We have about 250 VMs running Windows XP SP2 on one of our clusters experiencing the same issue whereby the VMs will either lose the IP address if left alone over the weekend and/or they do not renew their IP address. The only fix we have is to (a) completely power off the VM or remove/re-add the Virtual NIC. All the VMs are running the latest VMware Tools, and our network engineering people say their investigation reveals no issues with respect to the networking infrastructure. Has anyone seen this problem? It started with just a few VMs (8 to 10) but now it's becoming a more serious issue. I'm waiting to get the Event Viewer logs, but this is one error we've seen:
TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts.
I do know about the various TCPIP.SYS patches / hex editor hacks out there, but as this is a corporate cluster I'm trying to stay on the conservative side with respect to my troubleshooting approaches- for now. Any input would be greatly appreciated!