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+# VyOS Deployment with Advanced Configuration
+
+## Overview
+This manual guides the deployment of a VyOS instance in AWS using CloudFormation. The template sets up:
+- VPC with public and private subnets
+- Internet Gateway, Route Tables, ENIs, Security Groups, Elastic IP
+- Configuration via cloud-init
+
+This automated setup ensures a consistent, efficient deployment process.
+
+## Prerequisites
+- **AWS Account**: Permissions to manage VPCs, EC2 instances, etc.
+- **EC2 Key Pair**: Valid SSH key for accessing VyOS.
+- **AWS Console/CLI**: Familiarity with AWS Console or CLI for stack management.
+
+## CloudFormation Template Overview
+
+### Parameters
+
+#### Existing VPC and Subnet Parameters
+For deployment to an existing VPC, provide VPC and Subnet IDs; leave blank for a new VPC.
+- **ExistingVPCId**: (Optional) VPC ID
+- **ExistingPublicSubnetId**: (Optional) Public Subnet ID
+- **ExistingPrivateSubnetId**: (Optional) Private Subnet ID
+
+#### New VPC Parameters
+For a new VPC, specify:
+- **VPCName**: Name of the new VPC
+- **VPCCidrBlock**: CIDR block (e.g., 10.0.0.0/16)
+
+#### Subnet Parameters
+- **PublicSubnetCidr**: CIDR for the public subnet
+- **PrivateSubnetCidr**: CIDR for the private subnet
+
+#### VyOS Instance Parameters
+- **InstanceType**: EC2 instance type (e.g., t3.medium)
+- **KeyName**: Name of EC2 KeyPair
+- **VyOSPublicENIip**: Private IP in the public subnet
+- **VyOSPrivENIip**: Private IP in the private subnet
+- **VyOSBGPASNumber**: BGP ASN for VyOS
+- **DNS1/DNS2**: Primary/Secondary DNS IP
+- **SSHAllowedIP**: CIDR for SSH access (e.g., 192.0.2.0/24)
+- **AmiAlias**: Specify VyOS AMI alias (e.g., `latest` or version `/aws/.../1.4.0`)
+
+#### BGP/VPN Peer Parameters
+- **OnPremPublicIPAddress**: Public IP of on-premise VPN endpoint
+- **OnPremBGPASNumber**: BGP ASN for on-premise endpoint
+
+### Resources
+1. **VPC**: Creates a new VPC or uses an existing one
+2. **Subnets**: Public and private subnets
+3. **Internet Gateway**: For public subnet internet access
+4. **Route Tables**: Routing configuration for traffic between subnets and Internet Gateway
+5. **ENIs**: Elastic Network Interfaces for public and private IPs
+6. **Security Groups**: Public/Private Security Groups
+7. **VyOS Instance**: Configured via cloud-init with specified AMI and instance type
+
+### Conditions
+Conditions determine whether to create a new VPC or use an existing one.
+
+## Deployment Scenarios
+
+### Existing VPC Deployment
+1. In **AWS Console**, go to **CloudFormation** > **Create Stack**
+2. Choose **Upload a template** and select the `.yaml` file
+3. Enter **Stack Details** and existing **VPC/Subnet IDs**
+4. Configure **VyOS Instance Parameters**
+5. Add on-prem VyOS parameters and finish deployment
+6. Confirm **CREATE_COMPLETE** status and retrieve Public IP from **Outputs**
+
+### New VPC Deployment
+1. Follow the steps above but add new **VPC name, CIDR, and Subnet CIDRs**
+2. Complete **VyOS Instance Configuration**
+3. Confirm deployment and retrieve Public IP from **Outputs**
+
+## Access and Management
+Use SSH to connect:
+```bash
+ssh vyos@<VyOS_Public_IP_Address> -i <test-key.pem>
+```
+
+## Common Commands for VyOS Management
+
+- **show configuration commands**: Displays the current configuration.
+- **show interfaces**: Lists all network interfaces and their status.
+- **show ip route**: Shows the IP routing table.
+- **show ip bgp summary**: Summarizes BGP neighbors and sessions.
+- **show vpn ipsec sa**: Displays the status of IPsec Security Associations.
+- **show vpn ike sa**: Shows the status of IKE Security Associations.
+- **show vpn ipsec connections**: Lists current IPsec VPN connections.
+- **show firewall summary**: Summarizes firewall rules and statistics.
+- **show firewall statistics**: Provides detailed firewall statistics.
+
+For additional commands and configurations, refer to the [VyOS Documentation](https://docs.vyos.io/en/sagitta/).
+