docs: create Work/Nexus-upgrade

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+---
+title: Nexus Upgrade
+description: 
+published: true
+date: 2026-02-19T20:37:32.957Z
+tags: 
+editor: markdown
+dateCreated: 2026-02-19T20:37:32.957Z
+---
+
+# Cisco Nexus C9300GX-CD — NX-OS Upgrade Guide
+
+---
+
+## 1. Pre-Upgrade Checks
+
+### Verify Current Version and Switch Health
+```
+show version
+show module
+show environment
+show logging last 100
+```
+
+### Check Bootflash Space
+Ensure at least 2GB of free space is available:
+```
+dir bootflash:
+```
+
+### Save Your Running Configuration
+```
+copy running-config startup-config
+copy running-config bootflash:backup-config.txt
+```
+
+### Check Upgrade Compatibility
+Verify your current and target NX-OS versions are a supported upgrade path using Cisco's [Nexus 9000 Upgrade and ISSU Matrix](https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/). Some versions require intermediate "stepping stone" upgrades.
+
+---
+
+## 2. Download the NX-OS Image
+
+1. Go to [https://software.cisco.com](https://software.cisco.com) and log in (a valid service contract is required).
+2. Navigate to **Downloads** → **Switches** → **Data Center Switches** → **Nexus 9000 Series**.
+3. Select your target NX-OS release and download the appropriate image (e.g., `nxos64-cs.10.5.4.M.bin`).
+4. Note the **MD5 checksum** listed on the download page for later verification.
+
+---
+
+## 3. Transfer the Image to the Switch
+
+### Option A: Using Windows OpenSSH Server (SCP)
+
+#### Verify OpenSSH Server is Running on Windows
+
+Open PowerShell or Command Prompt and run:
+```
+net start sshd
+```
+Or in PowerShell:
+```powershell
+Start-Service sshd
+```
+
+Confirm the firewall rule exists for port 22:
+```
+netsh advfirewall firewall show rule name="OpenSSH Server (sshd)"
+```
+
+Find your PC's IP address:
+```
+ipconfig
+```
+
+#### Enable SCP Server on the Switch
+```
+feature scp-server
+```
+
+#### Pull the File from the Switch CLI
+From the switch, use the `copy` command to pull the file from your Windows PC:
+```
+ copy scp://Phil@192.168.0.3/C:/Users/Phil.SIL-PC49/Desktop/9300GX/nxos64-cs.10.5.4.M.bin bootflash: vrf management
+```
+
+> **Tip:** If the path is long or contains spaces, move the file to a simple location like `C:\nxos\` first:
+> ```
+> copy scp://YourUsername@192.168.0.x/C:/nxos/nxos64-cs.10.5.4.M.bin bootflash: vrf management
+> ```
+
+
+---
+
+## 4. Verify the Image
+
+Confirm the file is on bootflash:
+```
+dir bootflash:
+```
+
+Verify the MD5 checksum matches what Cisco published:
+```
+show file bootflash:nxos64-cs.10.5.4.M.bin md5sum
+```
+
+---
+
+## 5. Pre-Install Compatibility Check
+
+Run the incompatibility check before upgrading to identify any configuration or feature conflicts:
+```
+show incompatibility-all nxos bootflash:nxos64-cs.10.5.4.M.bin
+```
+
+Review the output carefully and resolve any flagged issues before proceeding.
+
+---
+
+## 6. Perform the Upgrade
+
+### Disruptive Upgrade (Recommended — Requires Maintenance Window)
+The switch will reload. This is the simplest and most reliable method:
+```
+install all nxos bootflash:nxos64-cs.10.5.4.M.bin
+```
+
+### Non-Disruptive ISSU (In-Service Software Upgrade)
+Data plane stays up; control plane resets (~120 seconds). Must confirm version compatibility first:
+```
+install all nxos bootflash:nxos64-cs.10.5.4.M.bin non-disruptive
+```
+
+> The `install all` command performs a final compatibility check and prompts for confirmation before making any changes.
+
+---
+
+## 7. Post-Upgrade Verification
+
+```
+show version
+show module
+show environment
+show interface status
+```
+
+Confirm the new NX-OS version is running and all modules/interfaces are healthy.
+
+---
+
+## 8. Clean Up Old Images (Optional)
+
+Once you have confirmed a successful upgrade, remove the old image to free bootflash space:
+```
+delete bootflash:nxos64-cs.<old_version>.bin
+```
+
+---
+
+## Key Tips
+
+- Always schedule upgrades during a **maintenance window**, even for ISSU, as the C9300GX has a single supervisor.
+- In a **vPC pair**, upgrade the **secondary switch first**, then the primary.
+- Never interrupt power during the upgrade process.
+- Keep a backup of your configuration before starting.