Network dropout (on DHCP reallocation maybe?)..

[joncage]

I'm using the Ubuntu built v3.1 Virtual Box on Cosmic Koala Ubuntu and though it works very well most of the time, I occasionally (every 3-4 hours or maybe when the dhcp license expires - not sure of the trigger yet) get a network dropout where the guest O/S appears to forget how to network. The weird thing is that I can connect into the guest o/s using RDP fine but it doesn't appear to be able to even ping it's host.

Here's some debug from the guest system while it's working:

C:\Documents and Settings\Uber Virtual User>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : virtualuber
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . :

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter
        Physical Address. . . . . . . . . : 08-00-27-2F-D1-3C
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 10.0.2.15
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.2.2
        DHCP Server . . . . . . . . . . . : 10.0.2.2
        DNS Servers . . . . . . . . . . . : 10.0.2.2
        Lease Obtained. . . . . . . . . . : Tuesday, March 09, 2010 12:48:22 PM
        Lease Expires . . . . . . . . . . : Wednesday, March 10, 2010 12:48:22 PM

C:\Documents and Settings\Uber Virtual User>ping 10.0.2.2

Pinging 10.0.2.2 with 32 bytes of data:

Reply from 10.0.2.2: bytes=32 time=1ms TTL=127
Reply from 10.0.2.2: bytes=32 time=1ms TTL=127
Reply from 10.0.2.2: bytes=32 time=2ms TTL=127

This is it after breaking:

C:\Documents and Settings\Uber Virtual User>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : virtualuber
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . :

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter
        Physical Address. . . . . . . . . : 08-00-27-2F-D1-3C
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 10.0.2.15
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.2.2
        DHCP Server . . . . . . . . . . . : 10.0.2.2
        DNS Servers . . . . . . . . . . . : 10.0.2.2
        Lease Obtained. . . . . . . . . . : Wednesday, March 10, 2010 3:23:07 AM
        Lease Expires . . . . . . . . . . : Thursday, March 11, 2010 3:23:07 AM


C:\Documents and Settings\Uber Virtual User>ping 10.0.2.2

Pinging 10.0.2.2 with 32 bytes of data:

Request timed out.

I had a look at the guest O/S's system log and found a load of the following entries:

The name "WORKGROUP      :1d" could not be registered on the Interface with IP address 10.0.2.15.
   The machine with the IP address 10.0.2.2 did not allow the name to be claimed by this machine.

Can anyone help me debug the source of the problem or suggest a fix?

[joncage]

Virtual Box Log File

[vasily Levchenko]

Your guest is running some torrent client right? I'll try to reproduce it here?