To configure an access port on a switch, set the port to access mode and assign it to a specific VLAN, allowing it to carry traffic for only that VLAN.

Step-by-Step Configuration

1. Connect to the Switch Use a console cable, SSH, or Telnet to access the switch CLI. Enter privileged EXEC mode by typing enable and providing the password if required .

2. Enter Global Configuration Mode Type configure terminal to enter configuration mode where you can modify interface settings .

3. Select the Interface Identify the port you want to configure (e.g., FastEthernet 0/1 or GigabitEthernet 1/0/1) and enter interface configuration mode:

   interface Fa0/1

   or

   interface Gi1/0/1"' [^1^] [^2^].

4. Set the Port to Access Mode Configure the port to operate as an access port, which ensures it will carry traffic for only one VLAN:

   switchport mode access"' [^3^] [^2^].

5. Assign the VLAN Specify the VLAN that the access port should belong to:

   switchport access vlan 10

   Replace 10 with the VLAN ID you want the port to use .

6. Enable the Port If the port is administratively down, bring it up using:

   no shutdown"' [^1^].

7. Save the Configuration Make the changes permanent by copying the running configuration to startup configuration:

   copy running-config startup-config"' [^1^].

Verification

• Check the port status and VLAN assignment:

  show running-configshow interfaces switchport

  These commands display the current mode (access or trunk) and the VLAN assigned to the port .

• Test connectivity by connecting an end device to the port and pinging another device in the same VLAN .

Key Points

• Access ports carry traffic for a single VLAN and are typically used for end devices like PCs, printers, or IP phones .
• Trunk ports carry multiple VLANs and are used for switch-to-switch or switch-to-router connections .
• A port cannot be configured as both access and trunk simultaneously; the last command executed takes effect .
• By default, all switch ports are in VLAN 1 unless reassigned .

Following these steps ensures that your switch ports are correctly configured to connect end devices to the appropriate VLAN, maintaining proper network segmentation and traffic flow.