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= VMware notes =
 * See [[cisco/Nexus]]
 * VMware dont need L2
   * http://blog.ioshints.info/2011/11/busting-layer-2-data-center.html
   * http://youtu.be/7TfBvGo1mCg
 * VSphere5 - 10ms max delay for migration
 * VM recovery is restart from cold, if power failure.
== Multi Interface load-balancing and fail-over ==
 * You must enable '''beacon probing''' when downstream link failures may impact availability and there is no Link State Tracking on the physical switch.
   * ESX periodically broadcast beacon packets out of all uplinks in a team. 
   * If an uplink fails to receive any beacon packets (actually missing 3 consecutive packets), we mark it bad. 
   * If a team has two uplinks, any link failure will result in all packets being sent to both uplinks.
== TLA's ==
 * Flow
   * [VM]-vNIC-on VM-FEX-10Gto-Nexus2K/5k-vEth port.
   * floating vEthernet interface - can migrate with vm
 * VM-FEX -  Cisco Virtual Machine Fabric Extender  -  on UCS system with Palo chipset in the server blades
 * VMXNET3 paravirtualized device driver 
 * VMDirectPath - Virtual and Physical Nic matches, vm can talk directly to HW.
 * vSphere 5 introduced support for vMotion with VMDirectPath for VM-FEX NICs
 *  VEM - Virtual ethernet module

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CategoryNetwork