[Olsr-dev] Topology inconsistency?

(spam-protected) (spam-protected)
Wed May 21 12:03:09 CEST 2008






Hi list,

on my testbench I have 3 radios running OLSR on vxWorks with the following
configuration:

Node19 <-------------> Node6 <---------------->Node12
    /\
|
     |________________?_________________|

If all nodes see each other everything works fine. But if I increase
attenuation between 19 and 6 and
between 6 and 12 so that 12 should only see 19 via hop through 6 a topology
entry 12 to 19 stays in
the topology entry list (only one direction, from node12 to node 19?).

See the JPGs (See attached file: topo_19.JPG) and (See attached file:
topo_12.JPG)

Also in debug output the topology entry stays in the list:
--- 00:00:00.61 ------------------------------------------------- TOPOLOGY

Source IP addr  Dest IP addr    LQ     ILQ    ETX
192.168.100.6   192.168.100.12   1.000  1.000  1.00
192.168.100.6   192.168.100.19   1.000  1.000  1.00
192.168.100.12  192.168.100.6    1.000  1.000  1.00
192.168.100.12  192.168.100.19   1.000  1.000  1.00
192.168.100.19  192.168.100.6    1.000  1.000  1.00
48 bytes from 192.168.100.6, socket associated tap0 really received on tap0
40 bytes from 192.168.100.6, socket associated tap0 really received on tap0
24 bytes from 192.168.100.6, socket associated tap0 really received on tap0
116 bytes from 192.168.100.6, socket associated tap0 really received on
tap0
Processing TC from 192.168.100.6, seq 0x0067
Processing TC from 192.168.100.12, seq 0x006d


Routing works fine. The kernel route 19<->12 is deleted and transmission
runs via 6 but the (wrong?) topology entry stays forever.
Did anyone discover the same problem?
If this topology entry is correct, should'nt then be an asym neighbors
entry in the olsr data structure?
I wonder wether I have a crosstalk problem on my bench?


Thomas Martin
Rohde & Schwarz GmbH & Co. KG
Postfach 801469, D-81614 M√ľnchen
Tel ++ 49 89 4129 15066
eMail: (spam-protected)
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