[Olsr-users] Strange ignored packets problem

[Ignacio García Pérez]

Aaron Kaplan escribió:
>
> which card / driver do you use?
Atheros, madwifi 0.9.3.1
>
>
> On Jul 20, 2007, at 8:47 AM, Ignacio García Pérez wrote:
>
>> Hi,
>>
>> I have a test setup of 7 nodes deployed in a 1 sq. km urban area.
>>
>> The net is 10.0.0.0/8, nodes are numbered 10.1.1.10, 10.1.1.20,
>> 10.1.1.30 and so on.
>>
>> The broadcast address is the olsrd default: 10.255.255.255.
>>
>>  From a node, olsrd sees HELLO/TC packets from the nodes with a good
>> connection, but seems to see NO PACKETS AT ALL from nodes to which I
>> know it has a poor (BUT USABLE) connection.
>>
>> Then, if I start tcpdump, olsrd suddenly starts seeing packets from
>> those nodes (with an expected 25% or so packet loss).
>>
>> It looks like the radio card discards those packets when it is not in
>> promiscuous mode (which is the side effect of running tcpdump AFAIK).
>>
>>
>>
>> When I change the setup to use 255.255.255.255 as broadcast address, no
>> packets are ignored.
>>
>>
>>
>> Any idea about what may be the explanation of this behaviour?
>>
>>
>>
>> Regards.
>>
>> --Olsr-users mailing list
>> (spam-protected)
>> http://lists.olsr.org/mailman/listinfo/olsr-users
>>
>
> ---
> C.O.S.H.E.R. - Completely Open Source Headers Engineering and Research
>
>
>
>