If you are booting into the service console for troubleshooting, a panic error might occur on ESX Server hosts with Neterion network adapters if you perform multiple boots under these circumstances:
You have modified the MTU for the network adapter several times. Modifying the MTU might also make the system unresponsive.
After modifying the network adapter's MTU, you attempt to unload the network adapter driver.
Avoid changing the MTU while using the service console to avoid the panic error. This issue is resolved in ESX Server 3.5.
Based on VMware KB 1003094