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88 lines
4.0 KiB
XML
88 lines
4.0 KiB
XML
<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "cloudstack.ent">
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%BOOK_ENTITIES;
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]>
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<!-- Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<section id="network-offerings">
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<title>Network Offerings</title>
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<note>
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<para>For the most up-to-date list of supported network services, see the &PRODUCT; UI or call
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listNetworkServices.</para>
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</note>
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<para>A network offering is a named set of network services, such as:</para>
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<itemizedlist>
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<listitem>
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<para>DHCP</para>
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</listitem>
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<listitem>
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<para>DNS</para>
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</listitem>
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<listitem>
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<para>Source NAT</para>
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</listitem>
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<listitem>
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<para>Static NAT</para>
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</listitem>
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<listitem>
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<para>Port Forwarding</para>
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</listitem>
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<listitem>
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<para>Load Balancing</para>
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</listitem>
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<listitem>
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<para>Firewall</para>
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</listitem>
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<listitem>
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<para>VPN</para>
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</listitem>
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<listitem>
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<para>(Optional) Name one of several available providers to use for a given service, such as
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Juniper for the firewall</para>
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</listitem>
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<listitem>
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<para>(Optional) Network tag to specify which physical network to use</para>
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</listitem>
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</itemizedlist>
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<para>When creating a new VM, the user chooses one of the available network offerings, and that
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determines which network services the VM can use.</para>
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<para>The &PRODUCT; administrator can create any number of custom network offerings, in addition
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to the default network offerings provided by &PRODUCT;. By creating multiple custom network
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offerings, you can set up your cloud to offer different classes of service on a single
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multi-tenant physical network. For example, while the underlying physical wiring may be the same
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for two tenants, tenant A may only need simple firewall protection for their website, while
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tenant B may be running a web server farm and require a scalable firewall solution, load
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balancing solution, and alternate networks for accessing the database backend.</para>
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<note>
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<para>If you create load balancing rules while using a network service offering that includes an
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external load balancer device such as NetScaler, and later change the network service offering
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to one that uses the &PRODUCT; virtual router, you must create a firewall rule on the virtual
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router for each of your existing load balancing rules so that they continue to
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function.</para>
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</note>
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<para>When creating a new virtual network, the &PRODUCT; administrator chooses which network
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offering to enable for that network. Each virtual network is associated with one network
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offering. A virtual network can be upgraded or downgraded by changing its associated network
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offering. If you do this, be sure to reprogram the physical network to match.</para>
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<para>&PRODUCT; also has internal network offerings for use by &PRODUCT; system VMs. These network
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offerings are not visible to users but can be modified by administrators.</para>
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<xi:include href="creating-network-offerings.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
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</section>
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