[Babel-users] babel export routes from bird to routing table?

[Christof Schulze]

Hello everyone,

This is my first post to this list. And I would be glad to receive some 
input on a problem that on first glance looks similar to 
http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/babel-users
I am hoping to use babel to distribute routes in my network and to have 
it fill a routingtable (table 10) on a gateway server. bird is handling 
the ipv6 connectivity on this server and placing all relevant routes for 
that into routing table 12. Unfortunately babel seems to ignore those 
routes.

I am currently working on a project bringing a layer 3 network with 
roaming capability to a wireless mesh network called Freifunk. Once it 
is implemented the network will consist of a 3digit number of nodes 
running babel on openwrt. Babel will distribute and optimize the routes, 
roaming will be handled by a seperate demon which places routes into 
routing table 11.

I am in an early stage of integrating the components so I figured I 
could get away with using a git snapshot from babeld for now because
* the ability to change babelds configuration during runtime, especially 
  adding and removing interfaces
* I am aware that babel 1.8 is not stable yet. As Babel 1.8 
  will be incompatible to 1.7 I do not want to integrate the old 
  version. By the time the roaming and monitoring is ready hopefully 
  babel 1.8 will be stable so it can be used in such an environment.

I am using source based policy routing "ip ru add source .. lookup table 
10" to implement routing in the network.


Root at gw01:~# ps aux |grep babel
Root       870  0.0  0.0   8560  1752 pts/0    S    22:36   0:00
/usr/local/bin/babeld -I -s /var/run/babeld.pid -G 33123 -c /tmp/babeld.conf
Root at gw01:~# cat /tmp/babeld.conf
Ipv6-subtrees true
Export-table 10
Import-table 11
Import-table 12

Interface mesh-vpn-1312
#redistribute ip 2a06:8187:fbab:2::/64 eq 128 allow
#redistribute ip 2a06:8187:fbab:1::/64 eq 128 allow
#redistribute ip 2a06:8187:fb00::/40 eq 128 allow
#redistribute local  deny
#redistribute ip ::/0 metric 256
Redistribute metric 256
Root at gw01:~# ip -6 r s t 12
2a06:8187:fb00:53::/64 via 2a06:8187:fbff:2::3 dev eth1  proto bird metric 1024
Unreachable 2a06:8187:fbab::/48 dev lo  proto bird  metric 1024  error -101
2a06:8187:fbff:3::/64 via 2a06:8187:fbff:2::1 dev eth1  proto bird metric 1024
2a06:8187:fb00::/40 via 2a06:8187:fbff:2::1 dev eth1  proto bird  metric 1024
Default via 2a06:8187:fbff:2::1 dev eth1  proto bird  metric 1024
Root at gw01:~# ip -6 r s t 11
Root at gw01:~# ip -6 r s t 10
2a06:8187:fbab:1:1aa6:f7ff:fef0:3f60 via fe80::5cc6:faff:fe81:fe77 dev mesh-vpn-1312  proto 42  metric 1024

I already did play with the proto field but then remembered to turn off 
all filtering which is also why the redistribute statements for specific 
prefixes are commented out.

So babel actually is placing a route in table 10 but not the default 
route that bird has placed in table 12. How would I achieve that?

Regards

Christof

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