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How can you optimize WAN performance for high availability?

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WAN performance is crucial for ensuring high availability of applications and services across distributed networks. However, WANs can face various challenges such as latency, congestion, packet loss, and bandwidth limitations that can affect the quality of service and user experience. In this article, you will learn some practical tips and best practices on how to optimize WAN performance for high availability.

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Cristian Critelli

EMEA Lead Networking & Resilience Specialist Partner Solution Architect at Amazon Web Services (AWS) [ex Microsoft…
Naresh A.

Advanced Network Engineer at Marathon Oil
Cyrus Mwangi

ICT Leadership | Application Security Analyst | CNSS | Senior ICT Support Specialist | Systems Administration |…

1 Assess your WAN needs

The first step to optimize WAN performance is to understand your current and future WAN needs. You should conduct a thorough assessment of your WAN topology, traffic patterns, bandwidth requirements, service level agreements, and performance metrics. You should also identify the critical applications and services that depend on WAN connectivity and prioritize them accordingly. This will help you to determine the optimal WAN design and configuration for your network.

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Naresh A.

Advanced Network Engineer at Marathon Oil
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Optimizing WAN performance for high availability involves several key strategies. Employing a combination of load balancing, link aggregation, and redundancy protocols like HSRP/VRRP enhances network resilience. Implementing Quality of Service (QoS) ensures critical applications receive priority, while WAN optimization techniques such as compression and caching reduce bandwidth usage. Employing SD-WAN technology allows dynamic path selection and application-aware routing, enhancing overall efficiency. Regularly monitoring and analyzing network performance facilitates proactive identification and resolution of potential issues, ensuring continuous high availability.

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2 Choose the right WAN technology

The next step is to choose the right WAN technology that suits your network needs and budget. There are different types of WAN technologies available, such as MPLS, VPN, SD-WAN, and cloud-based WAN services. Each of them has its own advantages and disadvantages in terms of cost, scalability, reliability, security, and performance. You should compare the features and benefits of each option and select the one that meets your WAN goals and expectations.

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Cristian Critelli

EMEA Lead Networking & Resilience Specialist Partner Solution Architect at Amazon Web Services (AWS) [ex Microsoft Azure]
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To optimize WAN performance for high availability, select the right technology—MPLS for predictable performance, SD-WAN for flexibility and intelligence, or dedicated lines for stability. Use redundancy and multiple links to eliminate single points of failure. Apply QoS policies to prioritize critical traffic and deploy WAN optimization tools to enhance data efficiency and reduce latency. Proactive network monitoring is essential to address issues early. In practice, implementing SD-WAN with active-active links and automatic path selection can notably increase both availability and performance, ensuring the network remains robust and reliable even under challenging conditions.

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3 Implement WAN optimization techniques

The third step is to implement WAN optimization techniques that can enhance the efficiency and speed of WAN transmissions. WAN optimization techniques can include compression, caching, deduplication, protocol optimization, traffic shaping, and quality of service. These techniques can reduce the amount of data that travels over the WAN, improve the utilization of bandwidth, minimize the impact of latency and packet loss, and prioritize the most important traffic. You should apply the appropriate WAN optimization techniques for your network environment and monitor their results.

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4 Leverage WAN redundancy and load balancing

The fourth step is to leverage WAN redundancy and load balancing to increase the availability and resilience of your WAN connections. WAN redundancy means having multiple WAN links or paths that can provide backup or failover in case of a WAN outage or disruption. Load balancing means distributing the WAN traffic across multiple WAN links or paths to balance the workload and avoid congestion. You should implement WAN redundancy and load balancing solutions that can detect and route the WAN traffic to the best available WAN link or path.

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5 Monitor and troubleshoot WAN performance

The fifth step is to monitor and troubleshoot WAN performance regularly and proactively. You should use network monitoring tools and software that can collect and analyze WAN performance data, such as bandwidth usage, latency, jitter, packet loss, and availability. You should also set up alerts and notifications that can inform you of any WAN performance issues or anomalies. You should troubleshoot and resolve any WAN performance problems as soon as possible to prevent them from affecting your network operations and user satisfaction.

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6 Review and update your WAN strategy

The sixth step is to review and update your WAN strategy periodically and adaptively. You should evaluate the effectiveness and efficiency of your WAN performance optimization efforts and measure their impact on your network performance and business outcomes. You should also keep up with the latest trends and developments in WAN technology and innovation and consider adopting new solutions that can improve your WAN performance and capabilities. You should revise and update your WAN strategy as your network needs and goals change over time.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Cyrus Mwangi

ICT Leadership | Application Security Analyst | CNSS | Senior ICT Support Specialist | Systems Administration | E-commerce
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To optimize WAN performance for high availability, employ strategies such as load balancing, link redundancy, Quality of Service (QoS), WAN optimization techniques, traffic engineering, application acceleration, network monitoring, security measures, cloud-based solutions, redundant network equipment, backup and disaster recovery, and regular performance testing. These measures aim to ensure efficient and reliable network operation, minimize downtime, and address potential issues proactively.

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How can you optimize WAN performance for high availability?

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3

4

5

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1 Assess your WAN needs

2 Choose the right WAN technology

3 Implement WAN optimization techniques

4 Leverage WAN redundancy and load balancing

5 Monitor and troubleshoot WAN performance

6 Review and update your WAN strategy

7 Here’s what else to consider

Network Engineering

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How can you optimize WAN performance for high availability?

1

2

3

4

5

6

7

1 Assess your WAN needs

2 Choose the right WAN technology

3 Implement WAN optimization techniques

4 Leverage WAN redundancy and load balancing

5 Monitor and troubleshoot WAN performance

6 Review and update your WAN strategy

7 Here’s what else to consider

Network Engineering

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