Objective
This article aims to show how to create, edit, or delete a VLAN on a Cisco Business 250 or 350 series switch.
Applicable Devices | Software Version
Introduction
Virtual Local Area Network (VLAN) creation allows you to make separate broadcast domains on a switch. The
broadcast domains can associate with one another with the help of a Layer 3 device such as a router. A VLAN
is
mainly used to form groups among the hosts regardless of where the hosts are physically located. Thus, a VLAN
improves security with the help of group formation among the hosts. When a VLAN is created, it has no effect
until that VLAN is attached to at least one port either manually or dynamically. One of the most common reasons to
set up a VLAN is to set up a separate VLAN for voice, and a separate VLAN for data. This directs the packets for
both types of data despite using the same network.
VLAN Settings
Create a VLAN
Step 1. Log in to the web-based utility and choose VLAN Management > VLAN Settings.
Step 2. Under the VLAN Table area, click Add to create a new VLAN. A window will pop-up.
Step 3. VLAN can be added in two different methods as shown by the options below. Choose a radio button that
corresponds to the desired method:
- VLAN - Use this method to create a specific VLAN.
- Range - Use this method to create a range VLANs.
Step 4. If you chose VLAN in Step 3, enter the VLAN ID in the VLAN ID field. The range must be between 2 to
4094. For this example, the VLAN ID will be 4.
Step 5. In the VLAN Name field, enter a name for the VLAN. For this example, the VLAN Name will be
Accounting. Up to 32 characters may be used.
Step 6. Check the VLAN Interface State check box to enable the VLAN interface state; it is already
checked
by default. If not, the VLAN will be effectively shut down, and nothing will be able to be transmitted or received
through the VLAN.
Step 7. Check the Link Status SNMP Traps check box if you want to enable the generation of SNMP traps. This
is
enabled by default.
Step 8. If you chose Range in Step 3, enter the range of the VLANs in
the VLAN Range field. The available range is 2–4094. For this example, the VLAN Range is from 3 to
52.
Up to 100 VLANs can be created at a time.
Step 9. Click Apply.
Edit a VLAN
Step 1. Log in to the web-based utility and choose VLAN Management > VLAN Settings. The VLAN
Settings page opens.
Step 2. Check the check box next to the VLAN you want to edit.
Step 3. Click Edit to edit the selected VLAN. The Edit VLAN window appears.
Step 4. The current VLAN can be changed using the VLAN ID drop-down list. This is used to quickly switch
between the VLANs you want to configure without returning to the VLAN Settings page.
Step 5. Edit the name of the VLAN in the VLAN Name field. This name does not impact the performance of
the
VLAN, and is used for easy identification.
Step 6. Check the VLAN Interface State check box to enable the VLAN’s interface state; it is already checked by
default. If not, the VLAN will be effectively shut down, and nothing will be able to be transmitted or received
through the VLAN.
Step 7. Check the Enable Link Status SNMP Traps check box to enable the generation of SNMP traps with link
status information. This box is checked by default.
Step 8. Click Apply.
Delete a VLAN
Step 1.Log in to the web-based utility and choose VLAN Management > VLAN Settings.
Step 2. Check the check box next to the VLAN you want to delete.
Step 3. Click Delete to delete the selected VLAN.
You have now successfully deleted a VLAN on your Cisco Business 250 or 350 series switch.
Looking for more information on VLANs for your Cisco Business Switches? Check out any of the following links for more information.
Article Skeleton w/ Content
Objective
The objective of this document is to show you how to configure a basic VLAN via the Command Line Interface (CLI) on Cisco Business 250 or 350 series switches.
Applicable Devices | Software Version
Introduction
VLANs allow you to logically segment a LAN into different broadcast domains. In scenarios where sensitive data may be broadcast on a network, VLANs can be created to enhance security by designating a broadcast to a specific VLAN. Only users that belong to a VLAN are able to access and manipulate the data on that VLAN. VLANs can also be used to enhance performance by reducing the need to send broadcasts and multicasts to unnecessary destinations.
Basic VLAN Configuration
Step 1. Login to the switch’s Command Line Interface (CLI).
Creating a VLAN
Step 1. Enter the following commands to create a VLAN:
Command |
Purpose |
config |
Enter configuration mode. |
vlan database |
Enter VLAN database mode. |
vlan <ID> |
Create a new VLAN with an ID specified. |
end |
Exit from configure mode. |
Step 2. (Optional) Enter the following command to display VLAN information:
Command |
Purpose |
show vlan |
Display VLAN information. |
The VLAN information table will vary depending on the type of switch you are using. The Ports field will also vary since different switches have different port types and numbering schemes.
Assigning a Port to a VLAN
Once the VLANs are created, you need to assign the ports to the appropriate VLAN. You can configure ports using the switchport command and specify whether the port should be in access or trunk mode.
The port modes are defined as follows:
- Access - frames received on the interface are assumed to not have a VLAN tag and are assigned to the VLAN indicated by the command. Access ports are used primarily for hosts and can only carry traffic for a single VLAN.
- Trunk - frames received on the interface are assumed to have VLAN tags. Trunk ports are for links between switches or other network devices and are capable of carrying traffic for multiple VLANs.
By default, all interfaces are in trunk mode, which means they can carry traffic for all VLANs.
Step 1. Enter the following commands to configure an access port:
Command |
Purpose |
conf t |
Enter configuration mode. |
int <port number> |
Enter interface configuration mode for the specified port number. Gigabit Ethernet, Fast Ethernet and port-channels are valid. |
switchport mode access |
Sets the interface as a nontrunking nontagged single-VLAN Ethernet interface. An access port can carry traffic in one VLAN only. |
switchport access vlan <ID> |
Specifies the VLAN for which this access port will carry traffic. |
no shut |
Turn on (enable) the port. |
end |
Exit from configure mode. |
Step 2. (Optional) Enter the show vlan command to see your assigned port.
CBS350#show vlan
Step 3. Enter the following commands to configure a trunk port and specify that only certain VLANs are allowed on the specified trunk:
Command |
Purpose |
conf t |
Enter configuration mode. |
int <port number> |
Enter interface configuration mode for the specified port number. Gigabit Ethernet, Fast Ethernet and port-channels are valid. |
switchport mode trunk |
Make the specified port number aware of all VLANs. |
switchport trunk allowed vlan add <ID> |
Makes the port a member in the specified VLAN ID and gives it an Egress Rule: Tagged. This means packets are tagged with the VLAN ID as they leave this port on the device. |
no shut |
Turn on (enable) the port. |
end |
Exit from configure mode. |
In trunk mode, all VLANs are allowed by default. Using the switchport trunk allowed vlan add command lets you configure the VLANs allowed on the trunk.
Step 4. (Optional) Enter the show vlan command to see your changes.
CBS350#show vlan
Step 5. (Optional) Enter the following command to display information about a port:
Command |
Purpose |
show interfaces switchport <port number> |
Display information such as VLAN membership, the Egress rule, and forbidden VLANs for the specified port. |
For more information, check out the links below.
Looking for more information on VLANs for your Cisco Business Switches? Check out any of the following links for more information.