[Olsr-users] [Olsr-dev] Strange debug message from olsrd

Markus Kittenberger (spam-protected)
Sat Oct 9 11:56:29 CEST 2010 

even if u don`t use any wireless bridges, it seems very likely that u have
duplicate packets!!

so please try to capture & analyze your traffic to find out if u have
duplicates and where they come from,..

Markus

btw i just checked with nodes running >= 0.6.0, and did not find this
warnings. (but i do not have duplicate packets around *G)
so this messages are very likely no false positives, .. *G


On Sat, Oct 9, 2010 at 11:10 AM, Gioacchino Mazzurco
<(spam-protected)>wrote:

> no there is not bridge in our node we use pure routing
>
> 2010/10/8 h2o-post <(spam-protected)>
>
> HI all,
>>
>>
>>
>> Just out of my head I remember that weh ad the same issue in our mesh. We
>> run about 80 wireless adhoc nodes with olsr and we use 5GHz
>>
>> backbone links to connect some of those nodes on their wan port.
>>
>> While I saw the same duplicated packets, It turned out to be an issue with
>> the p2p backbone links. We are using ubiquity hardware and their
>> implementation
>>
>> of the client-bridged mode is incorrect and was the key which caused that
>> duplicated olsr packets on our side.
>>
>> After changing the p2p backbone links from AP<->Client-bridge mode to
>> AP(WDS) <-> AP(WDS) there was no duplicated packet anymore.
>>
>> It seems that in client-bridge mode the multicast packets from olsr got
>> duplicated per backbone links … so it was after 2links time 4 and so one ….
>>
>> Maybe you have a similar setup !?
>>
>>
>>
>> Bye Bluse
>>
>>
>>
>>
>>
>>
>>
>> *Von:* (spam-protected) [mailto:
>> (spam-protected)] *Im Auftrag von *Gioacchino Mazzurco
>> *Gesendet:* Freitag, 8. Oktober 2010 14:44
>> *An:* Markus Kittenberger
>> *Cc:* (spam-protected); (spam-protected);
>> (spam-protected)
>> *Betreff:* Re: [Olsr-users] [Olsr-dev] Strange debug message from olsrd
>>
>>
>>
>> mmm it seems we are not using buggy driver because our node are ubiquity
>> picostation with madwifi, moreover we have the same message from eth0 (
>> wired interface ) ... and not seems we have loop in every node... and now
>> mdns is disabled and we continue to have the same message... here is the
>> realtime topology:
>> http://131.114.250.100/status.php
>> http://131.114.250.100:2006/
>>
>> 2010/10/8 Markus Kittenberger <(spam-protected)>
>>
>> this is a warning that olsrd received the exactly same packet from one of
>> its neighbor more than once,..
>> infact olsrd received a packet with an seqnr which is identical to the
>> previous packet,..
>>
>>
>>
>> known cause for example is the buggy wireless driver of routeros (if u use
>> for example use wds links (with bad signal) between mikrotik routerboards
>> you will get duplicate packets seldomly)
>>
>> or maybe you built a layer 2 loop, or found another buggy hardware/device
>> driver,..
>>
>> mdns might also produce duplicates
>>
>>
>>
>> btw: olsrd versoins that report this, are not affected by duplicate olsr
>> packets (they ignore the duplicate), but older olsrd versions interprete a
>> duplicate packet as extreme packet loss (65535 packets lost *G) and will set
>> the links lq to 0,...
>>
>>
>>
>> as you get many erros of this type, i recommend to find out what causes
>> it, as other software may also react bad on duplicates
>>
>>
>>
>> Markus
>>
>> On Fri, Oct 8, 2010 at 10:46 AM, Gioacchino Mazzurco <
>> (spam-protected)> wrote:
>>
>> Hey all on our network in Pisa we are using olsrd from stable branch,
>> today reading the output of logread command i have found a lot of olsrd
>> related message here is a short piece:
>>
>> Jan  2 16:31:20 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32869 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (80 Bytes)
>> Jan  2 16:31:21 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54141 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (80 Bytes)
>> Jan  2 16:31:21 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10366 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (56 Bytes)
>> Jan  2 16:31:21 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57171 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (56 Bytes)
>> Jan  2 16:31:22 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32870 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (80 Bytes)
>> Jan  2 16:31:23 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54142 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (148 Bytes)
>> Jan  2 16:31:23 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10367 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (160 Bytes)
>> Jan  2 16:31:23 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57172 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (216 Bytes)
>> Jan  2 16:31:24 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32871 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (188 Bytes)
>> Jan  2 16:31:24 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54143 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (80 Bytes)
>> Jan  2 16:31:25 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57173 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (56 Bytes)
>> Jan  2 16:31:25 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10368 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (112 Bytes)
>> Jan  2 16:31:25 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32872 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (80 Bytes)
>> Jan  2 16:31:26 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54144 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (80 Bytes)
>> Jan  2 16:31:26 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57174 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (56 Bytes)
>> Jan  2 16:31:27 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10369 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (104 Bytes)
>> Jan  2 16:31:27 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32873 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (188 Bytes)
>> Jan  2 16:31:28 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54145 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (148 Bytes)
>> Jan  2 16:31:28 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57175 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (216 Bytes)
>> Jan  2 16:31:29 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10370 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (168 Bytes)
>> Jan  2 16:31:29 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32874 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (80 Bytes)
>> Jan  2 16:31:30 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54146 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (80 Bytes)
>> Jan  2 16:31:30 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57176 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (56 Bytes)
>> Jan  2 16:31:30 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32875 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (80 Bytes)
>> Jan  2 16:31:30 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10371 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (104 Bytes)
>> Jan  2 16:31:31 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 54147 from fd7d:d7bb:2c97:dec3:0:15:f2dc:faa6 on eth0 (148 Bytes)
>> Jan  2 16:31:32 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 57177 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (160 Bytes)
>> Jan  2 16:31:32 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 32876 from fd7d:d7bb:2c97:dec3:0:23:7d29:13fa on eth0 (188 Bytes)
>> Jan  2 16:31:32 OpenWrt daemon.info olsrd[705]: detected duplicate packet
>> with seqnr 10372 from fd7d:d7bb:2c97:dec3:0:15:6dfc:71ce on ath1 (168 Bytes)
>>
>> here is our topology http://131.114.250.100/status.php
>> the node is fd7d:d7bb:2c97:dec3:0:15:6dfc:720b
>>
>> but i find the same message on all node of network...
>> here is our typical configuration
>>
>>
>> DebugLevel      1
>>
>> IpVersion       6
>>
>> LoadPlugin "olsrd_txtinfo.so.0.1"
>> {
>>   PlParam     "Accept"   "0::0"
>> }
>>
>> LoadPlugin "olsrd_mdns.so.1.0.0"
>> {
>>   PlParam     "MDNS_TTL"  "10"
>>
>>   PlParam     "NonOlsrIf" "ath0"
>>   PlParam     "NonOlsrIf" "eth0"
>> }
>>
>> Hna6
>> {
>>     0::ffff:0000:0000 96
>>     0::ffff:0afe:0000 112
>>     0::ffff:0aaf:0000 120
>> }
>>
>> Interface "ath1"
>> {
>>     Mode "mesh"
>>     IPv6Multicast       FF0E::1
>>     IPv6Src             fd7d:d7bb:2c97:dec3:0000:0015:6DFC:720B
>> }
>>
>>
>> Interface "eth0"
>> {
>>     Mode "ether"
>>     IPv6Multicast       FF0E::1
>>     IPv6Src             fd7d:d7bb:2c97:dec3:0000:0015:6DFD:720B
>> }
>>
>>
>> debug level is set to 1 but forced to 0 by -d param on our custom olsrd
>> starting script
>>
>> --
>> Olsr-dev mailing list
>> (spam-protected)
>> http://lists.olsr.org/mailman/listinfo/olsr-dev
>>
>>
>>
>>
>>
>
>
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