Virtual Box - Losing IP in bridged network

Question

I have an Ubuntu VM in which I deployed images and the rootfs for my U-Boot. In the VirtualBox (Version 5.0.2) Settings I have adjusted a Bridged Adapter. In this image you can see my set-up:

When I give the VM an IP with

sudo ifconfig eth1 192.168.99.1

I can ping the VM with U-Boot. However eth1 interface loses the IP very quickly again and I found no solutions how to prevent this.

I read that this has to do with the ARP-protocol and can't be disabled. Can you help me with possible configurations for how I can access a VM on a host from an board with U-Boot?

PS: The board and the host is only connected through a LAN cable. I read somewhere that a switch between would resolve the losing of the IP. I tried this but nothing seemed to happen.

score 0 · Accepted Answer · answered Oct 29 '15 at 13:50

I now could eventually receive an IP, which I don't lose. Everyone who has the same issue, namely losing IP after a short time in bridged network can use this solution, too [My Ubuntu is 14.04 LTS].

In the host system nothing has been changed. I still use a Bridged Adapter in Virtual Box.

1. Set up a DHCP Server*:

sudo apt-get install isc-dhcp-server

2. Edit the configuration file for the DHCP daemon: /etc/dhcp/dhcpd.conf:

cat >> /etc/dhcp/dhcpd.conf << EOF
subnet 192.168.2.0 netmask 255.255.255.0 {
        interface eth1;
        range 192.168.2.10 192.168.2.40;
        option domain-name-servers 192.168.2.1;
        option broadcast-address 192.168.2.255;
        option subnet-mask 255.255.255.0;
        option routers 192.168.2.1;
}
EOF

(The parameters can adapted on individual needs of course.)

3. Start the DHCP-Server:

sudo /etc/init.d/isc-dhcp-server start

4. Wait for your IP:

ifconfig eth1 | grep "inet addr"

There might be problems with getting an IP. Disabling the ethernet interface with the command ip link set eth0 down and rebooting and starting the DHCP-Server again might help with this problem.

Take a loo into /var/log/syslog in the case you should encounter errors:

cat /var/log/syslog

*The Guide is in German, however on the bottom of the side there are links to English sites.

Virtual Box - Losing IP in bridged network

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