ed7de99b58
Refactoor linking for DS use. Change-Id: I6de5813fb7df5741e13d34163545d2402a4fd6c5 Signed-off-by: Ron Stone <ronald.stone@windriver.com>
98 lines
3.7 KiB
ReStructuredText
98 lines
3.7 KiB
ReStructuredText
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.. include:: /_stx-related-links/dynamic-vxlan.rln
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.. RL strings
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.. include:: /_vendor/rl-strings.txt
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.. rcy1511538457696
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.. _dynamic-vxlan:
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=============
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Dynamic VXLAN
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=============
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|prod-os| supports dynamic mode (learning) VXLAN implementation that has each
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vSwitch instance registered on the network for a particular IP multicast group,
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|MAC| addresses, and |VTEP| endpoints that are populated based on neutron
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configuration data.
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The IP multicast group, (for example, 239.1.1.1), is input when a new
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neutron data network is provisioned. The selection of the IP multicast group
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constraints flooding to only those nodes that have registered for the specified
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group. The IP multicast network can work in both a single subnet (that is,
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local Layer2 environment) or can span Layer3 segments in the customer network
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for more complex routing requirements but requires IP multicast enabled routers.
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.. only:: starlingx
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In the dynamic |VXLAN| mode, when a VM instance sends a packet to some
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destination node the |VXLAN| implementation examines the
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destination MAC address to determine how to treat the packet. If the
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destination is known, a unicast packet is sent to the compute node hosting
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that VM instance. If the destination is unknown or the packet is a
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broadcast/multicast packet then a multicast packet is sent to all compute
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nodes. Once the destination VM instance receives the packet and responds to
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the initial source compute node, it learns that the VM is hosted from that
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compute node, and any future packets destined to that VM instance are
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unicasted to that compute node.
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.. only:: partner
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.. include:: /_includes/dynamic-vxlan.rest
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:start-after: vswitch-text-1-begin
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:end-before: vswitch-text-1-end
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.. figure:: /shared/figures/datanet/eol1510005391750.png
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Multicast Endpoint Distribution
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.. only:: starlingx
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For broadcast and multicast packets originating from the VM instances
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implements head-end replication to clone and send a copy of the packet to
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each known compute node. This operation is expensive and will negatively
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impact performance if the network is experiencing high volume of broadcast
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or multicast packets.
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.. only:: partner
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.. include:: /_includes/dynamic-vxlan.rest
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:start-after: vswitch-text-1-begin
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:end-before: vswitch-text-1-end
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.. _dynamic-vxlan-section-N10054-N1001F-N10001:
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-------------------------------------------------
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Workflow to Configure Dynamic VXLAN Data Networks
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-------------------------------------------------
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Use the following workflow to create dynamic |VXLAN| data networks and add
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segmentation ranges using the |CLI|.
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.. _dynamic-vxlan-ol-bpj-dlb-1cb:
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#. Create a VXLAN data network, see |adding-data-networks-using-the-cli|.
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#. Add segmentation ranges to dynamic |VXLAN| (Multicast |VXLAN|) data
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networks, see :ref:`Adding Segmentation Ranges Using the CLI
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<adding-segmentation-ranges-using-the-cli>`.
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#. Configure the endpoint IP addresses of the compute nodes using the
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|os-prod-hor-long| or the |CLI|:
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- To configure static IP addresses for individual data interfaces, see:
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:ref:`Adding a Static IP Address to a Data Interface
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<adding-a-static-ip-address-to-a-data-interface>`
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- To assign IP addresses from predefined address pools, see:
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:ref:`Using IP Address Pools for Data Interfaces
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<using-ip-address-pools-for-data-interfaces>`
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#. Establish routes between the hosts, see :ref:`Adding and Maintaining Routes
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for a VXLAN Network <adding-and-maintaining-routes-for-a-vxlan-network>`.
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For more information on the differences between the dynamic and static |VXLAN|
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modes, see :ref:`Differences Between Dynamic and Static VXLAN Modes
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<differences-between-dynamic-and-static-vxlan-modes>`.
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