[Olsr-users] OLSRD routing table problem.

[Philip Hugg]

Hello all,

I'm currently running olsrd on 3 nodes on an emulator (CoreEmu). The 
nodes are labelled as N1(10.0.0.1), N11(10.0.0.11), and N21(10.0.0.21).
When I hit the start button on the emulator, the 3 nodes virtually start 
at the same time in the order N1, N11, and N21. At this point the 3 nodes
converge to a 1-hop all informed network.

The problem I'm seeing is sometimes N21 ( and sometimes N11) has routing 
table entry that is not consistent with it's olsr neighbor table.
Below is the output from n21 after it has converged and has stabilized  
(about 5 minutes into the emulation).

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

1-[(spam-protected) n21.conf]# echo all | nc localhost 2006

2-HTTP/1.0 200 OK

3-Content-type: text/plain

4-

5-Table: Links

6-Local IPRemote IPHyst.LQNLQCost

7-10.0.0.2110.0.0.10.000.0000.000INFINITE

8-10.0.0.2110.0.0.110.000.0000.000INFINITE

9-

10- Table: Neighbors

11- IP addressSYMMPRMPRSWill.2 Hop Neighbors

12- 10.0.0.11YESNONO31

13- 10.0.0.1YESNONO31

14-

15- Table: Topology

16- Dest. IPLast hop IPLQNLQCost

17- 10.0.0.1110.0.0.10.0390.0000.000

18- 10.0.0.2110.0.0.10.0040.5250.000

19- 10.0.0.110.0.0.110.0390.0000.000

20- 10.0.0.2110.0.0.110.0040.5250.000

21- 10.0.0.110.0.0.210.0000.0000.000

22- 10.0.0.1110.0.0.210.0000.0000.000

23-

24- Table: HNA

25- DestinationGateway

26-

27- Table: MID

28- IP addressAliases

29-

30- Table: Routes

31- DestinationGateway IPMetricETXInterface

32- 10.0.0.1/3210.0.0.110.000eth0

33- 10.0.0.11/3210.0.0.120.000eth0

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

As you can see from this output, the ETX extension is not running. I 
don't need the ETX functionality since the Emulator's wireless is basic 
on/off
(ON when in-range and OFF when out-of-range). Also, I need RFC 
compliance at this time.

If you look at line 33 'Routes table', the entry indicates that 
10.0.0.11 is reachable via 10.0.0.1 with a metric of 2.
However, if you look above at the Neighbors table (lines 12 and 13). The 
neighbor 10.0.0.11 exists (line 12) and also
neighbor 10.0.0.1 is not an MPR for this node (line 13).
--->How can this be? <--

In my case, I restarted the emulation 5 times and this behaviour 
occurred 3 times. Mostly happens on N21,
and sometimes N11 and N21 are affected, however N1 is always correct.

The olsrd version is 0.6.1. The settings in olsrd.conf for the 3 nodes are:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

LinkQualityLevel0

ClearScreenyes

TcRedundancy2

InterfaceDefaults {

Ip4Broadcast255.255.255.255

}

Interface "eth0"

{

HelloInterval 2.0

HelloValidityTime6.0

TcInterval5.0

TcValidityTime15.0

}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  Your help would be greatly appreciated!

Thanks,
Phil Hugg.

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