Why is my machine flooding the wireless with LLC protocol packets? [closed]

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Answer: 1

13 hours ago

Shortly after upgrading to the recent kernel 3.2.0-36-generic I started to notice that my wireless connection got seriously jammed:

  • Anything over the web (SSH, HTTP(S)) appears to be a bit slow.
  • Pinging my access point produces a rather high packet loss rate and even if there is no traffic from other machines in the network the response time ranges from 0.5ms to 300ms.
  • Quite commonly the ping says "destination host unreachable".
  • Dis- and reconnecting to the AP (WPA2-PSK) is working well, but ping is still complaining about "destination host unreachable".
  • Other machines (laptops and smartphones) show no such behavior.
  • syslog, dmesg and iw show no suspicious messages.
  • Wireshark tells me that -- among some erroneous or lost packets -- my machine is constantly sending LLC, BACnet-APDU and X.25 protocol packets to the MAC address belonging to the laptop of my wife.

You can find output of "wireshark" (48 LLC packets) here.

I have tried netstat and ntop in order to find the process responsible for sending those packets, but I was not able to do so.

Could this be my wireless driver (ath5k for Atheros Communications Inc. AR5212/AR5213 Wireless Network Adapter) or kernel running wild? Or is this simply my wireless card telling me that it is gone???

Some other details on my machine:

  • AMD Phenom 9500
  • 4GB RAM
  • NVIDIA GeForce 8600GT
  • Xubuntu 12.04 (64bit)
  • Atheros Communications Inc. AR5212/AR5213 Wireless Network Adapter
  • Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller
Added by: Madisyn Herman

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