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