To configure a core switch, connect it physically using console and network cables, then access its CLI to set hostnames, VLANs, and IP addresses for network management.

Physical Setup

1. Inspect the switch and cables: Ensure the switch is powered off initially and check all network and console cables for damage. Identify the console port (Serial or USB) and network ports on the switch .
2. Connect the console cable: Attach one end of a console cable to the switch's console port and the other end to your PC's serial port. If your PC lacks a serial port, use a USB-to-serial adapter .
3. Connect network cables: Use Ethernet cables to connect the switch ports to other switches, routers, or servers. For uplinks to other core switches, use high-speed ports (e.g., Gigabit or 10G) to ensure optimal performance .
4. Power on the switch: Plug in the power cable and wait for the system LEDs to indicate the switch is operational (green for normal operation), .

Accessing the Switch CLI

1. Open terminal software: Use PuTTY, Tera Term, or similar software to access the switch via the console connection .
2. Configure serial connection: Select the correct COM port and set the speed to 9600 bps. Click “Open” to access the CLI .
3. Enter privileged mode: Type enable to enter privileged EXEC mode, then configure terminal to enter Global Configuration Mode .

Basic Configuration Steps

1. Set hostname: Assign a recognizable name for the switch using hostname Switch1 to simplify network management .
2. Assign management IP: Configure an IP address on the management VLAN to allow remote access via SSH or Telnet. Example:

   interface vlan 1ip address 192.168.1.10 255.255.255.0no shutdown

3. Configure VLANs: Create VLANs for different network segments using vlan <ID> and assign ports to VLANs with switchport access vlan <ID> .
4. Enable SSH for secure remote management: Generate RSA keys and enable SSH version 2 to secure remote access .
5. Verify connectivity: Use ping and show vlan brief commands to ensure devices are reachable and VLANs are correctly assigned .

Testing and Optimization

• Check link lights: Ensure all connected devices show active link LEDs.
• Test network traffic: Connect client devices and verify they can communicate across VLANs and reach the gateway.
• Document configuration: Record IP addresses, VLAN IDs, and port assignments for future reference and troubleshooting . By following these steps, your core switch will be physically connected, properly configured, and ready to manage network traffic efficiently.