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Decisions @ Layer 3

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Title of Decisions @ Layer 3: " Decisions @ Layer 3 "

Publisher:  roshanchampika
Message frequency:  0.2 / day

Message History

Centralized vs Distributed Internet Breakout
"Should the internet traffic exit the network at a central DC or directly at the branch?"; is a well known debate among engineers specially when the cloud emerged. Here is the view of an architect for that matter.

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MPLS vs Internet VPN vs SD-WAN - A Decision Framework
When SD-WAN first emerged and became the industry trend, many network engineers quickly declared: “MPLS is dead.” “SD-WAN fixes everything.” But even after a decade, that narrative hasn’t proven true, and it never will. The reason is simple: SD-WAN is not a transport. It is an orchestration layer. MPLS, on the other hand, is a transport service. SD-WAN does not replace MPLS by d...

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Why "No Single Point of Failure” Is Often Misunderstood
Many engineers interpret "no single point of failure" as adding a secondary firewall or adding a secondary ISP or stack the switches or cluster the servers etc etc.. And technically "Yes" they could remove the single point of failure on the diagram, but they may not have removed the failure domain.

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Designing for Maintenance without Downtime
There are some outages caused due to failures.There are a lot of outages caused due to maintenance.

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Active-Standby vs Active-Active: When to Use Each
When planning redundancy, especially in firewall deployments, you typically have two options: Active-Standby or Active-Active. Selecting the right model depends on understanding when each design is appropriate and where it makes the most sense to use it.

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