is a computer networking device that is used to connect devices together on a computer network by performing a form of packet switching. A switch is considered more advanced than a hub because a switch will only send a message to the device that needs or requests it, rather than broadcasting the same message out of each of its ports.
The distribute switch is at the Datacenter Level
The Distribute switch acts as a single virtual switch across all associated hosts. this allows virtual machines to maintain consistent network configuration as theey migrate across the hosts
Uplink port group
connect a vsphere distributed switch to a physical NICs on associated ESX/ESXi hosts.
The number of uplinks on a vsphere distributed switch is the maximum number of allowed physical connections to the vsphere distributed switch per host.
Distributed port group
is a port group associated with a vsphere distributed switch and specifies port configuration options for each member port. Distributed port groups define how a connection is made through the vsphere distributed switch to the network.
Open Source Interconnection OSI
physical, data link, network, transport, session, presentation and application
a simple, integrated experience for managing EMC VNX Family, EMC CLARiiON, and EMC Celerra storage systems through both a storage and virtualization lens. It’s designed to provide simplicity, flexibility, and automation—key requirements for the journey to the cloud.
-high avaliability- monitoring host and virtual machine heartbeats
-Distributed Resource Scheduler-DRS functions by continually analyzing and optionally rebalancing the running x86 workloads across the VMware ESX Servers running in the cluster.
-Enhanced vmotion Compatibility EVC is a cluster setting that automatically configures all hosts in the cluster to be VMotion compatible with each other.
-swapfile vmx file
-DPM distritubed power management
Distributed Virtual switch adding port groups
static, Dynamic and ephemeral
Static – use static binding to assign a port to a virtual machine when the virtual machine connects to the distributed port group.
Dynamic - use dynamic binding to assign a port to a virtual machine the first time the virtual machine powers on after it is connected to the distributed port group. Dynamic binding is depricated in ESXi 5.0.
Ephemeral - use ephemeral for no port binding.
DVSwitch Policies 7
security, traffice shaping, vlan, team and failover, resource allocation, monitoring, miscellaneous
EMC-SP-a and b
Storage processors are the interface between the switched fabric and the disk backplanes