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I'm in the process of setting up a VM environment for a MS certification exam (70-462). Following the training kit's instructions, I've set up a domain controller (DC) and two members (SQL-A, SQL-B) thus far. I can't figure out why I can't join the domain.


IPv4 Address . . . :
Subnet Mask. . . . :
DNS Servers. . . . : ::1


IPv4 Address . . . :
Subnet Mask. . . . :
DNS Servers. . . . :


IPv4 Address . . . :
Subnet Mask. . . . :
DNS Servers. . . . :

I've read how to do networking between virtual machines in virtualbox and the documentation.

After trying various network adapter configurations, I can't get them to communicate in order to have the two members join the domain.

When I ping from .30 to .10, I get:

> ping

Pinging with 32 bytes of data:
Reply from Destination host unreachable.
Reply from Destination host unreachable.
Reply from Destination host unreachable.
Reply from Destination host unreachable.

Trying to join the domain:

> netdom join SQL-A /

The specified domain either does not exist or could not be contacted.

The command failed to complete successfully.

Within VirtualBox, I've tried the following combinations for network adapter:

Attached to - Promiscuous Mode
Bridged Adapter - Deny
Bridged Adapter - Allow VMs
Bridged Adapter - Allow All
Internal Network - Deny
Internal Network - Allow VMs
Internal Network - Allow All
Host-only Adapter - Deny
Host-only Adapter - Allow VMs
Host-only Adapter - Allow All


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closed as off-topic by MDMarra, Falcon Momot, mdpc, kce, cole Oct 29 '13 at 22:40

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Use internal networking unless you need connectivity to external networks and the internet. – tombull89 Oct 28 '13 at 19:08
Are all three VMs on the same physical machine? – Max Vernon Oct 28 '13 at 19:10
@MaxVernon Indeed. – Kermit Oct 28 '13 at 19:11
What does ipconfig -all show? (on one of the VMs) – Max Vernon Oct 28 '13 at 19:12
Not necessarily constructive, but if you're on Windows 8 or 8.1 you can use client Hyper-V. It's substantially better than virtualbox for this kind of thing - especially vSwitching. – MDMarra Oct 28 '13 at 19:55