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47 lines
3.8 KiB
XML
47 lines
3.8 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><para>For the most up-to-date list of supported network services, see the &PRODUCT; UI or call listNetworkServices.</para></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><para>DHCP</para></listitem>
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<listitem><para>DNS</para></listitem>
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<listitem><para>Source NAT</para></listitem>
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<listitem><para>Static NAT</para></listitem>
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<listitem><para>Port Forwarding</para></listitem>
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<listitem><para>Load Balancing</para></listitem>
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<listitem><para>Firewall</para></listitem>
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<listitem><para>VPN</para></listitem>
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<listitem><para>Optional) Name one of several available providers to use for a given service, such as Juniper for the firewall</para></listitem>
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<listitem><para>(Optional) Network tag to specify which physical network to use</para></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 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 to the default network offerings provided by &PRODUCT;. By creating multiple custom network offerings, you can set up your cloud to offer different classes of service on a single multi-tenant physical network. For example, while the underlying physical wiring may be the same for two tenants, tenant A may only need simple firewall protection for their website, while tenant B may be running a web server farm and require a scalable firewall solution, load balancing solution, and alternate networks for accessing the database backend.</para>
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<note><para>If you create load balancing rules while using a network service offering that includes an external load balancer device such as NetScaler, and later change the network service offering to one that uses the &PRODUCT; virtual router, you must create a firewall rule on the virtual router for each of your existing load balancing rules so that they continue to function.</para></note>
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<para>When creating a new virtual network, the &PRODUCT; administrator chooses which network offering to enable for that network. Each virtual network is associated with one network offering. A virtual network can be upgraded or downgraded by changing its associated network 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 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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