VM network interface goes down during simulation

[tteixeira]

Hi,

My host machine is a server running Ubuntu 16.04.2 LTS (GNU/Linux 3.13.0-117-generic x86_64). I'm running VirtualBox 5.0.40_Ubuntu r115130.
I configured my virtual machines with Ubuntu 16.04 LTS, 4 GB of memory, 25+ GB of disk storage, and two network interfaces (the second one to be able to connect to the host).

I'm running NS-3 simulations on the machines, and some of them are extremely slow and the network interface goes down, so I cannot ssh to the machines. Here's an `arp -a`

Code: Select all

arp -a
? (192.168.56.101) at <incomplete> on vboxnet0
? (192.168.56.107) at 08:00:27:07:73:a7 [ether] on vboxnet0
know-rt-04-1-vl863.gw.umass.edu (128.119.86.254) at 00:d0:63:4f:58:00 [ether] on eth0
? (169.254.25.226) at ec:8e:b5:2a:d5:48 [ether] on eth0
? (192.168.56.104) at 08:00:27:87:b6:cc [ether] on vboxnet0
? (192.168.56.105) at 08:00:27:f1:31:9a [ether] on vboxnet0
? (192.168.56.102) at <incomplete> on vboxnet0
? (192.168.56.108) at <incomplete> on vboxnet0
ecs-dyn-128-119-86-227.ecs.umass.edu (128.119.86.227) at 00:0f:34:3d:99:00 [ether] on eth0
? (192.168.56.103) at 08:00:27:c7:e9:4a [ether] on vboxnet0
ecs-dyn-128-119-86-221.ecs.umass.edu (128.119.86.221) at 00:0f:34:3d:af:00 [ether] on eth0
? (192.168.56.106) at <incomplete> on vboxnet0
akasavani.ecs.umass.edu (128.119.85.84) at 00:0f:b5:c7:b9:c4 [ether] on eth0

I'm also attaching the log.

How can I solve this issue without restarting the VM (which stops my simulations)?

PS: I don't have admin privileges on the server.

Thank you

[socratis]

I'm running VirtualBox 5.0.40_Ubuntu r115130.

Try purging/deleting/killing the Ubuntu fork of VirtualBox and install the official VirtualBox version. Then we can talk about it...


PS. I saw the reference to ecs.umass.edu and I almost cried. My first NT 3.5.1 e-mail/dhcp/game/directory server was called "vaneg1.ecs.umass.edu". I setup the computer lab in the CheEng dept (che.umass.edu), about 25 years ago (about 200 of them). Cheers kiddo, have a Sam Adams on me

[tteixeira]

Awesome What a small world!
I will work on the VirtualBox version and get back to you.
Thanks