I have a Mac Pro 6.1 running OS X version 10.9.4 and have Parallels Desktop 10 fro Mac (version 10.1.1). I have installed RHEL 5.2 as a guest. I have setup the networking to be bridged mode. I am able to ping from the Mac to another node connected on the network of the interface that has been bridged. I have added the guest to the same network as the Mac. From the Mac I try to ping the guest. The only time I am successful at pinging the guest is shortly after starting the guest. I am able to get 11 - 12 successful responses before the guest becomes unreachable. To troubleshoot, I have done the following: - 1) From the guest I try to ping to another node on the network. I run tcpdump on the Mac host. I see the ARP packet from the guest to the remote node. I see the response from the remote node back to the guest. The guest does not see the response. - 2) I have created another guest (RHEL) without performing the install. I attempt to network boot the guest. I observe the guest get a dhcp lease, but it shortly is then unable to ARP the tftpserver, which is on the same node as the dhcp server. - 3) I have created another guest (Ubuntu) without performing the install. I attempt to network boot the guest. I observe the guest get a dhcp lease, but it shortly is then unable to ARP the tftpserver, which is on the same node as the dhcp server. Any suggestions for troubleshooting would be much appreciated.