[dpdk-dev] [PATCH v3] doc: flow bifurcation guide on Linux

Jingjing Wu jingjing.wu at intel.com
Thu Jul 14 10:04:25 CEST 2016


Flow bifurcation is a mechanism which depends the advanced
Ethernet device to split traffic between queues. It provides
the capability to let the kernel driver and DPDK driver co-exist
and take their advantages.
It is achieved by using SRIOV and NIC's advanced filtering. This
patch describes it and adds the user guide on ixgbe and i40 NICs.

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
---
v3 changes:
 - rename bifurcated driver to flow bifurcation
 - move the doc from nics to howto

This patch is based on patch set "[PATCH v3 0/2] doc: live migration procedure"
   http://www.dpdk.org/ml/archives/dev/2016-July/043476.html

 doc/guides/howto/flow_bifurcation.rst              | 288 +++++++++++
 doc/guides/howto/img/flow_bifurcation_overview.svg | 544 +++++++++++++++++++++
 doc/guides/howto/img/ixgbe_bifu_queue_idx.svg      | 101 ++++
 doc/guides/howto/index.rst                         |   1 +
 4 files changed, 934 insertions(+)
 create mode 100644 doc/guides/howto/flow_bifurcation.rst
 create mode 100644 doc/guides/howto/img/flow_bifurcation_overview.svg
 create mode 100644 doc/guides/howto/img/ixgbe_bifu_queue_idx.svg

diff --git a/doc/guides/howto/flow_bifurcation.rst b/doc/guides/howto/flow_bifurcation.rst
new file mode 100644
index 0000000..5e10952
--- /dev/null
+++ b/doc/guides/howto/flow_bifurcation.rst
@@ -0,0 +1,288 @@
+..  BSD LICENSE
+    Copyright(c) 2016 Intel Corporation. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+Flow bifurcation guide
+======================
+
+Flow bifurcation is a mechanism which depends the advanced Ethernet device to
+split traffic between Linux user space and kernel space. Because it is hardware
+assisted design, this approach can provide the line rate processing capability.
+Other than KNI, the SW is just required to device configuration, no need to
+take care of the packet movement during the traffic split. This can get more
+performance with less CPU overhead.
+
+The Flow bifurcation takes advantage of Ethernet device feature to split the
+incoming data traffic to user space application (Such as DPDK application)
+and/or kernel space program (Linux kernel stack). It can direct some traffic
+(e.g data plane traffic) to DPDK, while direct some other traffic (e.g control
+plane traffic) to the traditional Linux networking stack.
+
+There are a number of technical options to achieve this. A typical example is
+to combine the technology of SR-IOV and packet classification filtering.
+
+SR-IOV is a PCI standard that allows the same physical adapter to split as
+multiple virtual functions. Each virtual function has separated queues with
+physical function. Traffic with a virtual function's destination MAC address
+from network adapter will be directed to it. In a sense, SR-IOV has the
+capability on queue division.
+
+Packet classification filtering is the hardware capability available on most
+network adapters. Filters can be configured to direct specific flows to a given
+receive queue by hardware. Different NIC may have different filter types to
+direct flow to a Virtual Function or a queue belong to it.
+
+Linux network can receive the specific traffic through kernel driver, while
+DPDK can receive the specific traffic bypassing the Linux kernel by using
+drivers like VFIO or DPDK igb_uio module.
+
+.. _figure_flow_bifurcation_overview:
+
+.. figure:: img/flow_bifurcation_overview.*
+
+   Flow Bifucation Overview
+
+
+Use Flow bifurcation on IXGBE in Linux
+--------------------------------------
+
+On Intel 82599 10 Gigabit Ethernet Controller series NICs, Flow bifurcation
+can be achieved by SR-IOV and flow director technologies. So the traffic can
+be directed to queues by flow director capability, typically by matching 5-tuple
+of UDP/TCP packets.
+
+The step procedure is as following:
+
+#.  Boot system without iommu, or with ``iommu=pt``.
+
+#.  Create Virtual Functions:
+
+    .. code-block:: console
+
+        echo 2 > /sys/bus/pci/devices/0000:01:00.0/sriov_numvfs
+
+#.  Enable and set flow filters:
+
+    .. code-block:: console
+
+        ethtool -K eth1 ntuple on
+        ethtool -N eth1 flow-type udp4 src-ip 192.0.2.2 dst-ip 198.51.100.2 \
+		        action $queue_index_in_VF0
+        ethtool -N eth1 flow-type udp4 src-ip 198.51.100.2 dst-ip 192.0.2.2 \
+                action $queue_index_in_VF1
+
+    where:
+
+        *   $queue_index_in_PF: [queue index]
+
+        *   $queue_index_in_VFn: Bits 39:32 of the variable defines VF id + 1; lower 32 bits indicates the queue index of VF.
+
+            *   $queue_index_in_VF0 = (0x1 & 0xFF) << 32 + [queue index];
+
+            *   $queue_index_in_VF1 = (0x2 & 0xFF) << 32 + [queue index];
+
+        .. _figure_ixgbe_bifu_queue_idx:
+
+        .. figure:: img/ixgbe_bifu_queue_idx.*
+
+#.  Compile the DPDK and insert igb_uio or probe vfio-pci kernel modules as normal.
+
+#.  Bind virtual function:
+
+    .. code-block:: console
+
+        modprobe vfio-pci
+        dpdk_nic_bind.py -b vfio-pci 01:10.0
+        dpdk_nic_bind.py -b vfio-pci 01:10.1
+
+#.  run DPDK application on VFs:
+
+    .. code-block:: console
+
+        testpmd -c 0xff -n 4 -- -i -w 01:10.0 -w 01:10.1 --forward-mode=mac
+
+In this example, traffic matching the rules will go through VF by matching the
+filter rule. All other traffic which mismatching the rules, will go through
+the default queue or scaling on queues in PF. That is to say UDP packets with
+those IP source and destination addresses will go through the DPDK. All other
+traffic, with different hosts or different protocols, will go through the Linux
+networking stack.
+
+.. note::
+
+    *   The above steps work on the Linux kernel v4.2.
+
+    *   The Flow bifurcation is implemented in Linux kernel and ixgbe kernel driver by following patches:
+
+        *   `ethtool: Add helper routines to pass vf to rx_flow_spec <https://patchwork.ozlabs.org/patch/476511/>`_
+
+        *   `ixgbe: Allow flow director to use entire queue space <https://patchwork.ozlabs.org/patch/476516/>`_
+
+    *   Ethtool's version used in this example is 3.18.
+
+
+Use Flow bifurcation on I40E in Linux
+-------------------------------------
+
+On Intel X710/XL710 series Ethernet Controllers, Flow bifurcation can be achieved
+by SR-IOV , cloud filter and L3 VEB switch. So the traffic can be directed to queues by
+cloud filter and L3 VEB switch's matching rule.
+
+*   L3 VEB filter for non-tunnelled packets. It can direct a packet just by the
+    Destination IP address to a queue in a VF.
+
+*   Cloud filters for tunnelled packets have following types.
+
+    *   Inner mac
+
+    *   Inner mac + VNI
+
+    *   Outer mac + Inner mac + VNI
+
+    *   Inner mac + Inner vlan + VNI
+
+    *   Inner mac + Inner vlan
+
+The step procedure is as following:
+
+#.  Boot system without iommu, or with ``iommu=pt``.
+
+#.  Build and insert i40e.ko module.
+
+#.  Create Virtual Functions:
+
+    .. code-block:: console
+
+        echo 2 > /sys/bus/pci/devices/0000:01:00.0/sriov_numvfs
+
+#.  Add udp port offload to NIC if using cloud filter:
+
+    .. code-block:: console
+
+        ip li add vxlan0 type vxlan id 42 group 239.1.1.1 local 10.16.43.214 dev <dev_name>
+        ifconfig vxlan0 up
+        ip -d li show vxlan0
+
+    .. note::
+
+        Print ``add vxlan port 8472, index 0 success`` can be found in system log.
+
+#.  Enable and set flow filters:
+
+    *   L3 VEB filter, route whose dest IP = 192.168.50.108 to VF 0's queue 2.
+
+    .. code-block:: console
+
+        ethtool -N <dev_name> flow-type ip4 dst-ip 192.168.50.108 \
+                user-def 0xffffffff00000000 action 2 loc 8
+
+    *   Inner mac, route whose inner dest mac = 0:0:0:0:9:0 to PF's queue 6.
+
+    .. code-block:: console
+
+        ethtool -N <dev_name> flow-type ether dst 00:00:00:00:00:00 \
+                m ff:ff:ff:ff:ff:ff src 00:00:00:00:09:00 m 00:00:00:00:00:00 \
+                user-def 0xffffffff00000003 action 6 loc 1
+
+    *   Inner mac + VNI, route whose inner dest mac = 0:0:0:0:9:0 and VNI = 8 to PF's queue 4.
+
+    .. code-block:: console
+
+        ethtool -N <dev_name> flow-type ether dst 00:00:00:00:00:00 \
+                m ff:ff:ff:ff:ff:ff src 00:00:00:00:09:00 m 00:00:00:00:00:00 \
+                user-def 0x800000003 action 4 loc 4
+
+    *   Outer mac + Inner mac + VNI, route whose outer mac= 68:05:ca:24:03:8b, inner dest mac
+        = c2:1a:e1:53:bc:57, and VNI = 8 to PF's  queue 2.
+
+    .. code-block:: console
+
+        ethtool -N <dev_name> flow-type ether dst 68:05:ca:24:03:8b \
+                m 00:00:00:00:00:00 src c2:1a:e1:53:bc:57 m 00:00:00:00:00:00 \
+                user-def 0x800000003 action 2 loc 2
+
+    *   Inner mac + Inner vlan + VNI, route whose inner dest mac = 00:00:00:00:20:00,
+        inner vlan = 10, and VNI = 8 to VF 0's queue 1
+
+    .. code-block:: console
+
+        ethtool -N <dev_name> flow-type ether dst 00:00:00:00:01:00 \
+                m ff:ff:ff:ff:ff:ff src 00:00:00:00:20:00 m 00:00:00:00:00:00 \
+                vlan 10 user-def 0x800000000 action 1 loc 5
+
+    *   Inner mac + Inner vlan, route whose inner dest mac = 00:00:00:00:20:00,
+        and inner vlan = 10 to VF 0's queue 1
+
+    .. code-block:: console
+
+        ethtool -N <dev_name> flow-type ether dst 00:00:00:00:01:00 \
+                m ff:ff:ff:ff:ff:ff src 00:00:00:00:20:00 m 00:00:00:00:00:00 \
+                vlan 10 user-def 0xffffffff00000000 action 1 loc 5
+
+    .. note::
+
+        *   If the upper 32 bits of 'user-def' are 0xffffffff, then the filter can
+            be used for programming an L3 VEB filter, otherwise the upper 32 bits
+            of 'user-def' can carry the tenant ID/VNI if specified/required.
+
+        *   Cloud filters can be defined with inner mac, outer mac, inner ip, inner vlan
+            and VNI as part of the cloud tuple. It is always the Destination (not source)
+            mac/ip that these filters, filter on. For all these examples dst and src mac
+            address fields are overloaded dst == outer, src == inner.
+
+        *   Filter will be directing a packet who matching the rule to a vf id
+            specified in the lower 32 bit of user-def to queue specified by 'action'.
+
+        *   If the vf id specified by the lower 32 bit of user-def is greater than
+            or equal to max_vfs, then the filter is for the PF queues.
+
+#.  Compile the DPDK and insert igb_uio or probe vfio-pci kernel modules as normal.
+
+#.  Bind virtual function:
+
+    .. code-block:: console
+
+        modprobe vfio-pci
+        dpdk_nic_bind.py -b vfio-pci 01:10.0
+        dpdk_nic_bind.py -b vfio-pci 01:10.1
+
+#.  run DPDK application on VFs:
+
+    .. code-block:: console
+
+        testpmd -c 0xff -n 4 -- -i -w 01:10.0 -w 01:10.1 --forward-mode=mac
+
+.. note::
+
+    *   The above steps work on the i40e Linux kernel driver v1.5.16.
+
+    *   Ethtool's version used in this example is 3.18. And the mask ``ff`` means not involved, while ``00`` or don't set mask means involved.
+
+    *   For more details of the configuration, can refer to the `cloud filter test plan <http://dpdk.org/browse/tools/dts/tree/test_plans/cloud_filter_test_plan.rst>`_
diff --git a/doc/guides/howto/img/flow_bifurcation_overview.svg b/doc/guides/howto/img/flow_bifurcation_overview.svg
new file mode 100644
index 0000000..4fa2764
--- /dev/null
+++ b/doc/guides/howto/img/flow_bifurcation_overview.svg
@@ -0,0 +1,544 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Generated by Microsoft Visio, SVG Export bifurcated_driver_overview.svg Page-1 -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="6.71874in"
+   height="4.83839in"
+   viewBox="0 0 483.75 348.364"
+   xml:space="preserve"
+   color-interpolation-filters="sRGB"
+   class="st28"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="bifurcated_driver_overview.svg"><metadata
+     id="metadata240"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1600"
+     inkscape:window-height="837"
+     id="namedview238"
+     showgrid="false"
+     inkscape:zoom="1.0517845"
+     inkscape:cx="215.35622"
+     inkscape:cy="200.74714"
+     inkscape:window-x="-8"
+     inkscape:window-y="-8"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="g44" /><style
+     type="text/css"
+     id="style4"><![CDATA[
+		.st1 {visibility:visible}
+		.st2 {fill:none;filter:url(#filter_2);stroke:#5b9bd5;stroke-opacity:0.22}
+		.st3 {fill:#5b9bd5;filter:url(#filter_2);font-family:Calibri;font-size:1.16666em;font-weight:bold;opacity:0.219608}
+		.st4 {fill:none;stroke:#c7c8c8;stroke-width:0.5}
+		.st5 {fill:#000000;font-family:Calibri;font-size:1.16666em;font-weight:bold}
+		.st6 {fill:#5b9bd5;filter:url(#filter_2);font-family:Calibri;font-size:1.5em;opacity:0.219608}
+		.st7 {fill:#000000;font-family:Calibri;font-size:1.5em}
+		.st8 {fill:#a8d08d;stroke:#4f87bb;stroke-width:0.75}
+		.st9 {fill:#000000;font-family:Calibri;font-size:0.833336em}
+		.st10 {fill:#5b9bd5;fill-opacity:0.22;filter:url(#filter_2);stroke:#5b9bd5;stroke-opacity:0.22}
+		.st11 {fill:#c00000;stroke:#c7c8c8;stroke-width:0.25}
+		.st12 {fill:#feffff;font-family:Calibri;font-size:0.833336em}
+		.st13 {font-size:1em}
+		.st14 {fill:#ff0000;font-size:1em;font-weight:bold}
+		.st15 {fill:#2e75b5;stroke:#c7c8c8;stroke-width:0.25}
+		.st16 {fill:url(#grad4-50);stroke:#c7c8c8;stroke-width:0.25}
+		.st17 {fill:#feffff;font-family:Calibri;font-size:0.666664em}
+		.st18 {fill:#5b9bd5;stroke:#c7c8c8;stroke-width:0.25}
+		.st19 {fill:#000000;font-family:Calibri;font-size:1.16666em}
+		.st20 {marker-end:url(#mrkr13-84);marker-start:url(#mrkr13-82);stroke:#c00000;stroke-linecap:round;stroke-linejoin:round;stroke-width:1}
+		.st21 {fill:#c00000;fill-opacity:1;stroke:#c00000;stroke-opacity:1;stroke-width:0.28409090909091}
+		.st22 {marker-end:url(#mrkr4-90);stroke:#c00000;stroke-linecap:round;stroke-linejoin:round;stroke-width:1}
+		.st23 {marker-start:url(#mrkr13-106);stroke:#538135;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.75}
+		.st24 {fill:#538135;fill-opacity:1;stroke:#538135;stroke-opacity:1;stroke-width:0.40983606557377}
+		.st25 {marker-start:url(#mrkr13-112);stroke:#5b9bd5;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.75}
+		.st26 {fill:#5b9bd5;fill-opacity:1;stroke:#5b9bd5;stroke-opacity:1;stroke-width:0.40983606557377}
+		.st27 {fill:none;stroke:none;stroke-width:0.25}
+		.st28 {fill:none;fill-rule:evenodd;font-size:12px;overflow:visible;stroke-linecap:square;stroke-miterlimit:3}
+	]]></style><defs
+     id="Patterns_And_Gradients"><radialGradient
+       id="grad4-50"
+       cx="0.5"
+       cy="0"
+       r="1.1"><stop
+         offset="0"
+         stop-color="#a8d08d"
+         stop-opacity="1"
+         id="stop8" /><stop
+         offset="0.24"
+         stop-color="#bedcaa"
+         stop-opacity="1"
+         id="stop10" /><stop
+         offset="0.59"
+         stop-color="#3374af"
+         stop-opacity="1"
+         id="stop12" /><stop
+         offset="0.75"
+         stop-color="#41719c"
+         stop-opacity="1"
+         id="stop14" /><stop
+         offset="1"
+         stop-color="#c5e0b3"
+         stop-opacity="1"
+         id="stop16" /></radialGradient></defs><defs
+     id="Markers"><g
+       id="lend13"><path
+         d="M 3 1 L 0 0 L 3 -1 L 3 1 "
+         style="stroke:none"
+         id="path20" /></g><marker
+       id="mrkr13-82"
+       class="st21"
+       refX="10.2"
+       orient="auto"
+       markerUnits="strokeWidth"
+       overflow="visible"><use
+         xlink:href="#lend13"
+         transform="scale(3.52) "
+         id="use23" /></marker><marker
+       id="mrkr13-84"
+       class="st21"
+       refX="-10.56"
+       orient="auto"
+       markerUnits="strokeWidth"
+       overflow="visible"><use
+         xlink:href="#lend13"
+         transform="scale(-3.52,-3.52) "
+         id="use26" /></marker><g
+       id="lend4"><path
+         d="M 2 1 L 0 0 L 2 -1 L 2 1 "
+         style="stroke:none"
+         id="path29" /></g><marker
+       id="mrkr4-90"
+       class="st21"
+       refX="-7.04"
+       orient="auto"
+       markerUnits="strokeWidth"
+       overflow="visible"><use
+         xlink:href="#lend4"
+         transform="scale(-3.52,-3.52) "
+         id="use32" /></marker><marker
+       id="mrkr13-106"
+       class="st24"
+       refX="7.1142857142857"
+       orient="auto"
+       markerUnits="strokeWidth"
+       overflow="visible"><use
+         xlink:href="#lend13"
+         transform="scale(2.44) "
+         id="use35" /></marker><marker
+       id="mrkr13-112"
+       class="st26"
+       refX="7.1142857142857"
+       orient="auto"
+       markerUnits="strokeWidth"
+       overflow="visible"><use
+         xlink:href="#lend13"
+         transform="scale(2.44) "
+         id="use38" /></marker></defs><defs
+     id="Filters"><filter
+       id="filter_2"><feGaussianBlur
+         stdDeviation="2"
+         id="feGaussianBlur42" /></filter></defs><g
+     id="g44"><title
+       id="title46">Page-1</title><g
+       id="shape85-1"
+       transform="translate(133.887,-26.1478)"><title
+         id="title49">Sheet.85</title><desc
+         id="desc51">NIC</desc><g
+         id="shadow85-2"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><rect
+           x="0"
+           y="255.497"
+           width="346.142"
+           height="92.8673"
+           class="st2"
+           id="rect54" /><text
+           x="162.89"
+           y="349.33"
+           class="st3"
+           id="text56">NIC</text>
+</g><rect
+         x="0"
+         y="255.497"
+         width="346.142"
+         height="92.8673"
+         class="st4"
+         id="rect58"
+         style="stroke-width:0.50000076;stroke-miterlimit:3;stroke-dasharray:none" /><text
+         x="162.89"
+         y="349.33"
+         class="st5"
+         id="text60">NIC</text>
+</g><g
+       id="shape20-9"
+       transform="translate(3.0289,-127.458)"><title
+         id="title63">Rounded Rectangle.20</title><desc
+         id="desc65">LINUX</desc><g
+         id="shadow20-10"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><path
+           d="M30.39 348.36 L273.54 348.36 A30.3924 30.3924 -180 0 0 303.93 317.97 L303.93 235.23 A30.3924 30.3924 -180         0 0 273.54 204.84 L30.39 204.84 A30.3924 30.3924 -180 0 0 0 235.23 L0 317.97 A30.3924 30.3924 -180 0         0 30.39 348.36 Z"
+           class="st2"
+           id="path68" /><text
+           x="255.32"
+           y="238.8"
+           class="st6"
+           id="text70">LINUX</text>
+</g><path
+         d="M30.39 348.36 L273.54 348.36 A30.3924 30.3924 -180 0 0 303.93 317.97 L303.93 235.23 A30.3924 30.3924 -180 0        0 273.54 204.84 L30.39 204.84 A30.3924 30.3924 -180 0 0 0 235.23 L0 317.97 A30.3924 30.3924 -180 0 0 30.39        348.36 Z"
+         class="st4"
+         id="path72" /><text
+         x="255.32"
+         y="238.8"
+         class="st7"
+         id="text74">LINUX</text>
+</g><g
+       id="shape8-17"
+       transform="translate(95.8962,-140.079)"><title
+         id="title77">Rounded Rectangle.8</title><desc
+         id="desc79">Kernel pf driver</desc><path
+         d="M18.57 348.36 L167.16 348.36 A18.5731 18.5731 -180 0 0 185.73 329.79 L185.73 303.58 A18.5731 18.5731 -180 0        0 167.16 285 L18.57 285 A18.5731 18.5731 -180 0 0 0 303.58 L0 329.79 A18.5731 18.5731 -180 0 0 18.57 348.36        Z"
+         class="st8"
+         id="path81" /><text
+         x="118.71"
+         y="319.68"
+         class="st9"
+         id="text83">Kernel pf driver  </text>
+</g><g
+       id="shape1-20"
+       transform="translate(103.263,-156.88)"><title
+         id="title86">Rounded Rectangle</title><desc
+         id="desc88">Filters support traffic steering to VF</desc><g
+         id="shadow1-21"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><path
+           d="M10.55 348.36 L94.98 348.36 A10.5529 10.5529 -180 0 0 105.53 337.81 L105.53 324.98 A10.5529 10.5529 -180         0 0 94.98 314.43 L10.55 314.43 A10.5529 10.5529 -180 0 0 0 324.98 L0 337.81 A10.5529 10.5529 -180 0         0 10.55 348.36 Z"
+           class="st10"
+           id="path91" /></g><path
+         d="M10.55 348.36 L94.98 348.36 A10.5529 10.5529 -180 0 0 105.53 337.81 L105.53 324.98 A10.5529 10.5529 -180 0 0        94.98 314.43 L10.55 314.43 A10.5529 10.5529 -180 0 0 0 324.98 L0 337.81 A10.5529 10.5529 -180 0 0 10.55        348.36 Z"
+         class="st11"
+         id="path93" /><text
+         x="10.03"
+         y="328.39"
+         class="st12"
+         id="text95"
+         style="-inkscape-font-specification:'Calibri, Normal';font-family:Calibri;font-weight:normal;font-style:normal;font-stretch:normal;font-variant:normal;font-size:10.00001526px;text-anchor:start;text-align:start;writing-mode:lr;line-height:125%;"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4475">Filters support traffic</tspan></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#feffff"
+         x="11.048484"
+         y="340.46152"
+         class="st12"
+         id="text95-1"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4477"
+           x="11.048484"
+           y="340.46152">steering to VF</tspan></text>
+</g><g
+       id="shape3-27"
+       transform="translate(192.985,-73.088)"><title
+         id="title100">Rectangle.3</title><desc
+         id="desc102">Rx Queues (0-N) PF</desc><rect
+         x="0"
+         y="314.425"
+         width="75.9823"
+         height="33.9388"
+         class="st8"
+         id="rect104" /><text
+         x="16.43"
+         y="322.39"
+         class="st9"
+         id="text106"
+         style="-inkscape-font-specification:'Calibri, Normal';font-family:Calibri;font-weight:normal;font-style:normal;font-stretch:normal;font-variant:normal;font-size:10.00001526px;text-anchor:start;text-align:start;writing-mode:lr;line-height:125%;"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4512">Rx Queues</tspan></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#000000"
+         x="23.187859"
+         y="333.70471"
+         class="st9"
+         id="text106-2"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4514"
+           x="23.187859"
+           y="333.70471">( 0-N )</tspan></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#ff0000;fill-opacity:1"
+         x="27.490538"
+         y="345.52356"
+         class="st9"
+         id="text106-9"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4516"
+           x="27.490538"
+           y="345.52356"> PF</tspan></text>
+</g><g
+       id="shape4-32"
+       transform="translate(344.949,-73.088)"><title
+         id="title113">Rectangle.4</title><desc
+         id="desc115">Rx Queues (0-M) VF(vf 0)</desc><g
+         id="shadow4-33"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><rect
+           x="0"
+           y="314.425"
+           width="75.9823"
+           height="33.9388"
+           class="st10"
+           id="rect118" /></g><rect
+         x="0"
+         y="314.425"
+         width="75.9823"
+         height="33.9388"
+         class="st15"
+         id="rect120" /><text
+         x="16.43"
+         y="322.39"
+         class="st9"
+         id="text122"
+         style="-inkscape-font-specification:'Calibri, Normal';font-family:Calibri;font-weight:normal;font-style:normal;font-stretch:normal;font-variant:normal;font-size:10.00001526px;text-anchor:start;text-align:start;writing-mode:lr;line-height:125%;"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4571">Rx Queues</tspan></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#000000"
+         x="21.777092"
+         y="333.69595"
+         class="st9"
+         id="text122-8"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4569"
+           x="21.777092"
+           y="333.69595">( 0-M )</tspan></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#ff0000;fill-opacity:1"
+         x="21.79059"
+         y="343.91479"
+         class="st9"
+         id="text122-0"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4573"
+           x="21.79059"
+           y="343.91479">VF(vf0)</tspan></text>
+</g><g
+       id="shape5-44"
+       transform="translate(154.994,-43.0328)"><title
+         id="title137">Rectangle.5</title><desc
+         id="desc139">filters</desc><g
+         id="shadow5-45"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><rect
+           x="0"
+           y="331.479"
+           width="303.929"
+           height="16.885"
+           class="st10"
+           id="rect142" /></g><rect
+         x="0"
+         y="331.479"
+         width="303.929"
+         height="16.885"
+         class="st16"
+         id="rect144" /><text
+         x="140.28"
+         y="342.92"
+         class="st9"
+         id="text146">filters</text>
+</g><g
+       id="shape6-52"
+       transform="translate(95.8962,-224.377)"><title
+         id="title149">Rounded Rectangle.6</title><desc
+         id="desc151">Tools to program filters</desc><path
+         d="m 7.6,347.29783 60.78,0 a 7.59811,7.59811 0 0 0 7.6,-7.59 l 0,-18.58 a 7.59811,7.59811 0 0 0 -7.6,-7.6 l -60.78,0 a 7.59811,7.59811 0 0 0 -7.6,7.6 l 0,18.58 a 7.59811,7.59811 0 0 0 7.6,7.59 z"
+         class="st8"
+         id="path153"
+         inkscape:connector-curvature="0"
+         style="fill:#a8d08d;stroke:#4f87bb;stroke-width:0.75" /><text
+         x="21.74"
+         y="328.48001"
+         class="st9"
+         id="text155"
+         style="font-size:10.00003242px;font-family:Calibri;fill:#000000">Tools to <tspan
+   x="7.6900001"
+   class="st13"
+   id="tspan157"
+   style="font-size:10.00003242px" /></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#000000"
+         x="23.40806"
+         y="340.79666"
+         class="st9"
+         id="text155-1"
+         sodipodi:linespacing="125%"><tspan
+           x="9.358057"
+           class="st13"
+           id="tspan157-9"
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:10.00001526px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start">program filters</tspan></text>
+</g><g
+       id="shape22-56"
+       transform="translate(11.4714,-156.88)"><title
+         id="title160">2-D word balloon</title><desc
+         id="desc162">Director flows to queue index in specified VF</desc><text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.0000124px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#feffff"
+         x="8.0559683"
+         y="346.97244"
+         class="st17"
+         id="text169-3-4"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4471"
+           x="8.0559683"
+           y="346.97244">inspecified VF</tspan></text>
+<g
+         id="shadow22-57"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><path
+           d="M0 327.15 L0 314.43 L28.49 314.43 L37.99 314.43 L47.49 314.43 L75.98 314.43 L75.98 327.15 L91.79 331.39         L75.98 335.64 L75.98 348.36 L47.49 348.36 L37.99 348.36 L28.49 348.36 L0 348.36 L0 335.64 L0 331.39         L0 327.15 Z"
+           class="st10"
+           id="path165" /></g><path
+         d="m 0.53783484,327.68783 0,-12.72 28.49000016,0 9.5,0 9.5,0 28.49,0 0,12.72 15.81,4.24 -15.81,4.25 0,12.72 -28.49,0 -9.5,0 -9.5,0 -28.49000016,0 0,-12.72 0,-4.25 0,-4.24 z"
+         class="st11"
+         id="path167"
+         inkscape:connector-curvature="0"
+         style="fill:#c00000;stroke:#c7c8c8;stroke-width:0.25" /><text
+         x="7.5599966"
+         y="324.19"
+         class="st17"
+         id="text169"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.0000124px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#feffff"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4446"
+           x="7.5599966"
+           y="324.19">Director flows</tspan></text>
+<text
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.0000124px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#feffff"
+         x="8.1099777"
+         y="334.57529"
+         class="st17"
+         id="text169-3"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4469"
+           x="8.1099777"
+           y="334.57529">to queue index</tspan></text>
+<text
+         x="8.5350533"
+         y="345.4624"
+         class="st17"
+         id="text169-5"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.00001221px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr;text-anchor:start;fill:#feffff;"
+         sodipodi:linespacing="125%"><tspan
+           sodipodi:role="line"
+           id="tspan4479">in specified VF</tspan></text>
+</g><g
+       id="shape24-64"
+       transform="translate(323.843,-285.05)"><title
+         id="title176">Rounded Rectangle.24</title><desc
+         id="desc178">DPDK</desc><g
+         id="shadow24-65"
+         transform="matrix(1,0,0,1,0.345598,1.97279)"
+         class="st1"><path
+           d="M9.29 348.36 L83.58 348.36 A9.28657 9.28657 -180 0 0 92.87 339.08 L92.87 295.74 A9.28657 9.28657 -180 0         0 83.58 286.45 L9.29 286.45 A9.28657 9.28657 -180 0 0 0 295.74 L0 339.08 A9.28657 9.28657 -180 0 0 9.29         348.36 Z"
+           class="st10"
+           id="path181" /></g><path
+         d="M9.29 348.36 L83.58 348.36 A9.28657 9.28657 -180 0 0 92.87 339.08 L92.87 295.74 A9.28657 9.28657 -180 0 0 83.58        286.45 L9.29 286.45 A9.28657 9.28657 -180 0 0 0 295.74 L0 339.08 A9.28657 9.28657 -180 0 0 9.29 348.36 Z"
+         class="st18"
+         id="path183" /><text
+         x="30.57"
+         y="321.61"
+         class="st19"
+         id="text185">DPDK</text>
+</g><g
+       id="shape25-70"
+       transform="translate(192.985,-285.05)"><title
+         id="title188">Rounded Rectangle.25</title><desc
+         id="desc190">Socket</desc><path
+         d="M9.29 348.36 L83.58 348.36 A9.28657 9.28657 -180 0 0 92.87 339.08 L92.87 295.74 A9.28657 9.28657 -180 0 0 83.58        286.45 L9.29 286.45 A9.28657 9.28657 -180 0 0 0 295.74 L0 339.08 A9.28657 9.28657 -180 0 0 9.29 348.36 Z"
+         class="st8"
+         id="path192" /><text
+         x="27.56"
+         y="321.61"
+         class="st19"
+         id="text194">Socket</text>
+</g><g
+       id="shape44-73"
+       transform="translate(154.994,569.271) rotate(180)"><title
+         id="title197">Simple Arrow.44</title><g
+         id="shadow44-74"
+         transform="matrix(1,0,0,1,-0.345598,-1.97279)"
+         class="st1" /></g><g
+       id="shape52-75"
+       transform="translate(154.994,-127.458)"><title
+         id="title201">Single arrowhead</title></g><g
+       id="shape70-76"
+       transform="translate(221.976,-107.027)"><title
+         id="title204">Dynamic connector.70</title><path
+         d="M9 338.16 L9 337.8 L9 325.87"
+         class="st20"
+         id="path206" /></g><g
+       id="shape81-85"
+       transform="translate(124.887,-224.377)"><title
+         id="title209">Dynamic connector.81</title><path
+         d="M9 348.36 L9 362.26"
+         class="st22"
+         id="path211" /></g><g
+       id="shape83-91"
+       transform="translate(240.398,-57.5029)"><title
+         id="title214">Dynamic connector.83</title><path
+         d="M-8.58 345.95 L-8.97 339.8"
+         class="st22"
+         id="path216" /></g><g
+       id="shape84-96"
+       transform="translate(373.94,-57.5029)"><title
+         id="title219">Dynamic connector.84</title><path
+         d="M9 345.95 L9 339.82"
+         class="st22"
+         id="path221" /></g><g
+       id="shape98-101"
+       transform="translate(539.29,6.22333) rotate(79.2209)"><title
+         id="title224">Sheet.98</title><path
+         d="M11.39 310.28 L11.72 310.42 C54.22 328.18 100.77 337.63 149.11 345.35 C162.41 347.48 175.84 349.47 187.65 347.74        C201.36 345.74 212.87 338.71 218.42 327.59 C222.66 319.09 223.42 308.2 229.69 303.23 C239.2 295.7 261.37        301.76 275.96 305.26"
+         class="st23"
+         id="path226" /></g><g
+       id="shape109-107"
+       transform="translate(712.298,124.855) rotate(100.2)"><title
+         id="title229">Sheet.109</title><path
+         d="M12.03 344.31 L12.38 344.21 C55.98 332.05 99.42 314.86 144.33 309.38 C167.01 306.62 190.06 306.85 204.84 318.11        C212.98 324.32 218.61 333.88 226.49 339.83 C238.38 348.81 255.38 349.56 275.91 347.51"
+         class="st25"
+         id="path231" /></g><g
+       id="shape110-113"
+       transform="translate(108.779,-175.962)"><title
+         id="title234">Sheet.110</title><rect
+         x="0"
+         y="341.614"
+         width="94.5"
+         height="6.75"
+         class="st27"
+         id="rect236" /></g></g></svg>
\ No newline at end of file
diff --git a/doc/guides/howto/img/ixgbe_bifu_queue_idx.svg b/doc/guides/howto/img/ixgbe_bifu_queue_idx.svg
new file mode 100644
index 0000000..f7e2bd8
--- /dev/null
+++ b/doc/guides/howto/img/ixgbe_bifu_queue_idx.svg
@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by Microsoft Visio, SVG Export ixgbe_bifu_queue_idx.svg Page-1 -->
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events"
+		xmlns:v="http://schemas.microsoft.com/visio/2003/SVGExtensions/" width="4.59375in" height="0.535375in"
+		viewBox="0 0 330.75 38.547" xml:space="preserve" color-interpolation-filters="sRGB" class="st8">
+	<v:documentProperties v:langID="1033" v:viewMarkup="false"/>
+
+	<style type="text/css">
+	<![CDATA[
+		.st1 {visibility:visible}
+		.st2 {fill:#5b9bd5;fill-opacity:0.22;filter:url(#filter_2);stroke:#5b9bd5;stroke-opacity:0.22}
+		.st3 {fill:#ffffff;stroke:#c7c8c8;stroke-width:0.25}
+		.st4 {fill:#000000;font-family:Calibri;font-size:0.833336em}
+		.st5 {fill:#c5e0b3;stroke:#c7c8c8;stroke-width:0.25}
+		.st6 {fill:#f4b183;stroke:#c7c8c8;stroke-width:0.25}
+		.st7 {fill:none;stroke:none;stroke-width:0.25}
+		.st8 {fill:none;fill-rule:evenodd;font-size:12px;overflow:visible;stroke-linecap:square;stroke-miterlimit:3}
+	]]>
+	</style>
+
+	<defs id="Filters">
+		<filter id="filter_2">
+			<feGaussianBlur stdDeviation="2"/>
+		</filter>
+	</defs>
+	<g v:mID="0" v:index="1" v:groupContext="foregroundPage">
+		<title>Page-1</title>
+		<v:pageProperties v:drawingScale="1" v:pageScale="1" v:drawingUnits="0" v:shadowOffsetX="9" v:shadowOffsetY="-9"/>
+		<g id="shape1-1" v:mID="1" v:groupContext="shape" transform="translate(3.0294,-5.34781)">
+			<title>Rectangle</title>
+			<desc>0x000000</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="52.1695" cy="30.3097" width="104.34" height="16.4746"/>
+			<g id="shadow1-2" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
+					transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+				<rect x="0" y="22.0724" width="104.339" height="16.4746" class="st2"/>
+			</g>
+			<rect x="0" y="22.0724" width="104.339" height="16.4746" class="st3"/>
+			<text x="32.27" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>0x000000</text>		</g>
+		<g id="shape2-7" v:mID="2" v:groupContext="shape" transform="translate(107.368,-5.34781)">
+			<title>Rectangle.2</title>
+			<desc>VF ID + 1</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="30.2034" cy="30.3097" width="60.41" height="16.4746"/>
+			<g id="shadow2-8" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
+					transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+				<rect x="0" y="22.0724" width="60.4068" height="16.4746" class="st2"/>
+			</g>
+			<rect x="0" y="22.0724" width="60.4068" height="16.4746" class="st5"/>
+			<text x="12.32" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>VF ID + 1</text>		</g>
+		<g id="shape3-13" v:mID="3" v:groupContext="shape" transform="translate(167.775,-5.34781)">
+			<title>Rectangle.3</title>
+			<desc>Queue Index</desc>
+			<v:userDefs>
+				<v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
+			</v:userDefs>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="79.6271" cy="30.3097" width="159.26" height="16.4746"/>
+			<g id="shadow3-14" v:groupContext="shadow" v:shadowOffsetX="0.345598" v:shadowOffsetY="-1.97279" v:shadowType="1"
+					transform="matrix(1,0,0,1,0.345598,1.97279)" class="st1">
+				<rect x="0" y="22.0724" width="159.254" height="16.4746" class="st2"/>
+			</g>
+			<rect x="0" y="22.0724" width="159.254" height="16.4746" class="st6"/>
+			<text x="53.74" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>Queue Index</text>		</g>
+		<g id="shape4-19" v:mID="4" v:groupContext="shape" transform="translate(305.063,-21.8224)">
+			<title>Sheet.4</title>
+			<desc>0</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="10.9831" cy="30.3097" width="21.97" height="16.4746"/>
+			<rect x="0" y="22.0724" width="21.9661" height="16.4746" class="st7"/>
+			<text x="8.45" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>0</text>		</g>
+		<g id="shape6-22" v:mID="6" v:groupContext="shape" transform="translate(165.029,-21.8224)">
+			<title>Sheet.6</title>
+			<desc>31</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="10.9831" cy="30.3097" width="21.97" height="16.4746"/>
+			<rect x="0" y="22.0724" width="21.9661" height="16.4746" class="st7"/>
+			<text x="5.91" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>31</text>		</g>
+		<g id="shape7-25" v:mID="7" v:groupContext="shape" transform="translate(104.623,-21.8224)">
+			<title>Sheet.7</title>
+			<desc>39</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="10.9831" cy="30.3097" width="21.97" height="16.4746"/>
+			<rect x="0" y="22.0724" width="21.9661" height="16.4746" class="st7"/>
+			<text x="5.91" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>39</text>		</g>
+		<g id="shape8-28" v:mID="8" v:groupContext="shape" transform="translate(3.0294,-21.8224)">
+			<title>Sheet.8</title>
+			<desc>63</desc>
+			<v:textBlock v:margins="rect(4,4,4,4)"/>
+			<v:textRect cx="10.9831" cy="30.3097" width="21.97" height="16.4746"/>
+			<rect x="0" y="22.0724" width="21.9661" height="16.4746" class="st7"/>
+			<text x="5.91" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>63</text>		</g>
+	</g>
+</svg>
diff --git a/doc/guides/howto/index.rst b/doc/guides/howto/index.rst
index 4b97a32..a912d82 100644
--- a/doc/guides/howto/index.rst
+++ b/doc/guides/howto/index.rst
@@ -36,3 +36,4 @@ How To User Guide
     :numbered:
 
     lm_bond_virtio_sriov
+    flow_bifurcation
-- 
2.4.0



More information about the dev mailing list