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+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<chapter id="tor-config-req">
+  <title>Top of the Rack (TOR) Configuration Requirements</title>
+
+  <para>The switching infrastructure provides connectivity for the ENFV
+  infrastructure operations, tenant networks (East/West) and provider
+  connectivity (North/South). It also provides needed connectivity for the
+  Storage Area Network (SAN).</para>
+
+  <para>To avoid traffic congestion, it is strongly encouraged that 3
+  physically separated networks be used: 1 physical network for administration
+  and control, 1 physical network for tenant private and public networks, and
+  1 for SAN. The switching connectivity can (but does not need to) be fully
+  redundant, in such case it comprises a redundant 10GE switch pair for each
+  of the 3 networks.</para>
+
+  <para>The physical TOR switches are not automatically configured from the
+  Fuel ENFV reference platform. All networks involved in the ENFV
+  infrastructure as well as the provider networks and the private tenant VLANs
+  need to be manually configured.</para>
+
+  <para>Manual configuration of the ENFV 1.0 hardware platform should be
+  carried out according to the <ulink
+  url="https://wiki.opnfv.org/display/pharos/Pharos+Specification">ENFV Pharos
+  specification</ulink>.</para>
+</chapter>
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