What Causes Internet Outages and How to Prevent Them

Internet outages can be a real nuisance, but understanding what causes them can help you prevent them from happening in the first place. Fiber-optic cable cuts can cause internet outages, as seen in the example of the 2019 outage in California that affected over 900,000 people.

Human error can also lead to internet outages. For instance, a technician's mistake can cause a network failure, as highlighted in the article's discussion of a 2018 outage that occurred due to a faulty switch.

Regular maintenance and updates can help prevent internet outages. By checking for software updates and performing routine checks on your network equipment, you can reduce the risk of an outage.

Power outages are a common reason for internet outages in homes and offices. This is because a power outage can damage cables or equipment, leading to a permanent problem even after the power supply becomes stable.

A power outage upstream from your network connection can also affect your internet connection, even if you have power in your own home or office. This can happen if your internet connection relies on repeater devices installed on telephone poles.

Unstable power supply can cause internet outages by damaging cables or equipment. This can lead to a persisting problem even after the power supply becomes stable.

Just because you have power, it doesn't mean there isn't a power outage upstream from your network connection.

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Network issues are a common culprit behind internet outages. They can be caused by oversubscribing bandwidth across too many users and devices, congesting networks to the point of failure.

Network congestion is a significant issue, especially with the increasing demand for bandwidth and internet traffic. The internet's core protocols, such as TCP/IP and BGP, were designed for reliability and stability rather than optimizing for network congestion.

A sudden surge of traffic, like a DDOS attack, can overwhelm network capacity, leading to congestion and outages. This can happen even if you're paying for a specific rate, but receiving a slower rate service.

Network traffic congestion can be caused by oversubscribing bandwidth, sudden traffic spikes, low bandwidth links, old links that weren't upgraded, and DDOS or broadcast/flooding over the network.

Here are some common causes of network issues:

Internet speed fluctuations can also lead to network interruptions, resulting in slower internet speeds than expected. This can be frustrating, especially when you're paying for a specific rate, but receiving a slower rate service.

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Human errors are a leading cause of internet outages. Misconfigurations can bring down entire systems, and incorrect settings can cause network downtime.

Forgetting to save previous configurations before making changes can also lead to outages. It's surprising how often this simple mistake is made.

Unplugging the wrong cable can be just as problematic. I've seen it happen to even the most experienced network administrators.

Wrong cabling or connections are another common issue. Make sure to double-check your work before plugging in cables.

Mistakes of any form can cause outages. Even the smallest error can have significant consequences.

Here are some common human errors that can lead to internet outages:

Internet outages can be frustrating, but often they're caused by technical issues that are easy to identify and fix. One common reason is equipment failure, which can be due to a partial failure in one of the devices in your network setup, such as a faulty router or modem.

Hardware glitches can also lead to internet outages, and this can be caused by a malfunctioning router, modem, or damaged cables. Routers are responsible for directing network traffic and establishing connections between devices and the internet, so if it fails, you'll lose internet connectivity.

A failed link to your service provider is another common cause of outages, often due to external factors such as thunderstorms, construction work, or animals getting into your cables. Your ISP might be experiencing a vast broadband outage, which can affect your internet connection.

Here are some common hardware issues that can cause outages:

By understanding these common causes of internet outages, you can take steps to prevent them or quickly identify and fix the issue when it occurs.

Equipment failure is often the culprit behind network blackouts. The most common reason for equipment failure is hardware malfunction, which can be caused by a partial failure in one of the devices.

New hardware installations can also lead to equipment failure. If you've recently installed new hardware, it's essential to check for any issues.

A completely dark device in your signal chain will cause an Internet outage, making it an obvious hardware problem. Start by checking your computer, network switch or hub, and router to ensure they're all powered on.

Equipment may not be properly grounded and protected, leading to short circuits and damaging of cables and the modem due to power fluctuations and surges.

Power fluctuations can sometimes cause a problem of "confusion" between switches and modems, leading to network disruption.

Replacing faulty or end-of-life (EOL) equipment with quality, updated hardware can sometimes solve technical issues easily.

Here are some common causes of equipment failure:

Software glitches are a common cause of internet outages, often resulting from manual configuration errors in network devices like routers, switches, and firewalls. These errors can occur due to human error, lack of documentation, or failure to follow best practices during setup or maintenance.

Manual misconfigurations can lead to connectivity issues or complete outages, and software bugs or compatibility issues between different components of the network stack can also cause internet outages.

Software bugs can be introduced through network software and firmware updates, which can inadvertently introduce new bugs or compatibility problems. This can happen if these updates are not thoroughly tested before deployment.

Here are some common software-related issues that can cause network outages:

These issues can be particularly problematic if critical equipment reaches end-of-life with no more software updates available, leaving it vulnerable to failures.

Cyberattacks can severely compromise network security and cause internet service interruptions for businesses.

These malicious activities can overwhelm network resources, disrupt communication channels, and potentially lead to data breaches or system failures.

DDoS attacks involve flooding a network or server with an overwhelming amount of traffic from multiple sources, making it difficult or impossible for legitimate users to access the targeted system or service.

Cyberattacks can effectively shut down websites, cloud services, and other internet-dependent operations, resulting in significant downtime and financial losses for businesses.

Cybercriminals may attempt to infiltrate networks, steal data, or install malware that can disrupt internet connectivity or compromise critical infrastructure.

Cyberattacks can have far-reaching consequences for businesses, not only causing internet outages but also compromising sensitive data, damaging reputations, and incurring substantial recovery costs.

Global enterprises with multiple locations or those operating in critical sectors like finance or healthcare may be particularly vulnerable to the impacts of such attacks.

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Regulatory Compliance can have a significant impact on internet connectivity. Ensuring network operations are resilient is not solely dependent on technology.

A prime example is the disruption of connectivity to China following the forced removal of China Telecom America's network due to national security concerns. This highlights the importance of maintaining a diverse network ecosystem.

Evolving regulations, such as restrictions on specific network providers or regions, can have significant consequences for global businesses. Enterprises relying on those networks can experience internet outages or degraded performance.

Political tensions and geopolitical factors can influence regulatory decisions, creating uncertainties for businesses operating across borders.

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Failed Link to Service Provider can be a major cause of outages. A third party can interrupt the link between your device and server, leading to an outage.

Thunderstorms, construction work, high winds, and even animals or human factors can cause a failed link. These types of outages are more common than those caused by internal equipment failures.

Your ISP might be experiencing a vast broadband outage, which can affect your connection. This is often the case when a failed link to the service provider occurs.

External Factors can significantly impact your internet connection. Weather-related factors like storms, lightning, or heavy rainfall can damage infrastructure and disrupt internet services.

Severe weather events can cause internet outages in several ways, including infrastructure damage, flooding, and power outages. As climate change continues to exacerbate the frequency and intensity of severe weather events, the risk of weather-related internet outages is likely to increase.

Environmental factors can also impact internet services, including weather conditions, physical obstructions, temperature, and humidity. For example, storms, heavy rain, snow, or high winds can damage physical infrastructure like cables, antennas, or satellite dishes, leading to service disruptions.

Here are some common environmental factors that can affect internet services:

Physical obstructions can obstruct wireless signals, reducing the range and quality of internet connections, especially for Wi-Fi networks.

Weather-related factors can significantly impact your internet connection. Severe weather conditions like storms, lightning, or heavy rainfall can damage infrastructure and disrupt internet services for businesses.

Floods, storms, hurricanes, and high winds can cause temporary or permanent disruption of internet connection. This can result in a lost connection, intermittent service, or a slower internet speed due to outdoor equipment damage.

Weather conditions can also cause wire damages as they can get frayed or broken due to extreme heat or cold. Environmental factors like weather, terrain, electromagnetic interference, or physical obstacles can affect different types of internet services differently.

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Here are some common weather-related factors that can impact your internet connection:

It's essential to have a resilient internet service that can withstand such weather-related factors. This can be achieved by having a backup plan, such as a satellite or 5G connection, to ensure continuous internet access.

Bad Peering is a major issue that affects the performance of the internet. It's not just a matter of infrastructure, but also how internet traffic is routed between different networks.

Peering arrangements between ISPs and large network operators, known as Dominant Internet Authorities (DIAs), are primarily driven by cost control rather than optimizing for speed or performance. This means that internet traffic may be routed through suboptimal paths or congested networks.

Internet traffic may be routed through suboptimal paths or congested networks due to the lack of performance-driven approach in peering arrangements. This leads to poor performance and potential outages for businesses.

The lack of a performance-driven approach in peering arrangements means that businesses can experience degraded internet connectivity, even when the underlying infrastructure is functioning correctly. This is a "best effort" scenario, where there's no mechanism in place to dynamically adjust routing paths based on real-time network conditions or user experience metrics.

Peering agreements between DIAs are often inadequate or poorly managed, resulting in inefficient traffic routing and increased vulnerability to network disruptions. This is a major concern for businesses, which rely on fast and reliable internet connectivity to operate.

System Design and Maintenance is a critical aspect of preventing internet outages. A single point of failure in networks can crumble with component failure, leading to extended downtimes.

Traffic congestion often results from suboptimal paths that lack capacity planning. This can be avoided by implementing proper capacity planning.

Insufficient redundancy and backup mechanisms mean that when an outage occurs, the restoration process is delayed. Manual failover, in particular, can be a major bottleneck.

To avoid these issues, it's essential to identify and address potential single points of failure. This includes having backup mechanisms in place where necessary.

Here are some common design issues that can lead to internet outages:

Implementing backup connectivity options can significantly reduce the risk and impact of internet outages. By contracting with multiple Internet Service Providers (ISPs) for diverse routing and physical connectivity paths to the internet, businesses can mitigate the impact of outages caused by a single point of failure.

You can also consider implementing failover mechanisms, such as software-defined wide area network (SD-WAN) solutions, to automatically reroute traffic over available links in case of an ISP outage. This can ensure seamless transition during outages and minimize downtime-related losses.

Some backup connectivity options include 4G/5G cellular or satellite links for critical systems or remote locations. These can be especially useful in areas with limited internet infrastructure or where high-speed connectivity is crucial.

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Here are some key backup connectivity options to consider:

Regularly testing and validating failover procedures can also help ensure a seamless transition during outages. This can help businesses stay vigilant and maintain a competitive edge in an increasingly interconnected global landscape.

Implementing backup connectivity options is a crucial step in preventing the impact of internet outages. By contracting with multiple Internet Service Providers (ISPs) for diverse routing and physical connectivity paths to the internet, businesses can mitigate the risk of a single point of failure.

Having multiple ISPs can provide a safeguard against outages, but it's not enough on its own. Implementing failover mechanisms, such as software-defined wide area network (SD-WAN) solutions, is essential for automatically rerouting traffic over available links in case of an ISP outage.

SD-WAN solutions can help ensure that critical systems and services remain available during outages. Consider backup connectivity options like 4G/5G cellular or satellite links for critical systems or remote locations.

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Backup connectivity options can be a lifesaver in areas with limited internet infrastructure. To ensure seamless transition during outages, it's essential to test and validate failover procedures regularly.

Here are some key backup connectivity options to consider:

Teridion's AI-powered Network as a Service is the only one that utilizes over 25 public cloud providers and 500+ global points of presence to offer reliable connectivity backed by guaranteed network SLAs.

This means that if one cloud provider falls, traffic automatically fails over to the remaining provider networks, creating a highly resilient network fabric that prevents outages.

Teridion's multi-cloud architecture avoids single points of failure, making it a more reliable option for businesses that can't afford downtime.

With Teridion's platform, performance-optimized connectivity is delivered through machine learning, which continuously monitors Internet conditions and makes real-time route selections to overcome issues like poor peering connections and network congestion.

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By dynamically adjusting routing policies as needed, Teridion maintains fast, uninterrupted data flows.

In countries with strict regulations, like China, Teridion has forged strategic alliances with compliant cloud providers and utilizes licensed local infrastructure to ensure adherence to regulations.

This localized approach enables customers to configure and deploy services quickly and flexibly, while also providing optimized connections between any two endpoints.

To minimize internet outages, it's essential to follow best practices for network maintenance. Regularly updating your router's firmware can help prevent outages caused by outdated software.

Failing to update your router's firmware can lead to security vulnerabilities and connectivity issues. Most routers have a built-in update feature, making it easy to stay current.

Power outages can occur due to extreme weather conditions or equipment failure, which can also affect internet connectivity. Having a backup power source, such as a UPS, can help keep your router running during an outage.

Ignoring routine network maintenance can lead to equipment failure, causing internet outages. Regularly checking your router's temperature and cleaning its vents can help prevent overheating issues.

Outdated network equipment can be a major cause of internet outages. Upgrading to newer, more reliable equipment can help ensure a stable internet connection.

Internet outages can be frustrating, but knowing where to start looking can help you identify the cause.

If your internet goes out, start from your computer and work your way back to your router to figure out what's going on.

Sometimes, the culprit might be your ISP, and a call to them might be necessary to get things back up and running.

In those cases, it's not always easy to deal with, but it's a step in the right direction to getting your internet back online.