[Olsr-dev] Strange debug message from olsrd
Markus Kittenberger
(spam-protected)
Fri Oct 8 15:53:13 CEST 2010
hmm, i recommend to start debugging with tcpdump,
first try to capture incoming olsr packets with identical seqnr,.. (to
verify that the olsrd duplicate-info messages are correct)
afterwards try to find out where they come from (dump outgoing traffic on
"affected" neighbours)
and so on,..
i don`t think olsrd is really producing duplicate packets, but who knows,..
Markus
On Fri, Oct 8, 2010 at 2:44 PM, Gioacchino Mazzurco
<(spam-protected)>wrote:
> 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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