Category: VLANS and Trunking

Cisco – Configure Cisco Catalyst 3560 VLANs

You may use the following method to configure Virtual LANs (VLANs) on a Cisco Catalyst 3560 switch. VLANs allow you to segment a layer 2 switched network by increasing the number of layer 2 broadcast domains and decreasing their size. Additionally, VLANs provide an added measure of network security.

Begin by entering global configuration mode with the configure terminal command.

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Next, use the vlan # command where the # sign is the number of the VLAN. Additionally, use the name “name” command to provide a custom description of the VLAN. In this example there are three created VLANS, 2 (Sales), 3 (Marketing) and 4 (Accounting).

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Lastly, you may verify the creation of the VLANs with the show vlan command.

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Enjoy!


Cisco – Configure Cisco Catalyst 3560 Switch Trunk

You may use the following method to configure a Cisco Catalyst3560 switch port as a trunk. In this example we will use the FastEthernet 0/24 port.

Begin by entering global configuration mode and specifying the port, FastEthernet 0/24, that will be configured as a trunk port.

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Next, we must specify the version of trunking we will implement. In this example we will implement IEEE 802.1q trunking which is specified by the switchport trunk encapsulation dot1q command.

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Next, we enable the trunk with the switchport mode trunk command. Note that this command will automatically negotiates to convert the link on the other end to a trunk link.

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Lastly, you may verify the trunk port with the show interface trunk command.

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Enjoy!