Tag Archives: MTU

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Back to the Future – Configure ESX 4.0 iSCSI Multipathing

Networking, VMware, , , , , , , ,

So I’m in the middle of an upgrade of environment that has;

  • 2 x Hosts on ESX 4.0
  • SAN using SAS connections to Hosts
  • No resources available for failover and testing
  • Limited network ports

I’m installing;

  • 3 x Hosts on ESXi 5.5
  • Nimble SAN – iSCSI

So to move all the virtual machines from the SAS SAN to the Nimble, I need to move the VM’s whilst turned on,

I’ve setup the iSCSI networking on the ESX host,

  • Creating VMKernal ports with IP addresses,
  • Mapping a VMNIC to each VMKernel directly
  • Setting MTU size to 9000

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JumboFrames

VMware ESXi – Test Jumbo Packets using VMKping

Networking, VMware, , , , , , ,

So first off we need to setup Jumbo frames in a few places.

  • ESXi host
  • Switch the ESXi host and Storage is plugged into
  • Storage device

As per VMware ESXi 5.0 and above, you need to also setup iSCSI Port Binding.

Ensuring its setup correctly

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