[Olsr-users] Routing problem with bad ETX
Wed May 1 02:06:40 CEST 2013
I did it now ! :)
2013/4/30 Ferry Huberts <(spam-protected)>:
> On 30/04/13 18:04, Saverio Proto wrote:
>> You need to adjust your multicast rate.
>> Btw 0.6.3 olsrd is very old. Please use this feed to compile latest version:
> Saverio, can you upgrade this feed to 0.6.5.3?
>> best regards
>> Saverio Proto
>> 2013/4/30 Simon Ebnicher <(spam-protected)>:
>>> we have set up a small OLSR mesh network with three routers (TP-Link
>>> TL-WDR3600 running OpenWrt 12.09rc1, olsrd 0.6.3). We placed two routers
>>> near to each other, and the third router at quite some distance.
>>> R1 <----ETX:~1----> R2 <---------------ETX: 1.x to 2.x-----------> R3
>>> The ETX on the direct link between R1 and R3 is usually below 2 (about
>>> 1.3 to 1.7), so the direct route is preferred. However, the direct route
>>> is completely unusable for data transfer (e.g., ping reports >95% packet
>>> loss). As soon as two hop route via R2 is used, ping and other traffic
>>> works fine.
>>> We are wondering why the unreliable link is rated too optimistically. We
>>> suspect that the Hello and TC multicast packets (which are used to
>>> calculate the ETX) may have a better reception probability than unicast
>>> packets (e.g., because they are sent at lower rates, no RTS/CTS). This
>>> would lead to ETX values that do not reflect the link accurately.
>>> Can anyone confirm or explain this behaviour and maybe offer a solution?
>>> Best regards,
>>> Simon Ebnicher
>>> Olsr-users mailing list
> Ferry Huberts
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