Network Automation with PowerShell

Overview

This project automates common network administration tasks for Cisco switches using PowerShell. It connects to devices via SSH and executes IOS commands to manage VLANs, gather device information, and generate configuration reports.

The Problem

Managing VLANs across multiple switches manually is:

• Time-consuming: Each switch requires individual console/SSH access
• Error-prone: Manual configuration increases typo risk
• Inconsistent: Hard to maintain standard configurations
• Undocumented: Changes aren't automatically tracked

The Solution

A PowerShell-based automation toolkit that:

# Example: Get VLAN information from all switches
$switches = Import-Csv "switches.csv"

foreach ($switch in $switches) {
    $session = New-SSHSession -ComputerName $switch.IP -Credential $cred
    $vlans = Invoke-SSHCommand -SessionId $session.SessionId -Command "show vlan brief"
    
    # Parse and export VLAN data
    Export-VlanReport -Data $vlans -Switch $switch.Name
}

Features

Inventory Management

• Automatic discovery of connected devices
• Hardware/software version tracking
• Interface status monitoring

VLAN Automation

• Bulk VLAN creation across multiple switches
• Consistent naming conventions
• Automatic trunk port configuration

Reporting

• Daily configuration backups
• Change detection and alerting
• CSV/HTML report generation

Technical Stack

Results

• 80% reduction in VLAN configuration time
• Zero configuration errors since implementation
• Automated daily config backups
• Complete switch inventory always up-to-date

Lessons Learned

1. Error handling is critical - Network devices can be unpredictable
2. Logging everything - Essential for troubleshooting
3. Start small - Automate one task, then expand
4. Test in lab first - Never run untested scripts in production

Next Steps

• [ ] Add SNMP monitoring integration
• [ ] Build web dashboard for reports
• [ ] Implement Ansible for cross-platform support
• [ ] Add automated compliance checking