Per the title, I am experiencing a network issue while trying to connect two ESXi 4.1.0 hosts (HP ProLiant DL580 G7). Each hosts will have two network connections - one to a Cisco 3560 PoE-48 switch and another to a Cisco 2960G (different VLANs).
The problem is that both hosts are unable to maintain a consistent connection to either network. Varying switch and adapter ports, as well as speed and duplex settings have been tried, but the servers are still unable to establish and maintain a consistent connection.
A few times, the hosts would connect and we are able to configure the vSwitches and VM IP addresses, but shortly thereafter, the connections would drop and the physical adapters would appear as 'down' in the vSphere Client console.
The are also two recurring events on one host - Physical NIC vmnic5 linkstate is up/Physical NIC vmnic5 linkstate is down. (every 10 seconds)
Any advice on troubleshooting and resolving this issue would be greatly appreciated.