Multiple internal networks on Virtual box (CentOS)

Question

I have 3 NIC's (internal network) on one Virtual box Machine(CentOS 6.4) each NIC has its own network name intnet1,intnet2 and intnet3. So how I understand this is eth0 is connected to internal network 1, eth1 is connected to internal network 2 and so on. When I start up another VM(CentOS 6.4) with only one NIC connected to intnet1 I can ping all 3 NIC's on the 'server' VM but if I now change the clients internal network to intnet2 the VM cannot find the 'server' VM. Have I misunderstood how the internal network of virtual box works? Thank you in advance.

Answer 1

All that was needed was to give each network adapter its own unique netmask as it seems that when one tries to ping it tries the first adapter and if that fails does not try the other adapters since they are on the same subnet. -Credit to my friend for pointing it out

Answer 2

while configuring internal network in VirtualBox you have to make sure the below things are properly configured.

• Network name has to be same as the other machine.It must have same network name(setting--> network -->network name)
• In network adaptor settings - default gateway has to be same for both the machines.(you can verify it from ipconfig)

Turn off the windows firewall.(In order to make sure that connection is not internally blocked)

Please check whether the above are properly configured and try pinging the other server and check