPT
option output ACCEPT
option forward REJECT
option disable_ipv6 1
config 'zone'
option 'name' 'mesh'
option 'network' 'mesh'
option 'input' 'ACCEPT'
option 'output' 'ACCEPT'
option 'masq' '1'
option 'forward' 'REJECT'
config zone
option name lan
option network 'lan'
option input ACCEPT
option output ACCEPT
option forward REJECT
option masq 1
config zone
option name wan
option network 'wan'
option input ACCEPT
option output ACCEPT
option forward REJECT
option masq 1
config 'forwarding'
option 'src' 'wan'
option 'dest' 'mesh'
config 'forwarding'
option 'src' 'mesh'
option 'dest' 'mesh'
config 'forwarding'
option 'src' 'lan'
option 'dest' 'mesh'
config 'forwarding'
option 'src' 'mesh'
option 'dest' 'lan'
config 'forwarding'
option 'src' 'lan'
option 'dest' 'lan'
On Tue, Jun 23, 2015 at 4:21 PM, Adam Longwill <adam.longwill at metamesh.org>
wrote:
> Does anyone have a guide or even just want to explain to setting up olsrd
> in openwrt?
>
> I'm trying to improve my personal understanding of the basic configuration
> required to build an olsr mesh with OpenWRT so I can better understand
> Commotion but I am finding it difficult to learn from videos in other
> languages or high level descriptions of olsr.
>
> I am simply trying to make two routers talk to each other- one is
> connected to the Internet and the other is sitting across the room. They
> are on the same meshing wireless network but I cannot find a straight
> forward basic setup tutorial anywhere.
>
> I'm sure we could all benefit from this discussion. So how about it? How
> does one set up a basic olsr mesh network to access the Internet between
> two routers on OpenWRT?
>
> I'll be happy to share my configs and describe what I've done.
>
> Adam Longwill
>
> _______________________________________________
> Commotion-discuss mailing list
> Commotion-discuss at lists.chambana.net
> https://lists.chambana.net/mailman/listinfo/commotion-discuss
>
>
--
Ben West
http://gowasabi.net
ben at gowasabi.net
314-246-9434
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