[Olsr-users] Network stabilization time

[L. Aaron Kaplan]

On Apr 7, 2009, at 5:03 PM, Henning Rogge wrote:

> On Dienstag 07 April 2009 16:56:32 Juliusz Chroboczek wrote:
>>> This is interesting - so if the HelloInterval was set to 0.1 would  
>>> a new
>>> node be on-line within 400ms ?  (and the same for 0.01 / 40ms and  
>>> so on?)
>>
>> In principle.  But at that point, the ARP delay would dominate.   
>> There
>> isn't much sense in converging in less than 100ms or so.
> There is a plugin which do arp's passively for OLSR (just be  
> combining the
> incoming mac-src with the IP-src of a OLSR broadcast).

just want to add here:


--- snip ---
ultrastabil:arprefresh aaron$ more README_ARPREFRESH
---------------------------------------------------------------------
ARP REFRESH PLUGIN FOR OLSRD
by Sven-Ola Tuecke <sven-ola-aet-gmx.de>
---------------------------------------------------------------------

This plugin listens to all recevice UDP packets and maintains an
internal list of MAC addresses extracted from these. By hitchhiking
the set-route-function, the kernel ARP cache will be refreshed from
this list if a direct-neighbour host route is configured. Result:
no more ARP lookups if you use a larger routing chain - e.g. fetch
a web site 8 olsr-hops away does not show the typcial 8-nodes-need
to ARP first delay.

---------------------------------------------------------------------
PLUGIN PARAMETERS (PlParam)
---------------------------------------------------------------------

None.

---------------------------------------------------------------------
SAMPLE CONFIG
---------------------------------------------------------------------

add in /etc/olsrd.conf:

LoadPlugin "arprefresh.so.0.1"
{
}

---------------------------------------------------------------------
EOF / 2007-AUG-02