Cisco Catalyst 9300 Configuration Guide

Setup, Stacking, Passwords, and Troubleshooting

When you’re rolling out a network built for speed, scale, and rock-solid reliability, Cisco’s Catalyst 9300 series switches are hard to beat. They’re the backbone of enterprise networks, ready to handle everything from heavy campus traffic to growing IoT fleets.

Before we dive into the technical details, let’s start with a quick overview of how to get the most out of your Catalyst 9300 deployment.

Catalyst 9300 Configuration Guide Overview

Before diving into setup and configuration, it’s important to understand the full capabilities of the Cisco Catalyst 9300 series. This guide walks you through key processes including switch setup, stacking, licensing, and troubleshooting, offering a clear path for configuring your Catalyst 9300 infrastructure.

Catalyst 9300 Series Overview

The Catalyst 9300 Series is built for businesses that don’t mess around when it comes to connectivity. With high-density 1G Ethernet ports, StackWise® virtual stacking, Layer 3 routing, and serious security baked in, these switches are designed to handle real-world enterprise demands.

Key features include:

• Stack up to eight switches into a single logical device
• Built-in support for Cisco DNA and SD-Access
• High-performance UADP 2.0 ASIC
• Upgradable software licenses for future needs

Whether you’re upgrading an old infrastructure or starting from scratch, the Cisco Catalyst 9300 delivers serious flexibility.

How to Perform Initial Configuration on Cisco 9300

Let’s start at square one: configuring your switch to join the network party.

Accessing the Console Port

1. Grab your console cable (USB-C or RJ-45, depending on your model).
2. Connect your laptop to the switch’s console port.
3. Fire up your terminal emulator (PuTTY, Tera Term, or SecureCRT).
4. Set your serial settings:

• • 9600 baud
  • 8 data bits
  • No parity
  • 1 stop bit
  • No flow control

Power on the switch, and you’re in business.

Default Username and Password

Fresh out of the box, the Cisco Catalyst 9300 typically ships with no password set — just hit Enter when prompted.

On newer images, Cisco may preconfigure a default password. (Always double-check release notes.)

Pro Tip: Never leave a production switch on default settings. Security starts at first login.

Changing Default Credentials for Security

Once you’re logged in, change the credentials immediately:

    Switch> enable

    Switch# configure terminal

    Switch(config)# username admin password Your$ecureP@ssword

    Switch(config)# enable secret Your$trongEnableSecret

    Switch(config)# exit

    Switch# write memory

This quick configuration step ensures your Catalyst 9300 is locked down from the start.

How to Stack Cisco Catalyst 9300 Switches

Stacking isn’t just for cable management bragging rights — it simplifies management and boosts resiliency in Catalyst 9300 deployments.

Hardware Requirements for Stacking

• Cisco StackWise-480 or StackWise-1T cables
• Compatible Cisco IOS XE software versions across all devices
• Up to eight switches in a single stack

Before stacking, check your configuration guide to ensure you're working with the right models and firmware.

Step-by-Step Stacking Instructions

Proper StackWise cabling connects each switch’s Stack 1 port to the next switch’s Stack 2 port, forming a resilient ring, as shown below

Now, here’s how you stack your Cisco Catalyst 9300 switches step-by-step:

1. Power down all switches.
2. Connect the StackWise cables:
   • Top switch’s Stack 1 port ➔ Next switch’s Stack 2 port
   • Close the ring by connecting the last switch Stack 1 ➔ First switch Stack 2
3. Power everything back on.
4. Confirm the stack is healthy:
   
   Switch# show switch
5. Set switch priorities (the boss switch, aka the active switch, should have the highest):

    Switch# configure terminal

    Switch(config)# switch 1 priority 15

    Switch(config)# switch 2 priority 14

    Switch(config)# exit

    Switch# write memory

Setting a priority ensures that your most important device takes control during failovers.

How to Recover a Lost Password on Catalyst 9300

Locked out of your Cisco Catalyst 9300? No worries — password recovery is simple.

1. Connect your console cable.
2. Power cycle the switch.
3. Hold down the Mode button for 15 seconds when you see the boot sequence.
4. The switch will land in ROMMON mode.

From ROMMON:

    switch: SWITCH_IGNORE_STARTUP_CFG=1

    switch: boot

Once booted:

    Switch# configure terminal

    Switch(config)# username admin password New$ecureP@ssword

    Switch(config)# write memory

Reset the startup config ignore:

    Switch# configure terminal

    Switch(config)# no system ignore-startupconfig switch all

    Switch(config)# exit

    Switch# write memory

A quick reboot later, and you’re back in business.

How to Configure Cisco 9300 Licensing and Software Updates

The Catalyst 9300 relies on Cisco Smart Licensing, and keeping your devices on the latest Cisco IOS XE versions is critical.

Activating Smart Licensing

1. Register your switch with Cisco Smart Software Manager (SSM).
2. Assign the license from your pool.
3. Verify registration:

    Switch# show license summary

If your licensing setup ever feels confusing, Cisco’s configuration guides are a lifesaver.

Installing Software Updates

1. Download the latest .bin file from Cisco’s software site.
2. Transfer the file to your device via TFTP/SCP.
3. Set the boot path:

    Switch# configure terminal

    Switch(config)# boot system switch all flash:your_image.bin

    Switch(config)# exit

    Switch# write memory

    Switch# reload

Upgrading your Cisco IOS XE software ensures your Catalyst 9300 is ready to tackle whatever your network throws at it.

Best Practices for Configuring Catalyst 9300

• Secure it immediately — change passwords, enable SSH, disable Telnet.
• Save early, save often — don’t wait to write memory until it’s too late.
• Configure VLANs and segment traffic — build security at Layer 2.
• Stack devices properly — StackWise makes life easier.
• Backup configurations regularly — preferably off-device via SCP or scheduled automation.
• Monitor your switches — SNMP traps and syslogs keep you ahead of problems.

Common Issues and Troubleshooting Tips

For advanced deployments or compliance-focused networks, Cisco provides a comprehensive security configuration guide tailored for the Catalyst 9300 series. These resources, along with expert support from the Edgeium team, can help ensure that every device and interface is properly configured for long-term performance and security.

Cisco Catalyst 9300 FAQ

Q: What's the default password for a Catalyst 9300?

A: Generally, there isn’t one. Just press Enter at the prompt. Some newer images use a predefined password.

Q: How many Catalyst 9300 switches can I stack?

A: Up to eight per StackWise ring.

Q: How do I reset a 9300 switch to factory defaults?

A: Use the Mode button method during reboot, then erase the startup config.

Q: Do I need a license to run advanced features?

A: Yes. Advanced Layer 3 and DNA features require Smart Licenses and regular software updates.

Final Thoughts

The Cisco Catalyst 9300 isn’t just a switch — it’s the foundation of your future-ready network. But setting up a network that’s built to last isn’t just about hardware — it’s about the right partner, too.

That’s where Edgeium comes in.

We boost your business by helping you create stronger, more reliable networks — all while cutting costs. Whether you need top-quality new or pre-owned Cisco gear, smart CovrEDGE™ maintenance plans, or help recovering your IT investments, we’re ready to help.

👉 Ready to put your network in motion? Let’s Talk and get started.