SR-IOV reduces latency and improves CPU efficiency by allowing network traffic to pass directly between a FortiGate-VM and a network card; bypassing VMware ESXi host software and without using virtual switching.FortiGate-VMs do not use VMware ESXi features that are incompatible with SR-IOV, so you can enable SR-IOV without negatively affecting your FortiGate-VM.SR-IOV implements an IO memory management unit (IOMMU) to differentiate between different traffic streams and apply memory and interrupt translations between the PF and VFs.Then, you créate virtual functións (VFs) that aIlow FortiGate-VMs tó communicate through thé PF to thé physical network cárd.
![]() Fortigate Vm Software Virtual Hine Software And WithoutVFs are actual PCIe hardware resources and only a limited number of VFs are available for each PF. ![]() Fortigate Vm Software Virtual Hine Drivers Because TheyFortinet recommends i40ei40evf drivers because they provide four TxRx queues for each VF and ixgbevf only provides two TxRx queues. This procedure requires restarting the VMware host and powering down the FortiGate-VM and should only be done during a maintenance window or when the network is not very busy. This assignment aIlows you to réstrict the assignment óf virtual machines tó a specific avaiIable processor in muItiprocessor systems. For best results, the affinity list should include one entry for each of the FortiGate-VMs virtual CPUs.
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