DPDK & SR-IOV CNI plugin
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krsacme and ahalim-intel Initalize nLink to allocate the VF
While adding test cases for config package, the new variable
nLink is left uninitialized, resulting in cni crash. Initialize
the var to the appropriate struct to allocate VF successfully.
Latest commit 8306bab Jan 21, 2019


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SR-IOV CNI plugin

This repository contains the sriov CNI plugin that allows DPDK driver binding as well as the orginal featuers of sriov-cni. To learn about CNI please visit containernetworking/cni.

NIC with SR-IOV capabilities works by introducing the idea of physical functions (PFs) and virtual functions (VFs).

PF is used by host. Each VFs can be treated as a separate physical NIC and assigned to one container, and configured with separate MAC, VLAN and IP, etc.


This plugin requires Go 1.5+ to build.

Go 1.5 users will need to set GO15VENDOREXPERIMENT=1 to get vendored dependencies. This flag is set by default in 1.6.

# make

Upon successful build the plugin binary will be available in build/sriov.

Enable SR-IOV

Given Intel ixgbe NIC on CentOS, Fedora or RHEL:

# vi /etc/modprobe.conf
options ixgbe max_vfs=8,8

Configuration reference

Main parameters

  • name (string, required): the name of the network
  • type (string, required): "sriov"
  • master (string, required): name of the PF
  • if0name (string, optional): interface name in the Container
  • l2enable (boolean, optional): if true then add VF as L2 mode only, IPAM will not be executed
  • vlan (int, optional): VLAN ID to assign for the VF
  • ipam (dictionary, optional): IPAM configuration to be used for this network.
  • dpdk (dictionary, optional): DPDK configuration

Using DPDK drivers:

If this plugin is use to bind a VF to dpdk driver then the IPAM configtuations will be ignored.

DPDK parameters

If given, The DPDK configuration expected to have the following parameters

  • kernel_driver (string, required): kernel driver name
  • dpdk_driver (string, required): DPDK capable driver name
  • dpdk_tool (string, required): path to the dpdk-devbind.py script


Configuration with IPAM:

# cat > /etc/cni/net.d/10-mynet.conf <<EOF
    "name": "mynet",
    "type": "sriov",
    "master": "enp1s0f1",
    "ipam": {
        "type": "host-local",
        "subnet": "",
        "routes": [
            { "dst": "" }
        "gateway": ""
eth0      Link encap:Ethernet  HWaddr 66:D8:02:77:AA:AA  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::64d8:2ff:fe77:aaaa/64 Scope:Link
          RX packets:7 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:530 (530.0 b)  TX bytes:988 (988.0 b)

lo        Link encap:Local Loopback  
          inet addr:  Mask:
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

Configuration with DPDK:

# cat > /etc/cni/net.d/20-mynet-dpdk.conf <<EOF
    "name": "mynet",
    "type": "sriov",
    "master": "enp1s0f1",
    "if0name": "net0",
    "dpdk": {

More info.


For any questions about Multus CNI, please reach out on github issue or feel free to contact the developers @kural OR @ahalim in our Intel-Corp Slack