Switch Access Port

 

What is a Access port on a Cisco switch.

An access port is a nontrunking, untagged single VLAN Layer 2 interface in its default configuration.

By default, a Cisco switchport is set to "dynamic desireable", meaning that if you connect a device that supports trunking, then the switchport will negotiate a trunk. By setting the port as access port it will ignore all attempts to negotiate link type. As a best practice and from security perspective it is advised to define  the switch port mode.

Switch Port Configuration

You can configure individual or range of ports/interfaces on a switch with various information and settings as explained below.

Selecting Ports to Configure

We need to select one or more switch ports to configure. "Ports" are also referred as "Interfaces". To select a single switch port, Enter global config mode and type the following command.

Switch(config)# interface type module/number

What is a VLAN

What is a VLAN
 
VLAN or virtual Lan is a technology to virtually segregate ports into one single broadcast domain. You don’t have to configure a VLAN until your network gets so large and has so much traffic or groups of users need more security and need to be separated with rest of traffic.