[OLSR-users] Problem with droptime

Andreas T√łnnesen (spam-protected)
Tue Mar 15 13:20:00 CET 2005


Hi,

Are you saying that changing intervals has no effect on olsrd operation?
Try using HELLO intervals of 0.5 seconds(and validity time of 1.5 secs) -
is there no change in olsrd behaviour? If so I would suspect a
configuration problem. Are the changes reflected in the olsrd startup
output(emission intervals)?
BTW are you using LQ, hysteresis or neither?

- Andreas

>
> ----- Original Message -----
> From: "lolo" <(spam-protected)>
> To: "OLSR discussion and development" <(spam-protected)>
> Sent: Monday, March 14, 2005 10:56 AM
> Subject: Re: [OLSR-users] Problem with droptime
>
>
>> Hello Felix
>>
>> OLSR is not very fast at detecting/reestablishing broken roads, so maybe
>> are you hitting the limits of it ?
> 10 sec to create a new route in a very simple topology? I hope that it
> isn't
> the limit
>>
>> Maybe you could give us more information about your topology and the
>> time
>> evolution of it in order
>> to check if the timeouts fell inside "theorical" ranges
>
> Topology:
>
> There are only 3 Nodes (A, B and C). First there is a direct link from A
> to
> C
>
> A ----- C                    and everythinks goes right.
>   \       /
>    \    /
>      B
>
> After 5 seconds I change the topology (with iptables) to:
>
> A --------- B -------- C            so that there is no direct link
> between
> A and C.
>
> After 5 seconds the topology will change back. But the 5 sec are not
> enougth
> that OLSR can create a new route. So I wait for 10 to 15 sec until the new
> route
> is created. So I change in the config file the hello_interval and the
> tc_intervall but
> nothing realy happens.
>
> Felix
>
>>
>> Laurent
>>
>> Felix Nattermann wrote:
>>> Hello
>>> I've got a question. I use OLSR 0.4.8 and use it in an ethernet. I
>>> emulate a WLAN with iptables over this ethernet. Now I try to use Voice
>>> over IP over this MANET. There is one big problem. Changes in the
>>> topology of the MANET costs a lot of time until the new route is
>>> created.
>>> (Up to 15 sec.) I try to change the TC_interval and the Hello_interval,
>>> but nothing happens. All pakets are dropped until (after ca. 10 sec)
>>> the
>>> new route is set.
>>>
>>> How can I make OLSR 0.4.8 faster, so that there aren't so many
>>> paket-drops?
>>>
>>
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>
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---------
Andreas T√łnnesen
http://www.olsr.org



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