I have setup a HPC 2008 Server and can deploy compute nodes without a problem, but have one annoying problem that I cannot figure out.
I can access the Internet on the headnode without a problem, but If I try to access the Internet from a compute node, this breaks Internet connectivty on the head node. In the Network and Sharing center you can see the connection being lost as the colored Internet globe is replaced by a grey globe and there is a red x in place of the domain name. I can also see in the Manage network connections of the head node, the private NIC being disabled and then re-enabled automatically during this process which takes a few seconds to complete.
During this process, if I have IE opened on the headnode, I can no longer open any web pages, but if I close IE and I wait a few seconds before opening up a new page it will work.
During this process in IE on the compute node, I will eventually see a message at the bottom left stating a DNS error.
On the compute node, only the private LAN was active. If I also connect the Enterprise LAN the same problem exists, but if I unplug the private LAN, I can access a web page with IE without a problem, so I can see that there is something wrong with the private LAN settings but don't understand what.
Network Topology on the headnode is set to "1 Compute nodes isolated on a private network"
On the headnode the IPv4 settings are
private LAN
IP address: 10.0.0.1
Subnet mask: 255.255.0.0
Preferred DNS Server: 127.0.0.1 also tried 10.0.0.1
enterprise LAN
IP address: 172.0.1.48
Subnet mask: 255.255.0.0
Default gateway: 172.0.0.3
Preferred DNS Server: 172.0.0.1
Motherboard is a Super Micro X8DTT for headnode and compute nodes
LAN drivers used are Intel 14.0
Windows Server 2008 HPC Edition with SP1
no updates have been applied yet
I thank you in advance with any suggestions
Gilles
