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Thread: VirtualBox: ping gives "DUP!" with Bridged wifi interface

  1. #1
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    VirtualBox: ping gives "DUP!" with Bridged wifi interface

    I'm running VirtualBox 4.1.8 on Ubuntu 64-bit, which is connected to the the network via wireless adapter WLAN0.

    I'm running another Ubuntu as a VM on VirtualBox with "Bridged Adapter" via WLAN0, and it has some network problems:
    1) ping results in "(DUP!)" messages as seen below
    2) the Ubuntu guest does get a public IPv6 address from the modem, but IPv6 doesn't work

    When I switch the host system to fixed ethernet and disable wifi, the problem is gone: ping works normal, IPv6 works.

    Problem seems related to https://forums.virtualbox.org/viewtopic.php?f=7&t=45886 which has no solution.

    Any tips?


    Code:
    sander@sander-VirtualBox:~$ ping ping.xs4all.nl
    PING uucp1.xs4all.nl (194.109.21.51) 56(84) bytes of data.
    64 bytes from uucp1.xs4all.nl (194.109.21.51): icmp_req=1 ttl=59 time=22.8 ms
    64 bytes from uucp1.xs4all.nl (194.109.21.51): icmp_req=1 ttl=58 time=23.0 ms (DUP!)
    64 bytes from uucp1.xs4all.nl (194.109.21.51): icmp_req=2 ttl=59 time=20.2 ms
    64 bytes from uucp1.xs4all.nl (194.109.21.51): icmp_req=2 ttl=58 time=20.3 ms (DUP!)
    ^C
    --- uucp1.xs4all.nl ping statistics ---
    2 packets transmitted, 2 received, +2 duplicates, 0% packet loss, time 1002ms
    rtt min/avg/max/mdev = 20.254/21.612/23.022/1.342 ms
    sander@sander-VirtualBox:~$ ping 192.168.1.254
    PING 192.168.1.254 (192.168.1.254) 56(84) bytes of data.
    64 bytes from 192.168.1.254: icmp_req=1 ttl=64 time=15.9 ms
    64 bytes from 192.168.1.254: icmp_req=1 ttl=63 time=16.0 ms (DUP!)
    64 bytes from 192.168.1.254: icmp_req=2 ttl=64 time=5.10 ms
    64 bytes from 192.168.1.254: icmp_req=2 ttl=63 time=5.27 ms (DUP!)
    ^C
    --- 192.168.1.254 ping statistics ---
    2 packets transmitted, 2 received, +2 duplicates, 0% packet loss, time 1006ms
    rtt min/avg/max/mdev = 5.105/10.578/16.027/5.391 ms
    sander@sander-VirtualBox:~$

  2. #2
    Join Date
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    Re: VirtualBox: ping gives "DUP!" with Bridged wifi interface

    I have the exact same problem , the Host system is ubuntu 11.10 and the guest is ubuntu server 10.04 .!

    it was running fine before one week ago , but today I saw the error and the internet inside the VM is really slow
    Last edited by yss8166; February 26th, 2012 at 04:41 PM. Reason: font properties reset to default.

  3. #3
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    Re: VirtualBox: ping gives "DUP!" with Bridged wifi interface

    FWIW:

    The real problem for me is that IPv6 is half / not working: The guest does get an IPv6 address from the router/modem on the LAN, but IPv6 is not working. See below.


    Code:
    Stateful address conf.    :           No
    Stateful other conf.      :          Yes
    Router preference         :       medium
    Router lifetime           :         1800 (0x00000708) seconds
    Reachable time            :        30000 (0x00007530) milliseconds
    Retransmit time           :  unspecified (0x00000000)
     Prefix                   : 2a00:cd8:5288::/64
      Valid time              :      2592000 (0x00278d00) seconds
      Pref. time              :       604800 (0x00093a80) seconds
     MTU                      :         1480 bytes (valid)
     Source link-layer address: 50:67:F0:D7:69:0B
     from fe80::5267:f0ff:fed7:690b
    sander@sander-VirtualBox:~$ 
    
    
    sander@sander-VirtualBox:~$ wget www.xs4all.nl
    --2012-03-02 09:13:58--  http://www.xs4all.nl/
    Resolving www.xs4all.nl (www.xs4all.nl)... 2001:888:0:18::80, 194.109.6.92
    Connecting to www.xs4all.nl (www.xs4all.nl)|2001:888:0:18::80|:80... failed: No route to host.
    Connecting to www.xs4all.nl (www.xs4all.nl)|194.109.6.92|:80... connected.
    HTTP request sent, awaiting response... 200 OK
    Length: unspecified [text/html]
    Saving to: `index.html'
    
        [ <=>                                   ] 17,598      --.-K/s   in 0.05s   
    
    2012-03-02 09:14:06 (314 KB/s) - `index.html' saved [17598]
    
    sander@sander-VirtualBox:~$
    
    sander@sander-VirtualBox:~$ ping6 ipv6.google.com
    PING ipv6.google.com(ey-in-x69.1e100.net) 56 data bytes
    From 2a00:cd8:5288::27ff:fec4:5758 icmp_seq=1 Destination unreachable: Address unreachable
    From 2a00:cd8:5288::27ff:fec4:5758 icmp_seq=2 Destination unreachable: Address unreachable
    From 2a00:cd8:5288::27ff:fec4:5758 icmp_seq=3 Destination unreachable: Address unreachable
    ^C
    --- ipv6.google.com ping statistics ---
    5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4371ms
    
    sander@sander-VirtualBox:~$

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