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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>12.4. Layer-2 Switch</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta name="generator" content="publican 2.8" /><meta name="package" content="Apache_CloudStack-Installation_Guide-4.0.0-incubating-en-US-1-" /><link rel="home" href="index.html" title="CloudStack Installation Guide" /><link rel="up" href="network-setup.html" title="Chapter 12. Network Setup" /><link rel="prev" href="hardware-config-eg.html" title="12.3. Example Hardware Configuration" /><link rel="next" href="hardware-firewall.html" title="12.5. Hardware Firewall" /></head><body><p id="title"><a class="left" href="http://cloudstack.org"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="http://docs.cloudstack.org"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="hardware-config-eg.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="hardware-firewall.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="section" id="layer2-switch" lang="en-US"><div class="titlepage"><div><div><h2 class="title" id="layer2-switch">12.4. Layer-2 Switch</h2></div></div></div><div class="para">
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The layer-2 switch is the access switching layer inside the pod.
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</div><div class="itemizedlist"><ul><li class="listitem"><div class="para">
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It should trunk all VLANs into every computing host.
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</div></li><li class="listitem"><div class="para">
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It should switch traffic for the management network containing computing and storage hosts. The layer-3 switch will serve as the gateway for the management network.
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</div></li></ul></div><div class="formalpara"><h5 class="formalpara" id="idp22191000">Example Configurations</h5>
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This section contains example configurations for specific switch models for pod-level layer-2 switching. It assumes VLAN management protocols such as VTP or GVRP have been disabled. The scripts must be changed appropriately if you choose to use VTP or GVRP.
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</div><div xml:lang="en-US" class="section" id="dell62xx-layer2" lang="en-US"><div class="titlepage"><div><div><h3 class="title" id="dell62xx-layer2">12.4.1. Dell 62xx</h3></div></div></div><div class="para">
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The following steps show how a Dell 62xx is configured for pod-level layer-2 switching.
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</div><div class="orderedlist"><ol><li class="listitem"><div class="para">
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Configure all the VLANs in the database.
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</div><pre class="programlisting">vlan database
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vlan 300-999
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exit</pre></li><li class="listitem"><div class="para">
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VLAN 201 is used to route untagged private IP addresses for pod 1, and pod 1 is connected to this layer-2 switch.
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</div><pre class="programlisting">interface range ethernet all
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switchport mode general
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switchport general allowed vlan add 300-999 tagged
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exit</pre></li></ol></div><div class="para">
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The statements configure all Ethernet ports to function as follows:
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</div><div class="itemizedlist"><ul><li class="listitem"><div class="para">
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All ports are configured the same way.
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</div></li><li class="listitem"><div class="para">
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All VLANs (300-999) are passed through all the ports of the layer-2 switch.
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</div></li></ul></div></div><div xml:lang="en-US" class="section" id="cisco3750-layer2" lang="en-US"><div class="titlepage"><div><div><h3 class="title" id="cisco3750-layer2">12.4.2. Cisco 3750</h3></div></div></div><div class="para">
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The following steps show how a Cisco 3750 is configured for pod-level layer-2 switching.
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</div><div class="orderedlist"><ol><li class="listitem"><div class="para">
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Setting VTP mode to transparent allows us to utilize VLAN IDs above 1000. Since we only use VLANs up to 999, vtp transparent mode is not strictly required.
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</div><pre class="programlisting">vtp mode transparent
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vlan 300-999
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exit</pre></li><li class="listitem"><div class="para">
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Configure all ports to dot1q and set 201 as the native VLAN.
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</div><pre class="programlisting">interface range GigabitEthernet 1/0/1-24
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switchport trunk encapsulation dot1q
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switchport mode trunk
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switchport trunk native vlan 201
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exit</pre></li></ol></div><div class="para">
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By default, Cisco passes all VLANs. Cisco switches complain of the native VLAN IDs are different when 2 ports are connected together. That’s why you must specify VLAN 201 as the native VLAN on the layer-2 switch.
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</div></div></div><ul class="docnav"><li class="previous"><a accesskey="p" href="hardware-config-eg.html"><strong>Prev</strong>12.3. Example Hardware Configuration</a></li><li class="up"><a accesskey="u" href="#"><strong>Up</strong></a></li><li class="home"><a accesskey="h" href="index.html"><strong>Home</strong></a></li><li class="next"><a accesskey="n" href="hardware-firewall.html"><strong>Next</strong>12.5. Hardware Firewall</a></li></ul></body></html>
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