Brief – it displays one line for every VLAN with the name of VLAN, status, and ports.Verifying VLAN InformationĪfter a VLAN configuration or some changes in the VLAN configuration, we must validate the configuration using the Cisco IOS show commands. Now we can again assign these ports to any VLAN. It is not required to first remove a port from a VLAN for changing its membership. The command show interfaces f0/1 switchport verify that the access VLAN for Fa0/1 interface has been reset to VLAN 1. VLAN 10 is still active, but there are no ports in the VLAN. Use the following command to create VLANs 10, 20, 30, 40, and VLANs 50-60. The IDs can be entered separated by commas and the range of VLAN IDs can be separated by hyphens for example “vlan vlan-id”. So, we can create VLANs one by one, using a series of VLAN IDs and using a range. Now we should create some VLANs including VLAN-10 and VLAN-20 on Sw-2. The figure below illustrates the topology where Sw-1 has already been configured with VLAN 10 and 20. We can check using the Syntax Checker show vlan brief command in user exec mode to display the contents of the vlan.dat file. Naming each VLAN is the best practice in VLAN configuration. The figure below illustrates the Cisco IOS command syntax used to add a VLAN to a Cisco switch and give it a name. We have a simple network of a single host and a switch.But, other details are usually configured on a Cisco switch at the same time when VLANs are created it is best to save running configuration changes to the startup configuration. (Optional) Add the ip name-server IP_ADDRESS global configuration command to configure the DNS server.(Optional) use the ip default-gateway IP_ADDRESS global configuration command to configure the default gateway.

enable the VLAN 1 interface with the no shutdown interface subcommand.

assign an IP address with the ip address IP_ADDRESS SUBNET_MASK interface subcommand.

enter the VLAN 1 configuration mode with the interface vlan 1 global configuration command.

Here are the steps to configure an IP address under VLAN 1: Usually, the default VLAN 1 acts like the switch’s own NIC for connecting into a LAN to send IP packets. The IP address is configured under a logical interface, known as the management domain or VLAN. However, to perform switch managent over the network or use protocols such as SNMP, your switch will need to have an IP address. This means that you can buy a Cisco switch, plug in the right cables to connect various devices to the switch, power it on, and the switch should work. By default, Cisco switches perform Ethernet frames forwarding without any configuration.

Configuring vlan cisco switch