Ping Duplicates

[Michael Weller]

Hi everybody,
Why is this happening?

maw at life-ubuntu:~$ ping -c 3 web.de
PING web.de (217.72.195.42) 56(84) bytes of data.
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=1 ttl=58 time=56.6 ms
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=1 ttl=58 time=57.9 
ms (DUP!)
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=1 ttl=58 time=59.4 
ms (DUP!)
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=2 ttl=58 time=55.1 ms
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=2 ttl=58 time=55.6 
ms (DUP!)
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=2 ttl=58 time=56.6 
ms (DUP!)
64 bytes from ha-42.web.de (217.72.195.42): icmp_seq=3 ttl=58 time=56.4 ms

--- web.de ping statistics ---
3 packets transmitted, 3 received, +4 duplicates, 0% packet loss, time 
2001ms
rtt min/avg/max/mdev = 55.140/56.829/59.425/1.361 ms
maw at life-ubuntu:~$ lsmod | grep ipw2200
ipw2200               159368  0
firmware_class          9728  1 ipw2200
ieee80211              42372  1 ipw2200
ieee80211_crypt         5960  2 ipw2200,ieee80211
maw at life-ubuntu:~$ iwconfig
lo        no wireless extensions.

eth0      IEEE 802.11g  ESSID:"Knoblochnetz"
           Mode:Managed  Frequency:2.437 GHz  Access Point: 
00:04:0E:48:1B:96
           Bit Rate=11 Mb/s   Tx-Power=20 dBm
           RTS thr:off   Fragment thr:off
           Power Management:off
           Link Quality=59/100  Signal level=-65 dBm  Noise level=-83 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:3

eth1      no wireless extensions.

sit0      no wireless extensions.

maw at life-ubuntu:~$

Thanks in advance !

Michael