Check your MACs. Ping fails between a VM and another Virtual Server hosthttp://blogs.technet.com/jhoward/archive/2006/06/20/check-your-macs-ping-fails-between-a-vm-and-another-virtual-server-host.aspxImagine this. Lots of machines, some virtual, some physical. Every single machine can ping every other machine, except just one pair. An administrators nightmare? Yes. Trust me, I've been there spending several hours diagnosing this particularly trickyen-GBCommunityServer 2.1 SP1 (Build: 61025.2)re: Check your MACs. Ping fails between a VM and another Virtual Server hosthttp://blogs.technet.com/jhoward/archive/2006/06/20/check-your-macs-ping-fails-between-a-vm-and-another-virtual-server-host.aspx#437950Wed, 21 Jun 2006 09:58:42 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:437950GauravI've used VMs for a lot of network testing and debugging and faced similar issues. &nbsp;Duplicate MAC addresses and stale arpcaches are the most common offenders. <br> <br>In this case i would have run a sniffer on E to make sure the packets are reaching, before figuring out whats going on. <br> <br>Good stuff ! <br>re: Check your MACs. Ping fails between a VM and another Virtual Server hosthttp://blogs.technet.com/jhoward/archive/2006/06/20/check-your-macs-ping-fails-between-a-vm-and-another-virtual-server-host.aspx#437959Wed, 21 Jun 2006 10:46:39 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:437959Andrew DugdellMy word - nice work!How to build and optimize a Virtual Machine Guesthttp://blogs.technet.com/jhoward/archive/2006/06/20/check-your-macs-ping-fails-between-a-vm-and-another-virtual-server-host.aspx#438102Thu, 22 Jun 2006 00:52:34 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:438102Dugie's PensieveLast Updated:&amp;amp;nbsp;&amp;amp;nbsp;22 June 2006 <br>This article is a guideline/reference of items to consider when...Windows 7 Release Candidate gets new featureshttp://blogs.technet.com/jhoward/archive/2006/06/20/check-your-macs-ping-fails-between-a-vm-and-another-virtual-server-host.aspx#3230760Mon, 27 Apr 2009 04:44:51 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3230760Windows 7 Release Candidate gets new features<p>Ok.. I just installed Windows 7 build 7057 onto my 17″ macbook pro (early 2009 model). I got everything running except the wifi. It seems to show a live connection available but refuses to get online. I installed all the drives from my leopard 10. 5 cd</p>