High-Level and Low-Level Designs

Tailored Network Solutions for Specific Technical Requirements

At Miriquidi Networks, we provide customized high-level and low-level network designs that address the unique technical and operational needs of each client. Whether designing large-scale infrastructures for carriers or smaller, focused solutions for businesses, we ensure that every aspect of the network architecture is meticulously planned and executed to optimize performance, scalability, and reliability.

High-Level Designs (HLD)

A high-level design (HLD) provides a strategic overview of the network architecture. It outlines the overall structure and essential components, focusing on how different parts of the network interact at a conceptual level. This design phase is crucial for aligning network infrastructure with business goals, ensuring scalability, and laying the groundwork for future expansion or technology integration.

Key Elements of High-Level Designs:

Network Architecture Overview: A holistic view of the network’s core components, including data centers, WAN, LAN, and cloud integration.
Technology Selection: High-level decisions on the technology stack (e.g., Nokia SR Linux, Juniper, Infinera, or Smartoptics) and key protocols such as EVPN, VXLAN, and Segment Routing.
Scalability and Growth Planning: Planning for future network expansion, ensuring the design can handle increased traffic, additional users, and new services without major redesigns.
Redundancy and Resilience: Outlining strategies for high availability and failover, including redundancy at critical points and network paths to minimize downtime.
Security Strategy: Defining security zones, firewall placements, and high-level security protocols to ensure data integrity and protection.

A high-level design focuses on providing:

Clarity for Stakeholders: A clear, business-focused overview that helps technical and non-technical stakeholders understand the overall network strategy and objectives.
Roadmap for Implementation: A guide for the detailed technical work that follows in the low-level design phase.

Example of High-Level Design:

In a multi-data center architecture with cloud connectivity, the high-level design would specify:

Data centers and their geographical locations.
Interconnections via VXLAN/EVPN or MPLS, depending on the client’s needs.
Use of BGP for efficient routing between data centers.
High-level security mechanisms, such as inter-data center encryption and perimeter firewall placement.

Low-Level Designs (LLD)

A low-level design (LLD) goes deeper into the technical details of how the network will be built and configured. It translates the strategic HLD into actionable, technical specifications that network engineers use for implementation. This design includes the exact configurations, protocols, device roles, and cabling required to bring the network to life.

Key Elements of Low-Level Designs:

Detailed Device Configuration: Precise configurations for all devices in the network, including routers, switches, firewalls, and load balancers. This includes interface settings, IP addressing schemes, routing protocols (e.g., BGP, OSPF), and VLANs.
Protocol Implementation: Detailed specifications on how network protocols like EVPN, VXLAN, BGP, and Segment Routing are deployed, including the roles of each device in the control and data planes.
Topology Maps and Diagrams: Detailed diagrams showing physical and logical connections between devices, including redundant paths for high availability.
Security Implementations: Specifications for firewalls, access control lists (ACLs), VPN configurations, and encryption settings. These security elements ensure that the network is protected from unauthorized access and cyber threats.
Performance Optimization: Detailed design for QoS (Quality of Service) configurations to prioritize traffic, ensuring that mission-critical applications have the necessary bandwidth and latency guarantees.
Automation and Monitoring Integration: Specification of tools like Ansible for automation and Telemetry/gNMI for real-time monitoring. This includes the integration points for managing device configurations and performance metrics.

Example of Low-Level Design:

In the same multi-data center architecture, the low-level design would specify:

The exact VXLAN/EVPN configuration for each switch and router, including BGP EVPN control-plane settings for interconnecting data centers.
Segment Routing configuration to steer traffic through optimal paths based on real-time network performance.
Nokia SR Linux device configurations for high-performance forwarding, including interface mappings and Layer 3 routing settings.
Security rules defining permitted traffic between specific data centers and cloud services, with encryption standards for sensitive data flows.

How HLD and LLD Work Together

Both high-level and low-level designs are essential in the network design process, and they work together as part of a continuous workflow:

HLD as the Blueprint: The high-level design serves as the architectural blueprint, aligning network goals with business objectives and providing a framework for scalability, security, and performance.
LLD as the Detailed Plan: The low-level design transforms the HLD into actionable, detailed instructions, specifying the configurations, hardware, and connections required for network deployment.

Together, these designs ensure that:

The network meets the client’s technical and operational needs.
Implementation teams have clear, actionable guidelines for deploying the infrastructure.
The architecture is future-proof, capable of handling new technologies or increased demand as the network grows.

Benefits of Our Tailored High-Level and Low-Level Designs

Custom Fit: We tailor our designs to meet your specific business and technical requirements, ensuring that your network is both effective and scalable.
Holistic Approach: By considering both the high-level strategy and the low-level technical details, we create a comprehensive solution that aligns with your long-term business goals.
Efficient Implementation: Our detailed low-level designs make the implementation process straightforward, reducing the risk of errors and ensuring a smooth deployment.
Future-Ready: Our designs anticipate future growth and technological advancements, ensuring your network remains adaptable and scalable.

At Miriquidi Networks, our expertise in both high-level and low-level designs ensures that your network infrastructure is not only aligned with your business goals but also optimized for technical excellence. Whether it’s implementing Nokia SR Linux, designing with EVPN/VXLAN, or optimizing with BGP and Segment Routing, our tailored designs deliver robust, scalable, and future-proof networks.

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