IPv6 rip-only routing - no exchange of routes

[Goesta Smekal]

Dear list,

  looking for a small routing daemon for dynamic IPv6 routing on
embedded devices, I came across bird recently. Looks pretty much like
what I need, but I must have missed something ...

  The goal is to have two tiny routers, linked to a shared LAN segment
(at eth0 in my test). Each router advertises an IPv6 prefix to a local
network (wireless in the end, just another ethernet segment on eth1 so
far). Nodes on the separate networks should be able to talk to each
other via the two routers. And if a third router (ore some more) joins
in, the new segment(s) should automatically appear in the routers
routing tables - dynamic routing ;-)

  I compiled bird 1.3.4 from the sources on two test hosts (Debian
GNU/Linux - not the embedded stuff yet) using the commands:

root at edge01:/usr/src/bird-1.3.4# ./configure --prefix=/usr/local
--enable-ipv6 --with-protocols=static,radv,rip
root at edge01:/usr/src/bird-1.3.4# make all && make install

  My first config looked like this:

---8<---
# bird.conf
#
# dynamic routing configuration
#
# v0.1 2011-10-21 GS (goesta at smekal.at)

# global parameters

log syslog all;
debug protocols { routes, events, packets };

router id 192.168.0.34;

## routing protocols

# device parameters
protocol device {
  scan time 10;
}

# kernel routing table
protocol kernel {
  scan time 10;
  persist yes;
  learn yes;
  import all;
  export all;
}

# router advertisements
protocol radv {
  interface "eth1";
}

# dynamic routing using RIPng
protocol rip{
  authentication md5;
  password "verysecure";
  honor neighbor;
  interface "eth*";
}
---8<---

  Bird started fine on both nodes (obviously the router id was
different, but the password was the same) but the routes did not appear
on the other router. Router advertisements work fine.

  After some re-thinking and re-reading the docs I tried to add
'primary' statements to the "protocol device" section, and played with
authentication and other rip specific parameters.

  Eventually I captured RIPng (UDP port 520) packets on the network with
empty routes and after adding this:

---8<---
protocol direct{
  interface "*";
}
---8<---

  the packets contain the two prefixes, LAN and local subnet, I expect
the routers to exchange. However the routes do not show up and wireshark
mentions "Unknown address family 8193" in the packet details section of
the RIPng packets.

  Here is what syslog says:

---8<---
Oct 28 21:13:50 edge01 bird6: device1: Initializing
Oct 28 21:13:50 edge01 bird6: direct1: Initializing
Oct 28 21:13:50 edge01 bird6: kernel1: Initializing
Oct 28 21:13:50 edge01 bird6: radv1: Initializing
Oct 28 21:13:50 edge01 bird6: rip1: Initializing
Oct 28 21:13:50 edge01 bird6: device1: Starting
Oct 28 21:13:50 edge01 bird6: device1: Scanning interfaces
Oct 28 21:13:50 edge01 bird6: device1: State changed to feed
Oct 28 21:13:50 edge01 bird6: direct1: Starting
Oct 28 21:13:50 edge01 bird6: direct1: State changed to feed
Oct 28 21:13:50 edge01 bird6: kernel1: Starting
Oct 28 21:13:50 edge01 bird6: kernel1: State changed to feed
Oct 28 21:13:50 edge01 bird6: radv1: Starting
Oct 28 21:13:50 edge01 bird6: radv1: State changed to feed
Oct 28 21:13:50 edge01 bird6: rip1: Starting
Oct 28 21:13:50 edge01 bird6: rip1: Listening on (dummy), port 520, mode
broadcast (::)
Oct 28 21:13:50 edge01 bird6: rip1: State changed to feed
Oct 28 21:13:50 edge01 bird6: Started
Oct 28 21:13:50 edge01 bird6: device1: State changed to up
Oct 28 21:13:50 edge01 bird6: direct1 < primary address ::1/128 on
interface lo added
Oct 28 21:13:50 edge01 bird6: direct1 < primary address
2001:aaaa:bbbb:ccb8::/64 on interface eth0 added
Oct 28 21:13:50 edge01 bird6: direct1 > added [best]
2001:aaaa:bbbb:ccb8::/64 dev eth0
Oct 28 21:13:50 edge01 bird6: direct1 < secondary address fe80::/64 on
interface eth0 added
Oct 28 21:13:50 edge01 bird6: direct1 < primary address
2001:aaaa:bbbb:ccee::/64 on interface eth1 added
Oct 28 21:13:50 edge01 bird6: direct1 > added [best]
2001:aaaa:bbbb:ccee::/64 dev eth1
Oct 28 21:13:50 edge01 bird6: direct1 < secondary address fe80::/64 on
interface eth1 added
Oct 28 21:13:50 edge01 bird6: direct1: State changed to up
Oct 28 21:13:50 edge01 bird6: kernel1: Connected to table master
Oct 28 21:13:50 edge01 bird6: kernel1 < rejected by protocol
2001:aaaa:bbbb:ccee::/64 dev eth1
Oct 28 21:13:50 edge01 bird6: kernel1 < rejected by protocol
2001:aaaa:bbbb:ccb8::/64 dev eth0
Oct 28 21:13:50 edge01 bird6: kernel1: State changed to up
Oct 28 21:13:50 edge01 bird6: radv1 < interface lo goes up
Oct 28 21:13:50 edge01 bird6: radv1 < primary address ::1/128 on
interface lo added
Oct 28 21:13:50 edge01 bird6: radv1 < interface eth0 goes up
Oct 28 21:13:50 edge01 bird6: radv1 < primary address
2001:aaaa:bbbb:ccb8::/64 on interface eth0 added
Oct 28 21:13:50 edge01 bird6: radv1 < secondary address fe80::/64 on
interface eth0 added
Oct 28 21:13:50 edge01 bird6: radv1 < interface eth1 goes up
Oct 28 21:13:50 edge01 bird6: radv1: Adding interface eth1
Oct 28 21:13:50 edge01 bird6: radv1 < primary address
2001:aaaa:bbbb:ccee::/64 on interface eth1 added
Oct 28 21:13:50 edge01 bird6: radv1 < secondary address fe80::/64 on
interface eth1 added
Oct 28 21:13:50 edge01 bird6: radv1: State changed to up
Oct 28 21:13:50 edge01 bird6: rip1: Connected to table master
Oct 28 21:13:50 edge01 bird6: rip1 < interface lo goes up
Oct 28 21:13:50 edge01 bird6: rip1 < interface eth0 goes up
Oct 28 21:13:50 edge01 bird6: rip1 < interface eth1 goes up
Oct 28 21:13:50 edge01 bird6: rip1 < added 2001:aaaa:bbbb:ccee::/64 dev eth1
Oct 28 21:13:50 edge01 bird6: rip1 < added 2001:aaaa:bbbb:ccb8::/64 dev eth0
Oct 28 21:13:50 edge01 bird6: rip1: State changed to up
Oct 28 21:13:50 edge01 bird6: kernel1: Scanning routing table
Oct 28 21:13:50 edge01 bird6: kernel1: ::/0: [alien] created
Oct 28 21:13:50 edge01 bird6: kernel1: Pruning table master
Oct 28 21:13:50 edge01 bird6: kernel1: Pruning inherited routes
Oct 28 21:13:51 edge01 bird6: kernel1 > added [best] ::/0 via
fe80::20c:29ff:fe04:48bc on eth0
Oct 28 21:13:51 edge01 bird6: kernel1 < rejected by protocol ::/0 via
fe80::20c:29ff:fe04:48bc on eth0
Oct 28 21:13:51 edge01 bird6: rip1 < added ::/0 via
fe80::20c:29ff:fe04:48bc on eth0
Oct 28 21:13:51 edge01 bird6: rip1: Listening on eth1, port 520, mode
multicast (ff02::9)
Oct 28 21:13:51 edge01 bird6: rip1: Listening on eth0, port 520, mode
multicast (ff02::9)
Oct 28 21:13:51 edge01 bird6: radv1: Event Init on eth1
Oct 28 21:13:51 edge01 bird6: radv1: Timer fired on eth1
Oct 28 21:13:51 edge01 bird6: radv1: Sending RA via eth1
Oct 28 21:14:00 edge01 bird6: device1: Scanning interfaces
Oct 28 21:14:00 edge01 bird6: rip1: Broadcasting routing table to eth0
Oct 28 21:14:00 edge01 bird6: rip1: Broadcasting routing table to eth1
Oct 28 21:14:00 edge01 bird6: kernel1: Scanning routing table
Oct 28 21:14:00 edge01 bird6: kernel1: ::/0: [alien] seen
Oct 28 21:14:00 edge01 bird6: kernel1: Pruning table master
Oct 28 21:14:00 edge01 bird6: kernel1: Pruning inherited routes
Oct 28 21:14:06 edge01 bird6: radv1: Timer fired on eth1
Oct 28 21:14:06 edge01 bird6: radv1: Sending RA via eth1
---8<---

  This is where the startup sequence is over, the last few lines repeat
in a ten second interval (obviously, since this is configured in
protocols "device" and "kernel" ...

  The configuration now looks like this:

---8<---
# bird.conf
#
# dynamic routing configuration
#
# v0.1 2011-10-21 GS (goesta at smekal.at)

# global parameters

log syslog all;
debug protocols all;
#debug protocols { routes, events, packets };

router id 192.168.0.34;

## routing protocols

# device parameters
protocol device {
  scan time 10;
  primary "eth0" 2001:aaaa:bbbb:ccb8::1:1:1;
  primary "eth1" 2001:aaaa:bbbb:ccee::1:1:1;
}

protocol direct{
  interface "*";
}

# kernel routing table
protocol kernel {
  scan time 10;
  persist no;
  learn yes;
  import all;
  export all;
}

# router advertisements
protocol radv {
  interface "eth1";
}

#protocol static{
#  export all;
#  route 2001:aaaa:bbbb:ccee::/64 via "eth1";
#  route ::/0 via 2001:aaaa:bbbb:ccb8:20c:29ff:fe04:48bc;
#}

# dynamic routing using RIPng
protocol rip{
  authentication none;
  password "verysecure";
  honor always;
  import all;
  export all;
  interface "eth*";
}
---8<---

  As you can see, I also fiddled around with static routes, which did no
good either.

  There must be something missing somewhere, but I cannot figure it out
... Can anybody help?

  thanks in advance,

  Goesta


-- 
#!/usr/bin/perl
foreach $c (split(/ /,"47 6f 65 73 74 61 20 53 6d 65 6b 61 6c 0d 0a")) {
print pack("C", hex($c));}

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