Resources For You

  1. 5 Essential Marketing Strategies for VoIP Businesses

    5 Essential Marketing Strategies for VoIP Businesses

  2. 5 Technologies Set to Revolutionise Webphones

    5 Technologies Set to Revolutionise Webphones

  3. 5 Unique Types of VoIP Gateways Explained!

    5 Unique Types of VoIP Gateways Explained!

  4. 5 Ways a Cloud PBX System Benefits Remote Work

    5 Ways a Cloud PBX System Benefits Remote Work

  5. 5 Ways SBCs Facilitate Unified Communications as a Service

    5 Ways SBCs Facilitate Unified Communications as a Service

  6. 5 Ways to Optimise ASR To Grow Profitability

    5 Ways to Optimise ASR To Grow Profitability

  7. 7 Additional Important Components of a VoIP Carrier Network Explained

    7 Additional Important Components of a VoIP Carrier Network Explained

  8. 7 Important Factors to Consider When Implementing LCR

    7 Important Factors to Consider When Implementing LCR

  9. 7 Ways to Optimize AHT

    7 Ways to Optimize AHT

  10. 9 Key Functions of an SBC Explained

    9 Key Functions of an SBC Explained

  11. 10 Factors to Consider While Choosing a Webphone

    10 Factors to Consider While Choosing a Webphone

  12. 10 Important Components of a VoIP Carrier Network Explained

    10 Important Components of a VoIP Carrier Network Explained

  13. 10-Point Security Checklist for VoIP Carriers

    10-Point Security Checklist for VoIP Carriers

  14. 10 Tips For Effective Implementation of LCR

    10 Tips For Effective Implementation of LCR

  15. 10 Webphone Features that Benefit Your Business

    10 Webphone Features that Benefit Your Business

  16. An Out of the Box Telecoms Network

    An Out of the Box Telecoms Network

  17. Are Call Centers Still Relevant in 2023?

    Are Call Centers Still Relevant in 2023?

  18. Automated Dialler vs Manual Dialler - Knowing the 7 Key Differences

    Automated Dialler vs Manual Dialler - Knowing the 7 Key Differences

  19. Call Center vs Contact Center - Understanding the Differences

    Call Center vs Contact Center - Understanding the Differences

  20. Choosing SIP over TCP,TLS and UDP in 2022

    Choosing SIP over TCP,TLS and UDP in 2022

  21. Class 4 Softswitch vs Class 5 Softswitch - Understanding the Difference

    Class 4 Softswitch vs Class 5 Softswitch - Understanding the Difference

  22. Combatting Covid-19 with Carrier-Grade Communications Solutions to Help Users Work Remotely

    Combatting Covid-19 with Carrier-Grade Communications Solutions to Help Users Work Remotely

  23. Comprehensive Cloud Softswitch Documentation

    Comprehensive Cloud Softswitch Documentation

  24. ConnexCS expands AnyEdge SIP Load Balancer to India

    ConnexCS expands AnyEdge SIP Load Balancer to India

  25. ConnexCS for Africa

    ConnexCS for Africa

  26. ConnexCS WebPhone SDK Connector

    ConnexCS WebPhone SDK Connector

  27. Discover the Different Types of NAT: An Essential Guide for Network Administrators

    Discover the Different Types of NAT: An Essential Guide for Network Administrators

  28. Discussing the Future and Top 9 Benefits of WebRTC

    Discussing the Future and Top 9 Benefits of WebRTC

  29. DNO And DNC Lists - Everything Carriers Should Know

    DNO And DNC Lists - Everything Carriers Should Know

  30. Email and SMS Alerts

    Email and SMS Alerts

  31. Employers' Guide to Winning at Remote Work

    Employers' Guide to Winning at Remote Work

  32. Exploring the Top 10 Types of Web Phones in 2023!

    Exploring the Top 10 Types of Web Phones in 2023!

  33. False Answer Supervision Detection - The Ultimate Tool for Preventing VoIP Fraud

    False Answer Supervision Detection - The Ultimate Tool for Preventing VoIP Fraud

  34. Far-End NAT Traversal - An In-Depth Guide

    Far-End NAT Traversal - An In-Depth Guide

  35. Feature Releases for June 2024

    Feature Releases for June 2024

  36. From Cost Savings to Mobility - 15 Benefits of Web Phones for Businesses

    From Cost Savings to Mobility - 15 Benefits of Web Phones for Businesses

  37. Get Your FCC Registration Number in 5 Easy Steps!

    Get Your FCC Registration Number in 5 Easy Steps!

  38. How to Build Your API on ConnexCS

    How to Build Your API on ConnexCS

  39. How to Build Your Own Dialer (BYOD) – Part 1

    How to Build Your Own Dialer (BYOD) – Part 1

  40. How to Establish a VoIP Interconnect in 10 Easy Steps

    How to Establish a VoIP Interconnect in 10 Easy Steps

  41. How to Get Operating Company Number (OCN) in 4 Easy Steps

    How to Get Operating Company Number (OCN) in 4 Easy Steps

  42. How to Identify Robocall Scam Traffic - A Comprehensive Guide for Telecom and VoIP Operators

    How to Identify Robocall Scam Traffic - A Comprehensive Guide for Telecom and VoIP Operators

  43. How to Improve CX? Ensure your Call Center Agents are Happy!

    How to Improve CX? Ensure your Call Center Agents are Happy!

  44. How to Prepare for a VoIP Network Security Audit

    How to Prepare for a VoIP Network Security Audit

  45. How to Properly Prepare for Setting up a VoIP Interconnect

    How to Properly Prepare for Setting up a VoIP Interconnect

  46. How to Register for the Robocall Mitigation Database: A step-by-step guide!

    How to Register for the Robocall Mitigation Database: A step-by-step guide!

  47. How to Successfully Implement LCR is 5 Easy Steps

    How to Successfully Implement LCR is 5 Easy Steps

  48. How Using Web Phones Can Benefit These 10 Industries?

    How Using Web Phones Can Benefit These 10 Industries?

  49. Importance of Balancing Cost Minimization and Reliable Call Quality when implementing LCR

    Importance of Balancing Cost Minimization and Reliable Call Quality when implementing LCR

  50. Introducing ConnexCS WebPhone

    Introducing ConnexCS WebPhone

  51. Introducing ConneXML - The Best TwiML Alternative

    Introducing ConneXML - The Best TwiML Alternative

  52. Introducing Smart CLI Select - An Effective Way to Improve your ASR

    Introducing Smart CLI Select - An Effective Way to Improve your ASR

  53. LTE vs VoLTE: Diving Into The Differences

    LTE vs VoLTE: Diving Into The Differences

  54. Operating Company Numbers (OCN) - Understanding Function, Importance and Relevance

    Operating Company Numbers (OCN) - Understanding Function, Importance and Relevance

  55. Populating Our Support Area With Cloud Softswitch Video Guides

    Populating Our Support Area With Cloud Softswitch Video Guides

  56. Predictive Dialler vs Progressive Dialler - Understanding the Differences

    Predictive Dialler vs Progressive Dialler - Understanding the Differences

  57. Preview Dialler vs Power Dialler - Understanding Top 5 Differences

    Preview Dialler vs Power Dialler - Understanding Top 5 Differences

  58. Rate Card Profit Assurance

    Rate Card Profit Assurance

  59. Redundant Redundancies (Backups of backups)

    Redundant Redundancies (Backups of backups)

  60. Revolutionise Your Outbound Calls - 8 Types of VoIP Diallers Explained

    Revolutionise Your Outbound Calls - 8 Types of VoIP Diallers Explained

  61. Scalability – Grow at Speeds That Suit You

    Scalability – Grow at Speeds That Suit You

  62. ScriptForge – Javascript Routing

    ScriptForge – Javascript Routing

  63. Simplifiying our Softswitch Pricing

    Simplifiying our Softswitch Pricing

  64. SIP 101 - The Best Guide of 2022

    SIP 101 - The Best Guide of 2022

  65. The 3CX Supply Chain Attack - Understanding Everything That Happened

    The 3CX Supply Chain Attack - Understanding Everything That Happened

  66. The 5 Best Strategies for Mitigating Robocall Scams

    The 5 Best Strategies for Mitigating Robocall Scams

  67. The Anatomy of Robocall Scams

    The Anatomy of Robocall Scams

  68. The Art of Cost Optimization - Least Cost Routing and Its 7 Benefits

    The Art of Cost Optimization - Least Cost Routing and Its 7 Benefits

  69. The Best Multi-POP Cloudswitch

    The Best Multi-POP Cloudswitch

  70. The Essential Guide to Business Continuity Plans for VoIP Carriers

    The Essential Guide to Business Continuity Plans for VoIP Carriers

  71. The Essential Guide to Implementing STIR/SHAKEN

    The Essential Guide to Implementing STIR/SHAKEN

  72. The Ultimate Guide to STIR/SHAKEN

    The Ultimate Guide to STIR/SHAKEN

  73. Timeout Protections (SIP Ping, SST)

    Timeout Protections (SIP Ping, SST)

  74. TLS and 2FA Security on the ConnexCS Platform

    TLS and 2FA Security on the ConnexCS Platform

  75. Top 5 Alternative Marketing Strategies for VoIP Businesses

    Top 5 Alternative Marketing Strategies for VoIP Businesses

  76. Top 5 Call Center Challenges and How To Overcome Them

    Top 5 Call Center Challenges and How To Overcome Them

  77. Top 5 Important Types of VoIP Gateways Explained

    Top 5 Important Types of VoIP Gateways Explained

  78. Top 7 Strategies For Ensuring Call Quality While Minimizing Costs with LCR

    Top 7 Strategies For Ensuring Call Quality While Minimizing Costs with LCR

  79. Top 9 Indicators that Help You Identify a Bad Carrier

    Top 9 Indicators that Help You Identify a Bad Carrier

  80. Top 10 Points of Differences Between a Traditional and VoIP Carrier

    Top 10 Points of Differences Between a Traditional and VoIP Carrier

  81. Top 10 Types of Robocall Scams Explained!

    Top 10 Types of Robocall Scams Explained!

  82. Top 10 VoIP Vulnerabilities You Must Know About

    Top 10 VoIP Vulnerabilities You Must Know About

  83. Understanding Global RTP Servers (Lowest Latency Possible, High Availability)

    Understanding Global RTP Servers (Lowest Latency Possible, High Availability)

  84. Understanding Network Address Translation (NAT) - A Beginner's Guide

    Understanding Network Address Translation (NAT) - A Beginner's Guide

  85. Understanding the 9 Key Objectives of a VoIP Network Security Audit

    Understanding the 9 Key Objectives of a VoIP Network Security Audit

  86. Understanding the Complete Scope of a VoIP Network Security Audit

    Understanding the Complete Scope of a VoIP Network Security Audit

  87. Understanding the Crucial Role of Session Border Controllers in Carrier-Grade VoIP Networks

    Understanding the Crucial Role of Session Border Controllers in Carrier-Grade VoIP Networks

  88. Understanding VoIP Anycast Load Balancing

    Understanding VoIP Anycast Load Balancing

  89. Understanding What a PBX System is and How it Benefits Your Business

    Understanding What a PBX System is and How it Benefits Your Business

  90. VoIP Carrier Network Components - Understanding Session Border Controllers

    VoIP Carrier Network Components - Understanding Session Border Controllers

  91. VoIP Carrier Network Security - How to Conduct Security Audit?

    VoIP Carrier Network Security - How to Conduct Security Audit?

  92. VoIP Carrier's Ultimate Guide to Cleaning Up Their Traffic

    VoIP Carrier's Ultimate Guide to Cleaning Up Their Traffic

  93. VoIP Interconnects - Learning How VoIP Carrier Connect and Exchange Traffic

    VoIP Interconnects - Learning How VoIP Carrier Connect and Exchange Traffic

  94. VoLTE - An Evolution in Voice Communication

    VoLTE - An Evolution in Voice Communication

  95. WebPones Explained: Understanding Web-Based Telephonic Communication

    WebPones Explained: Understanding Web-Based Telephonic Communication

  96. WebRTC 101 - The Best Guide for Beginners

    WebRTC 101 - The Best Guide for Beginners

  97. What Are SIP Traces - A Beginners Guide

    What Are SIP Traces - A Beginners Guide

  98. What Are The Top 10 Essential Call Center KPIs?

    What Are The Top 10 Essential Call Center KPIs?

  99. What Are VoIP Gateways and How Do They Work? A Comprehensive Guide

    What Are VoIP Gateways and How Do They Work? A Comprehensive Guide

  100. What is a Contact Center and Why Does Your Business Need One?

    What is a Contact Center and Why Does Your Business Need One?

  101. What is Robocall Mitigation Database? A Guide for Carriers and VoIP Operators

    What is Robocall Mitigation Database? A Guide for Carriers and VoIP Operators

Understanding VoIP Anycast Load Balancing

Servers sit at the core of VoIP’s switching and media transfer function. Monitoring and managing these servers efficiently is necessary for any VoIP service provider.

While servers run like clockwork at most times, they run into hurdles now and then. This could affect your ability to provide a seamless customer experience.

A sudden surge of traffic, traffic mismanagement, DoS or DDoS attack, etc. can be among the multiple reasons for a server to be overloaded.

An overloaded server loses the ability to operate at its peak performance and in extreme circumstances may even shut down.

Avoiding such incidents is a top priority for any VoIP service provider. This can easily be achieved with the help of an AnyCast Load Balancer.

Let us clear the basics before we get on with our main topic!

What is Load Balancing?

Load balancing is the process of distributing workload properly among the cloud-based VoIP servers and carefully managing the traffic to ensure maximum server availability and performance.

Load balancing allows VoIP service providers to efficiently route traffic to multiple servers while minimizing server load and ensuring minimal disruptions in service.

A load balancer monitors server capacity and incoming traffic in real-time. When the incoming traffic to a particular server increases, the load balancer will divert a portion of this traffic to another server to not overwhelm the initial server.

VoIP Load Balancing

Load balancing ensures the entire network functions at an optimal level and no server is overburdened with workload which may lead to a system failure.

A service provider can drastically reduce operational costs and minimize server downtime and maintenance.

Load balancers can be a single point of failure for the network, so they can be deployed with active and standby. However this does not tollerate datacenter or provider failures too well, so we have to do something even better if we want more uptime

Let us learn more about these!

What is Anycast?

Anycast is a network addressing and routing methodology that allows servers based in multiple locations to share a single IP address. The traffic is routed to the nearest server available.

Anycast as a routing method has two benefits:

  1. Network traffic can be distributed between more than 1 entry point.
  2. Network traffic can easily be rerouted to the next nearest server in case of server overload or failure.

Anycast’s selective routing allows the network to deal with sudden traffic surges, local network failures, network congestion, DoS or DDoS attacks, etc.

Anycast Network

Sounds promising, doesn’t it? That raises the question, how does it manage all of this?

Let me answer that!

How does Anycast Load Balancing Work?

To explain this networking methodology in the best way possible, we’re going to consider scenarios where this system shines.

A Sudden Surge in Traffic

There could be multiple reasons why VoIP traffic might surge in a zone suddenly. The holiday season, midnight on New Year’s Eve, meeting hours, etc.

In such instances, having anycast deployed helps. The traffic surge can be distributed to other servers outside of that operational zones easily.

While this might lead to an increase in latency, the increase is minuscule enough that the end users would not notice it.

Thus, we can use Anycast to balance out the traffic load and ensure all servers function optimally and have high availability.

Network Failure or Outage in a Particular Zone

There have been many instances where the entire network of a zone has gone down or suffered a significant failure.

There could be multiple reasons behind this. Government intervention, power grid failure, networking hardware failure, DoS attack, etc. to name a few.

Causes of Network Failure

When a server or multiple servers designated for that zone go down, anycast can stop advertising itself to be available and traffic from that zone can be routed to the next nearest available servers.

Similar to the previous scenario, there will be an increase in latency. However, the service will remain operational despite the servers in that zone being down.

DoS or DDoS Attack

DoS or DDoS attacks generate and route huge amounts of malicious traffic to single or multiple servers. This is done to overload the servers to a point they’re overrun and go down.

When you have an anycast load balancer deployed, the scenario changes. An anycast load balancer that is intelligent can easily detect a DoS or DDoS attack.

When it does detect such an attack it routes the malicious traffic to all available servers in a bet to absorb the attack completely.

If the attack is so large that we can’t vacuum up the traffic, we can blackhole a portion of the internet where the attack is originating nullifying the attack and remain available for legitimate traffic.

By now you understand how Anycast Load Balancing works with these examples. Let us now consider all the internal failure factors that can affect your VoIP service.

5 Common Server Failure Scenarios

Server failures are inevitable. You can take measures to mitigate the possibility but no measure eliminates the chances of a failure.

Before we get to the fix, let us learn about the 5 most common server failure scenarios!

Process Crash

A core process such as DNS, proxy, cache or logging can crash at times. When such a process crash occurs the monitor daemon detects the failure.

As a corrective action, it signals the BIRD to withdraw the BGP routes to the failed process. The traffic is diverted to the next server with the lowest load.

After the routes have been withdrawn, the monitor daemon restarts the server again. It runs checks on the server to ensure it has come up clean.

Once it has been established that the affected server is up and running properly, the daemon signals it to start announcing the routes again.

Server Crash

An entire server crashing is a common occurrence. There are many reasons why a server may crash and when it does the BIRD crashes along with it.

The routers take note of this and route all the BGP routes from that server to the next lowest load server.

The control server within the data centre will attempt to restart the affected server using the IPMI interface. If that fails, the control server puts the server through a power cycle from the PDU.

Once the control server verifies that the affected server is up and running, it restarts the BIRD and reinitiates all the routes to it.

Switch Crash

When a switch fails due to one of the many reasons that might affect it, all routes to the servers behind that switch are withdrawn.

The traffic corresponding to the IPs of those failed servers is routed to the closest data centre. The team maintaining the networks is notified about the switch failure.

The team then attempts to fix the router by either rebooting it or replacing it in case of a hardware failure.

Router Crash

A router crash is similar to a switch crash. Once a router fails, all routes leading to the switches and servers behind it are withdrawn.

The traffic from the data centre affected by the router crash is diverted to the closest low-load data centre.

The network team is notified by internal and external monitors about the router crash. Similar to a switch crash, the team may resort to rebooting the router or replacing it in case of a hardware failure.

Regional Nuclear Conflict

Okay. I know this isn’t a common occurrence around the world but it is always good to be prepared for something like this.

People working in the networking departments of important facilities know how important it is to prepare for such a scenario.

Given the current geopolitical situation, a limited regional nuclear exchange is a possibility. In such a scenario, a data centre in the affected area will be rendered completely unfunctional due to the electromagnetic and radioactive fallout.

When this happens, any traffic handled by that data centre will be routed to the nearest data centre out of the affected zone.

With that, we have covered everything you need to learn about VoIP load balancing.

Conclusion

Like every machine out there, servers, software and hardware running those are bound to fail at one point or another.

While one can add hardware measures and additional server capacity to tackle such issues, those too become singular points of failure.

Anycast load balancing mitigates these risks as it is a routing methodology. It does not require any hardware for implementation and thus eliminates any singular failure points.

When implemented, anycast load balancing can keep your network up and customers happy at all times!

ConnexCS has a perfect AnyCast Load Balancing solution for VoIP Carriers. Click here to know more!