Для використання в віртуальних машинах у Proxmox віртуальних мережевих
інтерфейсів.
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| How SR-IOV works |
16.2. PCI Device Assignment with SR-IOV Devices Red Hat Enterprise Linux 7
Advantages of SR-IOV
SR-IOV devices can share a single physical port with multiple virtual
machines.
When an SR-IOV VF is assigned to a virtual machine, it can be
configured to (transparently to the virtual machine) place all network traffic
leaving the VF onto a particular VLAN. The virtual machine cannot detect that
its traffic is being tagged for a VLAN, and will be unable to change or
eliminate this tagging.
Virtual Functions have near-native performance
and provide better performance than paravirtualized drivers and emulated
access. Virtual Functions provide data protection between virtual machines on
the same physical server as the data is managed and controlled by the
hardware.
These features allow for increased virtual machine density on
hosts within a data center.
SR-IOV is better able to utilize the
bandwidth of devices with multiple guests.
Search SR-IOV devices
# lspci | grep Ethernet 03:00.0 Ethernet controller: Intel Corporation 82583V Gigabit Network Connection 07:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 07:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)Ethernet controller: Intel Corporation 82576 - має SR-IOV feature.
Activate Virtual Functions
Run the following command:
# echo ${num_vfs} > /sys/class/net/enp3s0f0/device/sriov_numvfs
Make the Virtual Functions persistent
To make the Virtual Functions persistent across reboots, use the editor of your choice to create an udev rule similar to the following, where you specify the intended number of VFs (in this example, 8), up to the limit supported by the network interface card. In the following example, replace enp3s0f0 with the PF network device name(s) and adjust the value of ENV{ID_NET_DRIVER} to match the driver in use:
# vim /etc/udev/rules.d/enp3s0f0.rules
ACTION=="add", SUBSYSTEM=="net", ENV{ID_NET_DRIVER}=="i40e", ATTR{device/sriov_numvfs}="8"
Virtual Functions in Proxmox
Ось приклад додавання до віртуальної машини віртуальний інтерфейс.
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Використання віртуальних мережевих інтерфейсів у VM через pass-thru
PCI |
VLAN on SR-IOV
Для визначення який vlan буде використовувати віртуальний мережевий
інтерфейес.
ip link set enp3s0f1 vf 0 vlan 200 ip link set enp3s0f1 vf 1 vlan 201 ip link set enp3s0f1 vf 2 vlan 202 ip link show enp3s0f1 4: enp3s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether XX:XX:XX:XX:XX:XX brd ff:ff:ff:ff:ff:ff
vf 0 MAC 00:00:00:00:00:00, vlan 200, spoof checking on, link-state auto, trust off
vf 1 MAC 00:00:00:00:00:00, vlan 201, spoof checking on, link-state auto, trust off
vf 2 MAC 00:00:00:00:00:00, vlan 202, spoof checking on, link-state auto, trust off
vf 3 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
vf 4 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
vf 5 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
vf 6 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
vf 7 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
VM FreeBSD
#dmesg | grep iavf iavf0: <Intel(R) Ethernet Virtual Function 700 Series> mem 0xfe400000-0xfe40ffff,0xfe414000-0xfe417fff at device 16.0 on pci0
iavf0: PF API 1.1 / VF API 1.1
iavf0: VSIs 1, QPs 4, MSI-X 5, RSS sizes: key 52 lut 64
iavf0: Using 1024 TX descriptors and 1024 RX descriptors
iavf0: Using 1 RX queues 1 TX queues
iavf0: Using MSI-X interrupts with 2 vectors
iavf0: Ethernet address: XX:XX:XX:XX:XX:XX
iavf0: netmap queues/slots: TX 1/1024, RX 1/1024
#ifconfig iavf0
iavf0: flags=8822<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=4e507bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6,NOMAP>
ether XX:XX:XX:XX:XX:XX
media: Ethernet autoselect
status: no carrier
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
....
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