Types of VMkernel services that require the use of VMkernel port
IP storage– This is a service that is responsible for the storage of TCP/IP networks that are standard depending on the VMkernel networking that is in place. The IP storage involve storag5e types like dependent hardware iSCSI and the software iSCSI.
Management service- This service involves the configuration and the management of communications between the vCenter servers, ESXi hosts and the host-to-host traffic. This service is also responsible for providing redundancy in a given configuration.
Vmotion service- This service is responsible for enabling migration of virtual machines that are running through more than one physical server without any downtime. This service enables the automatic optimization of resources that result to maximum utilization of hardware.
Fault Tolerance Logging service- This service provides the availability of virtual machines that is continuous by creating a secondary VM that replaces the primary VM if there is any failover. This service also handles the data sent to th6e secondary VM by the primary VM over a VMkernel layer (Bill, 2012).
Five capabilities that both vSS and vDS share in common
Have uplinks- These are connections that enable the virtual switch to establish a connection to the physical networks or the outside world.
Support port groups– These are groups that have virtual ports which are configured in the same war hence similar.
Allow outbound traffic shaping- This brings the restrictions on the network bandwidth that is available on a given port.
VLAN segmentation- This is an aspect that provides organizational flexibility where the network performance is improved by dividing domains into smaller ones.
NIC teaming– involves the process where multiple network cards are combined for the purpose of redundancy and performance (Joseph, 2014).
Capabilities available on vDS only
Port Mirroring– This involves configuring the ports in a way that will allow security and diagnostic procedures to be undertaken.
Link Layer Discovery Protocol- This enables the discovery of ports from virtual to physical which can be used for documentation and troubleshooting.
VM network port block- This is a capability that allows the blocking of a port in a given network.
Per port policy- This is a capability that enables the definition of a policy at the port level and not at the group level.
Load-based teaming- This allocates for the load balancing that is best possible.
Policies available for use on vSS
Network failover detection
Bill, F. (2012). Foundation Topics | Planning and Configuring vSphere Networking | Pearson IT Certification. Retrieved from http://www.pearsonitcertification.com/articles/article.aspx?p=1929424&seqNum=2
Joseph, G. (2014). Deep Dive: Standard Virtual Switch vs Distributed Virtual Switch | Virtual Me. Retrieved from http://blog.jgriffiths.org/deep-dive-standard-virtual-switch-vs-distributed-virtual-switch/