40 lines
1.9 KiB
XML
40 lines
1.9 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="specialized-networking-example">
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<?dbhtml stop-chunking?>
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<title>Specialized networking example</title>
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<para>Some applications that interact with a network require
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specialized connectivity. Applications such as a looking glass
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require the ability to connect to a BGP peer, or route
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participant applications may need to join a network at a layer
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2 level.</para>
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<section xml:id="challenges-specialized-networking">
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<title>Challenges</title>
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<para>Connecting specialized network applications to their
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required resources alters the design of an OpenStack
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installation. Installations that rely on overlay networks are
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unable to support a routing participant, and may also block
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layer-2 listeners.</para>
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</section>
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<section xml:id="possible-solutions-specialized-networking">
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<title>Possible solutions</title>
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<para>Deploying an OpenStack installation using OpenStack Networking with a
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provider network allows direct layer-2 connectivity to an
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upstream networking device. This design provides the layer-2
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connectivity required to communicate via Intermediate
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System-to-Intermediate System (ISIS) protocol or to pass
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packets controlled by an OpenFlow controller. Using the
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multiple layer-2 plug-in with an agent such as
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<glossterm>Open vSwitch</glossterm>
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allows a private connection through a VLAN directly to a
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specific port in a layer-3 device. This allows a BGP
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point-to-point link to join the autonomous
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system. Avoid using layer-3 plug-ins as they divide the
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broadcast domain and prevent router adjacencies from
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forming.</para>
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</section>
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</section>
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