Configuring VLAN

To create a VLAN:

Switch# conf t
Switch(config)# vlan 50
Switch(config-vlan)# name sysnet
Switch(config-vlan)# exit 

Assigning to an interface:

Switch(config)# int fa 1/3
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 50
Switch(config-if)# no shut

To delete a VLAN:

 Switch(config)# no vlan 50

VLAN Verification

To determine the trunking status of an interface:

 # show int fa 1/24 trunk OR # show trunk.

For more detailed switchport information:

# show int fa 1/24 switchport

To determine the physical status of a link:

# show int fa 1/24 status

To see a list of VLANs and their assigned interfaces:

# show vlan brief

To check if an interface is assigned to a specific VLAN:

# show vlan id 100

This command is especially helpful as it displays all ports belonging to the VLAN as well as the MTU of each assigned port and type.To see a complete detailed interface list for all VLANs:

# show vlan