Problems with tunnel stability

[Conny]

Hallo, well I have an common USB device, which is plugged to USB0. This device has WLAN function using 802.15.4 and receives IP messages from another battery powered device. The application I use is blip from TinyOS 2.1.1. Here I use the IP-tunneling with IPv6 addresses.

The file serial_tun.conf has the following content: #Before you run the adaptation layer and router, you must #configure the address your router will advertise to the subnet, and #which network interface to proxy neighbor advertisements on.

# set the debug level of the output log INFO

#set the address of the router's 802.15.4 interface. The interface # ID must be a 16-bit short identifier addr fec0::64

#the router can proxy neighbor IPv6 neighbor discovery on another # interface so that other machines on the subnet can discover hosts # routing through this router. This specifies which interface to proxy # the NDP on. proxy lo #eth1

# which 802.15.4 channel to operate on. Valid choices are 11-26. channel 23

In my VM I activate IP-tunnel over eth1. For five minutes I am able to read incoming devices and to ping the battery powered device. Suddenly, the tunnel breaks down but seams on the other hand to be there still but unable to receive anything or to be used for pinging the battery powered device. When I restart the tunnel again, everything works fine for the next 5 minutes. The application I mentioned is blip from TinyOS 2.1.1. It run before on old VM installations fine. We did not change anything at the configuration:

Host type: MAC Mavericks/ Yosemite, Windows 7/8.1, Ubuntu Guest system in VM: Ubuntu 11.04 - natty ltest VM working was 4.3.12. Also not successfull under 4.3.16

Thus, we think there might be something cased by the new version or GuestEdition.

Thanks for help, Conny