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VLAN Tagging on SRIOV VF



I have a Dell PowerEdge R630 Server, there is  daughter card on the motherboard with quad Intel X540/I350) ethernet ports. First 2 ports are 10GB and last 2 ports are 1GB. SRIOV is supported on 10GB ports. Server is running on RHEL8.7. libvirt/KVM is used as hypervisor. Guest OS is RHEL8.7.


Problem Description: If i create a tagged VLAN interface on the VM it does not work. Does SRIOV VF interfaces support VLAN tagging with in the VM.

What am i missing? Please help.


10GB interfaces on KVM host are  showing up as eno1 and eno2. I have assigned VF eno1v0 and eno2v0 to my VM.

eno1v0 and eno2v0 are showing up as eth1 and eth2 on the VM.

On the VM I have created bond0 between eth1 and eth2 and created the VLAN interfaces on bond0.  script shown at the bottom of the this post.

Following is the setup.

  1. Global SRIOV option is enabled in the BIOS.
  2. SRIO option is enabled under BIOS device settings for both the 10GB ports .
  3. "intel_iommu=on intel_pstate=active" set in the kernel cmdline.
  4. 7 VF's are created using /etc/rc.d/rc.local
              echo '7' > /sys/class/net/eno1/device/sriov_numvfs
             echo '7' > /sys/class/net/eno2/device/sriov_numvfs
  5. The Ethernet cables connected on 10GB interfaces are configured as TRUNK on the ethernet switch side.

#lspci -vvvkmms 01:00.0

Slot: 01:00.0
Class: Ethernet controller
Vendor: Intel Corporation
Device: Ethernet Controller 10-Gigabit X540-AT2
SVendor: Dell
SDevice: Ethernet 10G 4P X540/I350 rNDC
Rev: 01
Driver: ixgbe
Module: ixgbe
NUMANode: 0
IOMMUGroup: 25


#ethtool -i eno1

driver: ixgbe
version: 4.18.0-425.3.1.el8.x86_64
firmware-version: 0x8000063c, 19.5.12
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes


#uname -a

Linux kvm2 4.18.0-425.3.1.el8.x86_64 #1 SMP Fri Sep 30 11:45:06 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux


spoof check off and trust is on
 #ip link set eno1 vf 0 spoofchk off trust on
 #ip link set eno2 vf 0 spoofchk off trust on

#ip -d link show eno1

8: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether b8:ca:3a:71:84:00 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 9710 addrgenmode none numtxqueues 64 numrxqueues 64 gso_max_size 65536 gso_max_segs 65535
vf 0 link/ether 2e:eb:55:28:3a:2d brd ff:ff:ff:ff:ff:ff, spoof checking off, link-state auto, trust on, query_rss off
vf 1 link/ether f6:fc:47:58:38:84 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off, query_rss off
vf 2 link/ether 7a:41:1d:f2:4c:6c brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off, query_rss off
vf 3 link/ether 36:af:44:7b:70:aa brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off, query_rss off
vf 4 link/ether a6:f9:92:e3:9e:02 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off, query_rss off
vf 5 link/ether da:d3:de:10:b2:5a brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off, query_rss off
vf 6 link/ether fe:60:56:c9:a1:07 brd ff:ff:ff:ff:ff:ff, spoof checking on, link-state auto, trust off, query_rss off


#virsh dumpxml vmss
<domain type='kvm' id='1'>
  <description>virtual machine for CSS</description>
    <libosinfo:libosinfo xmlns:libosinfo="">
      <libosinfo:os id=""/>
  <memory unit='KiB'>16777216</memory>
  <currentMemory unit='KiB'>16777216</currentMemory>
      <page size='1048576' unit='KiB'/>
  <vcpu placement='static'>8</vcpu>
    <vcpupin vcpu='0' cpuset='2'/>
    <vcpupin vcpu='1' cpuset='4'/>
    <vcpupin vcpu='2' cpuset='6'/>
    <vcpupin vcpu='3' cpuset='8'/>
    <vcpupin vcpu='4' cpuset='30'/>
    <vcpupin vcpu='5' cpuset='32'/>
    <vcpupin vcpu='6' cpuset='34'/>
    <vcpupin vcpu='7' cpuset='36'/>
    <memory mode='preferred' nodeset='0'/>
    <type arch='x86_64' machine='pc-q35-rhel8.6.0'>hvm</type>
    <boot dev='hd'/>
    <vmport state='off'/>
  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>Broadwell-IBRS</model>
    <topology sockets='8' dies='1' cores='1' threads='1'/>
    <feature policy='require' name='vme'/>
    <feature policy='require' name='ss'/>
    <feature policy='require' name='vmx'/>
    <feature policy='require' name='pdcm'/>
    <feature policy='require' name='f16c'/>
    <feature policy='require' name='rdrand'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='arat'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='umip'/>
    <feature policy='require' name='md-clear'/>
    <feature policy='require' name='stibp'/>
    <feature policy='require' name='arch-capabilities'/>
    <feature policy='require' name='ssbd'/>
    <feature policy='require' name='xsaveopt'/>
    <feature policy='require' name='pdpe1gb'/>
    <feature policy='require' name='abm'/>
    <feature policy='require' name='ibpb'/>
    <feature policy='require' name='ibrs'/>
    <feature policy='require' name='amd-stibp'/>
    <feature policy='require' name='amd-ssbd'/>
    <feature policy='require' name='skip-l1dfl-vmentry'/>
    <feature policy='require' name='pschange-mc-no'/>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/vmcss.qcow2' index='1'/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
    <controller type='usb' index='0' model='qemu-xhci' ports='15'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
    <controller type='sata' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    <controller type='pci' index='0' model='pcie-root'>
      <alias name='pcie.0'/>
    <controller type='pci' index='1' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='1' port='0x10'/>
      <alias name='pci.1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
    <controller type='pci' index='2' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='2' port='0x11'/>
      <alias name='pci.2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
    <controller type='pci' index='3' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='3' port='0x12'/>
      <alias name='pci.3'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
    <controller type='pci' index='4' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='4' port='0x13'/>
      <alias name='pci.4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
    <controller type='pci' index='5' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='5' port='0x14'/>
      <alias name='pci.5'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
    <controller type='pci' index='6' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='6' port='0x15'/>
      <alias name='pci.6'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
    <controller type='pci' index='7' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='7' port='0x16'/>
      <alias name='pci.7'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
    <controller type='pci' index='8' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='8' port='0x17'/>
      <alias name='pci.8'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x7'/>
    <controller type='pci' index='9' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='9' port='0x18'/>
      <alias name='pci.9'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
    <interface type='network'>
      <mac address='52:54:00:80:e1:35'/>
      <source network='default' portid='2724263e-b38d-45ab-9cfc-64a40daf5a0f' bridge='virbr0'/>
      <target dev='vnet0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    <serial type='pty'>
      <source path='/dev/pts/3'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      <alias name='serial0'/>
    <console type='pty' tty='/dev/pts/3'>
      <source path='/dev/pts/3'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-1-vmcss/org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0' state='connected'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0' state='disconnected'/>
      <alias name='channel1'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
      <address type='usb' bus='0' port='1'/>
    <input type='mouse' bus='ps2'>
      <alias name='input1'/>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    <graphics type='spice' port='5900' autoport='yes' listen=''>
      <listen type='address' address=''/>
      <image compression='off'/>
    <sound model='ich9'>
      <alias name='sound0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1b' function='0x0'/>
    <audio id='1' type='spice'/>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
        <address domain='0x0000' bus='0x01' slot='0x10' function='0x0'/>
      <alias name='hostdev0'/>
      <address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
        <address domain='0x0000' bus='0x01' slot='0x10' function='0x1'/>
      <alias name='hostdev1'/>
      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir0'/>
      <address type='usb' bus='0' port='2'/>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir1'/>
      <address type='usb' bus='0' port='3'/>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
    <rng model='virtio'>
      <backend model='random'>/dev/urandom</backend>
      <alias name='rng0'/>
      <address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
  <seclabel type='dynamic' model='dac' relabel='yes'>


Interface config on the VM

#nmcli connection add type bond ifname bond0 con-name bond0 mode active-backup miimon 100
#nmcli connection modify bond0 ipv4.method disabled
#nmcli connection modify bond0 ipv6.method ignore
#nmcli connection add type bond-slave ifname eth1 con-name eth1 master bond0
#nmcli connection add type bond-slave ifname eth2 con-name eth2 master bond0
#nmcli connection up bond0
#nmcli connection add type vlan ifname bond0.21 con-name bond0.21 id 21 dev #bond0 ip4 gw4
#nmcli connection add type vlan ifname bond0.22 con-name bond0.22 id 22 dev #bond0 ip4 gw4


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