ESXi 6.0 network connectivity is lost with NETDEV WATCHDOG timeouts in the vmkernel.log

YYYY-MM-DDT21:35:34.007Z cpu0:33245)WARNING: LinNet: netdev_watchdog:3678: NETDEV WATCHDOG: vmnic0: transmit timed outYYYY-MM-DDT21:35:34.007Z cpu0:33245)WARNING: at vmkdrivers/src_92/vmklinux_92/vmware/linux_net.c:3707/netdev_watchdog() (inside vmklinux)

Ref : http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2124669

Enhanced vMotion Capability (EVC)

Enhanced vMotion Capability (EVC) is a cluster feature that enables vMotion between different processor (CPU) generations of the Intel Flex Migration or AMD-V Extended Migration technologies (Intel and AMD processors still cannot be mixed in a cluster!). vMotion requires that each processor of the ESXi hosts in a cluster can provide the same functionality. This is achieved by EVC by masking the new features of newer processors for a virtual machine. By masking these new features the same processor functional level is created across the entire cluster.
With EVC is it possible to combine different processor generations in a cluster and still make sure that virtual machines can be moved from one ESXi host to another using vMotion. EVC masks the new processor functionality for the virtual machines in the cluster. However the new processor features are not disabled.
It is understandable that EVC has impact on only the new processor features such as AMD and SSE instructions. EVC has no effect on processor speed and processor cache levels. Hardware virtualization technologies such as Intel and AMD RVI EPT will still be available for the VMkernel if EVC is enabled.

Monitoring Networked Devices with SNMP and vSphere

http://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.monitoring.doc%2FGUID-346CDDC6-8928-466F-A356-C8DAA6112439.html

Cannot access the SDK URL at https://servername/sdk

You cannot access the SDK URL at https://servername/sdk

• When you access the URL on Internet Explorer 6, the page tries to load but is unsuccessful
• When you access the URL on Internet Explorer 7, you see the error:
  
  HTTP 404 Not Found

Solution

The service athttps://localhost/sdk is not an HTML webserver that can serve web pages. The service functions over the SOAP protocol (an .xml based protocol) and only responds to SOAP requests.

 

For example a SOAP protocol request will serve https://vcenteripaddress/sdk/vimService.wsdl page where vimservice.wsdl is the name of the Web Services Description Language (WSDL) webpage file provided by VMware.

For more information about the SDK, see the VMware Infrastructure SDK Programming Guide.

Ref : http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003218