Hi,

Can someone help please? Pardon for not being a Linux/Unix expert, but I can surely understand some commands.

1. Earlier I've used 'GNS3-1.0-alpha3 IOU VM.ova' and 'GNS3-1.0-alpha2 IOU VM.ova' without any problems.
2. Recently downloaded and installed 'GNS3 IOU VM.ova' for 'GNS3-ER-1.0-alpha4-all-in-one'. It is under Windows 7 Enterprise SP1.
3. Installed appropriate 'iourc' licensing (hostname is 'gns3-iouvm' and hostid is: '00000000', etc.), Oracle Virtual Box extensions and VirtualBox Host-Only Ethernet Adapter.
4. Used this command - 'ifconfig' - to know what IP the 'GNS3 IOU VM.ova' has got for eth0, but the 'eth0' won't come up with an IPv4 address automatically.
5. The 'eth0' is up - but without 'inet' address. 'inet6' address is there and has these words 'UP BROADCAST RUNNING MULTICAST'
6. I tried all - from un-installing to re-installing everything, assigning IP manually, restarting network service, etc, but no matter what, the 'eth0' won't come up with an IPv4 address, like 192.168.56.101 or 192.168.56.102.

I don't know what I am missing. Can someone help please?

I solved this issue by editing, 'VirtualBox Host-Only Ethernet Adapter', which is under 'Network' tab (left side), which is invoked from 'Preferences', in 'Oracle VM VirtualBox Manager'. And then finally restarting the GNS3 IOU VM.

What did you edit in VB? All you said was you edited the Host-Only adapter.