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| <section id="cisco3750-layer2"> |
| <title>Cisco 3750</title> |
| <para>The following steps show how a Cisco 3750 is configured for pod-level layer-2 |
| switching.</para> |
| <orderedlist> |
| <listitem> |
| <para>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.</para> |
| <programlisting>vtp mode transparent |
| vlan 300-999 |
| exit</programlisting> |
| </listitem> |
| <listitem> |
| <para>Configure all ports to dot1q and set 201 as the native VLAN.</para> |
| <programlisting>interface range GigabitEthernet 1/0/1-24 |
| switchport trunk encapsulation dot1q |
| switchport mode trunk |
| switchport trunk native vlan 201 |
| exit</programlisting> |
| </listitem> |
| </orderedlist> |
| <para>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.</para> |
| </section> |