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Hi Markus,<br>
<br>
thank you. I don't believe it, but it is true ;) OLSR now goes
unicast... a dream ;)<br>
Ipv4Broadcast is a misconducted name for unicasting, but it does the
job ;)<br>
Verify with tcpdump -ni vlan1 port 698 and ether host
00:12:3f:a0:f7:b6 was successful.<br>
<br>
I did not use packet aggregation. I have no option "multicast
optimization", the handbook shows such a configuration option, but
it is not available. The units have to be replaced by Ubiquity
Hardware.<br>
<br>
<pre class="moz-signature" cols="72">Liebe Grüße aus Freilassing,
Michael Rack
RSM Freilassing
--
RSM Freilassing Tel.: +49 8654 607110
Nocksteinstr. 13 Fax.: +49 8654 670438
D-83395 Freilassing <a class="moz-txt-link-abbreviated" href="http://www.rsm-freilassing.de">www.rsm-freilassing.de</a> </pre>
<br>
On 17.02.2011 20:16, Markus Kittenberger wrote:
<blockquote
cite="mid:AANLkTimsWgpMZZzYs-z71JkgrK4S7NctoPqaA0=ipEiM@mail.gmail.com"
type="cite">
<div>afair just specify an unicast adress (the ip address of the
neighbour) for Ipv4Broadcast on both sides, and it should be
unicast traffic<br>
</div>
<div><br>
</div>
<div>bust maybe its still a broadcast, using an adress that looks
like an unicast adress</div>
<div><br>
</div>
<div>(so better look at the ethernet header with tcpdump to be
sure,.. (you should see the mac of your neighbour, an no
multicast ethernet adress))</div>
<div><br>
</div>
<div>Markus</div>
<div><br>
</div>
<div>p.s. did u enable packet aggregation (or multicast
optimization) on your osbridges, if so, turn it off!</div>
<div><br>
</div>
<br>
<div class="gmail_quote">On Thu, Feb 17, 2011 at 5:52 PM, Michael
Rack <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:michael.rack@rsm-freilassing.de">michael.rack@rsm-freilassing.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div bgcolor="#FFFFFF" text="#000000"> Dear Markus and list,<br>
<br>
is there a change to get OLSR working UNICAST and not
MULTICAST in Layer 2?<br>
<br>
My Problem is not solved, my OSBRIDGE is routing MULTICAST
differently then UNICAST. OSBridge does not ACK Multicast
Packets, so that when the link becomes full,
Multicast-Traffic (LAYER2) is not reach the destination.<br>
<br>
The Setup is P2P, so UNICAST makes sense.<br>
<br>
How to get OLSR to send HELLO-Messages and all others as
UNICAST?
<div class="im"><br>
<br>
<pre cols="72">Liebe Grüße aus Freilassing,
Michael Rack
RSM Freilassing
--
RSM Freilassing Tel.: +49 8654 607110
Nocksteinstr. 13 Fax.: +49 8654 670438
D-83395 Freilassing <a moz-do-not-send="true" href="http://www.rsm-freilassing.de" target="_blank">www.rsm-freilassing.de</a> </pre>
<br>
</div>
<div>
<div class="h5"> On 23.12.2010 23:14, Markus Kittenberger
wrote:
<blockquote type="cite"><br>
<br>
<div class="gmail_quote">On Thu, Dec 23, 2010 at 9:16
PM, Michael Rack <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:michael.rack@rsm-freilassing.de"
target="_blank">michael.rack@rsm-freilassing.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><br>
> OLSR packets are sent over multicast. In
IEEE 802.11, unicast and<br>
> multicast packets use different link-layer
protocols, and it's fairly<br>
> usual to see much higher loss rates for
multicast than for unicast<br>
> packets.<br>
</div>
OLSR packets are set via broadcast, not multicast
;)<br>
multicast is a routed subnet via IGMP in range
224.0.0.0 - 239.255.255.255.<br>
</blockquote>
<div>routet or not, or which iprange, makes no
difference at layers < 3</div>
<div><br>
</div>
<div>regarding ethernet layer 2 any mac adress
having the last bit of the first byte set to 1 is
a multicast,..</div>
<div>this includes broadcasts FF:FF:FF:FF:FF:FF or
various types of multicasts,..</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"> Broadcasts
should not be dropped anyway.<br>
</blockquote>
<div>having higher loss rate, does not imply the
packets are actively dropped,..</div>
<div> </div>
<div>i think what juliusz meant was that multicasts
(including broadcasts) are not acked or
retransmitted in most IEEE 802.11 modes (e.g. WDS
links are an exception)</div>
<div>thats why multicasts are usually easier lost
than unicasts,..</div>
<div><br>
</div>
<div>but osbridges are definetely not "always" IEEE
802.11 conform,..</div>
<div>(i think you mentioned that this link is done
with osbridges,..)</div>
<div><br>
</div>
<div>(to compensate this expectable higher loss
rates) broadcasts are usually sent with another
(usually lower) bitrate:<br>
the multicastrate<br>
</div>
<div><br>
</div>
<div>which is afair "unconfigureable" on
osbridges,..</div>
<div>(but osbridge have a setting called "Multicast
Optimization", which imho is better turned off
*G,or at least try if changing it dos have effects
on your problem,..)</div>
<div><br>
</div>
<div>but osbridges are definetely not "always" IEEE
802.11 conform,..</div>
<div><br>
e.g. when used in ptp-bridge mode, they do
somewhat wdslike things (but not exactly wds)</div>
<div>(but they will handle broadcasts like unicast
in this mode afair,.. (i.e the ack anr
retransmit))</div>
<div><br>
</div>
<div>btw. i had once an rb411(bridge
mode)-osbridge(ptp-client) link having (sometimes)
unbelieveable high olsr packet loss (about 90%,
while the link itself was doing fine), imho not
explainable by lack of retransmits alone.</div>
<div><br>
</div>
<div>i temporary fixed this by tunneling the traffic
through this link (which transformed all
broadcasts to unicasts)<br>
(and later i replaced the osbridge against a
routerboard,..)</div>
<div><br>
</div>
<div> another approach would be to configure olsrd
to use unicasts instead of broadcasts *G (i.e.
ip4broadcast=neighbor_ip on both sides) (of course
this only makes sense on a ptp link!!)</div>
<div><br>
</div>
<div>but when using 2 osbridges i never had such
problems (but i don`t use them since years ago for
many other reasons,..)</div>
<div><br>
</div>
<div>Markus</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div><br>
--<br>
Olsr-users mailing list<br>
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href="mailto:Olsr-users@lists.olsr.org"
target="_blank">Olsr-users@lists.olsr.org</a><br>
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href="http://lists.olsr.org/mailman/listinfo/olsr-users"
target="_blank">http://lists.olsr.org/mailman/listinfo/olsr-users</a><br>
</div>
</div>
</blockquote>
</div>
<br>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</blockquote>
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