[Bridge] br0: received packet on eth0 with own address as source address

Lentes, Bernd bernd.lentes at helmholtz-muenchen.de
Thu Aug 29 09:22:44 UTC 2013 

Hi,

i have a lot of the following messages in my /var/log/messages:

Aug  7 10:31:42 pc60181 sshd[28126]: Set /proc/self/oom_score_adj to 0
Aug  7 10:31:42 pc60181 sshd[28126]: Connection from 146.107.135.80 port 3010
Aug  7 10:31:42 pc60181 sshd[28126]: Did not receive identification string from 146.107.135.80
Aug  7 10:33:55 pc60181 sshd[28526]: Set /proc/self/oom_score_adj to 0
Aug  7 10:33:55 pc60181 sshd[28526]: Connection from 146.107.135.80 port 3253
Aug  7 10:33:55 pc60181 sshd[28526]: Did not receive identification string from 146.107.135.80
Aug  7 10:36:08 pc60181 sshd[28911]: Set /proc/self/oom_score_adj to 0
Aug  7 10:36:08 pc60181 sshd[28911]: Connection from 146.107.135.80 port 3652
Aug  7 10:36:08 pc60181 sshd[28911]: Did not receive identification string from 146.107.135.80

Aug  7 10:37:32 pc60181 kernel: [2043056.982585] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.004204] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.035225] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.061130] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.094108] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.115045] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.140435] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.160983] br0: received packet on eth0 with own address as source address
Aug  7 10:37:32 pc60181 kernel: [2043057.187529] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043061.984737] net_ratelimit: 287 callbacks suppressed
Aug  7 10:37:37 pc60181 kernel: [2043061.984741] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043061.995838] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.022750] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.040748] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.055235] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.072759] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.085984] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.100100] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.115720] br0: received packet on eth0 with own address as source address
Aug  7 10:37:37 pc60181 kernel: [2043062.128400] br0: received packet on eth0 with own address as source address
Aug  7 10:37:42 pc60181 kernel: [2043067.008973] net_ratelimit: 301 callbacks suppressed
Aug  7 10:37:42 pc60181 kernel: [2043067.008977] br0: received packet on eth0 with own address as source address
Aug  7 10:37:42 pc60181 kernel: [2043067.030616] br0: received packet on eth0 with own address as source address
Aug  7 10:37:42 pc60181 kernel: [2043067.059869] br0: received packet on eth0 with own address as source address
[...]

Messages appear for about 90 minutes and suddenly stopped.

I have the following network configuration:

pc60181:~ # ifconfig
br0       Link encap:Ethernet  HWaddr 54:04:A6:94:F4:93
          inet addr:10.35.23.36  Bcast:10.35.23.0  Mask:255.255.255.0
          inet6 addr: fe80::5604:a6ff:fe94:f493/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8087301 errors:0 dropped:196462 overruns:0 frame:0
          TX packets:1329744 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:480312835 (458.0 Mb)  TX bytes:1250573611 (1192.6 Mb)

eth0      Link encap:Ethernet  HWaddr 54:04:A6:94:F4:93
          inet6 addr: fe80::5604:a6ff:fe94:f493/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:424826060 errors:0 dropped:131484 overruns:0 frame:0
          TX packets:14092606 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:79356560631 (75680.3 Mb)  TX bytes:5338070565 (5090.7 Mb)
          Interrupt:58 Base address:0x6000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:3773045 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3773045 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3030507414 (2890.1 Mb)  TX bytes:3030507414 (2890.1 Mb)

vnet0     Link encap:Ethernet  HWaddr FE:54:00:37:92:A0
          inet6 addr: fe80::fc54:ff:fe37:92a0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:81891 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7394846 errors:0 dropped:0 overruns:6 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:7477407 (7.1 Mb)  TX bytes:536978695 (512.1 Mb)

pc60181:~ # brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.5404a694f493       no              eth0
                                                        vnet0

The bridge is used to connect a KVM VM network adapter to the one of the host.
Host is a SLES 11 SP2 64bit. Guest also.

What is the reason for this message ? I can't remember if i had a loss of connectivity for that host/vm, because i realised the message some days after the error appeared.

Any ideas ?

I have now tcpdump running to see the exact packets if the error reappears.


Bernd





--
Bernd Lentes

Systemadministration
Institut für Entwicklungsgenetik
Gebäude 35.34 - Raum 208
HelmholtzZentrum münchen
bernd.lentes at helmholtz-muenchen.de
phone: +49 89 3187 1241
fax:   +49 89 3187 2294
http://www.helmholtz-muenchen.de/idg

Wie kann man etwas beherrschen ohne zu lernen ?
Wie kann man etwas lernen ohne Fehler zu machen ?

Helmholtz Zentrum München
Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH)
Ingolstädter Landstr. 1
85764 Neuherberg
www.helmholtz-muenchen.de
Aufsichtsratsvorsitzende: MinDir´in Bärbel Brumme-Bothe
Geschäftsführer: Prof. Dr. Günther Wess Dr. Nikolaus Blum Dr. Alfons Enhsen
Registergericht: Amtsgericht München HRB 6466
USt-IdNr: DE 129521671

More information about the Bridge mailing list