Introduction

This course focuses on implementing high availability (HA) and resiliency strategies in ArcOS-based enterprise networks. Participants will learn how to design fault-tolerant architectures, deploy redundancy mechanisms, and maintain continuous network operations. The training emphasizes practical best practices, real-world configurations, and troubleshooting techniques to ensure network reliability and minimize downtime in critical enterprise environments.

Prerequisites

• Strong understanding of ArcOS fundamentals and CLI operations

• Knowledge of routing, switching, and network protocols (OSPF, BGP, VLANs)

• Familiarity with enterprise network design concepts

• Optional: Experience with automation, monitoring, and ArcTelemetry

Table of Contents

1. Introduction to High Availability and Resiliency
 1.1 Understanding HA Concepts in Enterprise Networks
 1.2 ArcOS Features Supporting Redundancy
 1.3 Business and Operational Benefits of Resilient Networks

2. Network Redundancy Mechanisms
 2.1 Link Aggregation and Port Channel Failover
 2.2 Redundant Routing and VRRP Implementation
 2.3 Spanning Tree Protocol and Loop Prevention

3. Designing Fault-Tolerant Architectures
 3.1 Leaf-Spine and Multi-Tier Topologies
 3.2 Data Center and Campus Network HA Design
 3.3 Load Balancing and Traffic Optimization

4. Resilient Routing and Switching
 4.1 Dynamic Routing Protocols for HA (OSPF, BGP)
 4.2 Route Reflectors and Route Redundancy
 4.3 VLAN and VRF-Based Network Isolation

5. Monitoring and Predictive Maintenance
 5.1 Using ArcTelemetry for Health and Performance Insights
 5.2 Proactive Fault Detection and Alerting
 5.3 Logging, Auditing, and Event Correlation

6. Automation for High Availability
 6.1 Automating Failover and Recovery Processes
 6.2 Using APIs and Scripts to Maintain Consistency
 6.3 Policy-Based Resiliency and Self-Healing Networks

7. Security and Compliance Considerations
 7.1 Securing Redundant Paths and Devices
 7.2 Access Control for HA Configurations
 7.3 Compliance and Audit Best Practices

8. Case Studies and Best Practices
 8.1 Real-World Enterprise Network HA Deployments
 8.2 Lessons Learned from Network Outages
 8.3 Continuous Improvement Strategies for Resiliency

By the end of this course, participants will be able to design, implement, and manage highly available and resilient ArcOS enterprise networks. They will gain the skills to reduce downtime, optimize network performance, and ensure reliable operations across complex, mission-critical infrastructures.