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58 lines
2.9 KiB
XML
58 lines
2.9 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="pvlan">
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<title>Isolation in Advanced Zone Using Private VLAN</title>
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<para/>
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<section id="about-pvlan">
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<title>About Private VLAN</title>
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<para>In an Ethernet switch, a VLAN is a broadcast domain in which hosts can establish direct
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communication with each another at Layer 2. Private VLAN is designed as an extension of VLAN
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standard to add further segmentation of the logical broadcast domain. A regular VLAN is a
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single broadcast domain, whereas a private VLAN partitions a larger VLAN broadcast domain into
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smaller sub-domains. A sub-domain is represented by a pair of VLANs: a Primary VLAN and a
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Secondary VLAN. The original VLAN that is being divided into smaller groups is called
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Primary, That implies all VLAN pairs in a private VLAN share the same Primary VLAN. All the
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secondary VLANs exist only inside the Primary. Each Secondary VLAN has a specific VLAN ID
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associated to it, which differentiates one sub-domain from another.</para>
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<para>For further reading:</para>
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<itemizedlist>
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<listitem>
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<para><ulink
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url="http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_see/configuration/guide/swpvlan.html#wp1038379"
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>Understanding Private VLANs</ulink></para>
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</listitem>
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<listitem>
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<para><ulink url="http://tools.ietf.org/html/rfc5517">Cisco Systems' Private VLANs: Scalable
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Security in a Multi-Client Environment</ulink></para>
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</listitem>
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<listitem>
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<para><ulink url="http://kb.vmware.com">Private VLAN (PVLAN) on vNetwork Distributed Switch
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- Concept Overview (1010691)</ulink></para>
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</listitem>
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</itemizedlist>
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</section>
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<section id="prereq-pvlan">
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<title>Prerequisites</title>
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<para>Ensure that you configure private VLAN on your physical switches out-of-band.</para>
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</section>
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</section>
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