July 11, 2025
When Your East-West Dreams Crash on a North-South Reality
Your application's performance is now decided by networks you don't own. It's time to see the whole picture.
5 min read

Written by: Yann Guernion
Key Takeaways
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You did everything right.
You invested in a sophisticated private cloud platform. You built a pristine, high-performance, and secure environment for your most critical applications. It’s your glass castle—a standardized, automated, and powerful core for your enterprise. Your team can see every virtual machine, every data flow, and every storage transaction within its walls.
And yet, the high-stakes complaints keep coming. A critical business process is timing out, stalling revenue. Customer trust is eroding with every performance lag. Your best engineers are trapped in war rooms, chasing ghosts with disconnected data, and you have a sinking feeling that no one has the complete picture.
The challenge is that your perfect private cloud has become an island, and your applications no longer live solely within its borders.
The new geography of your application
Think about your most important applications today. Are they truly self-contained? Or does your private cloud-hosted CRM need to make an API call to a payment gateway in AWS? Does your core ERP system rely on a data analytics service running in Google Cloud? Does every user first have to authenticate through a third-party SaaS identity provider?
The very definition of “application" has changed. It’s a distributed system, a mesh of dependencies that spans your private cloud, multiple public clouds, and countless SaaS providers. The "application" is now the entire transaction path. Its performance is dictated by the weakest link in that complex chain, and most of that chain exists far outside the walls of your castle.
The east-west dream relies upon a north-south reality
Your architects designed these connections with an east-west mindset. They expect the communication between your private cloud and your AWS microservices to be as seamless and reliable as if they were two servers in the same rack. This is the east-west dream of fast, internal, server-to-server traffic.
The network, however, is forced to enable this dream within a north-south reality. The traffic has to leave your data center, travel across the public internet or a dedicated interconnect, and enter a completely different cloud environment. That pristine, backend communication is suddenly exposed to the unpredictable nature of external networks—the public roads that you don’t own or control and that are full of congestion, latency, and packet loss.
This is the fundamental disconnect. Your business-critical, internal traffic is now dependent on external network performance, and that’s where most network operations teams have zero visibility.
The limits of the X-ray
The native tools you have to monitor your private cloud environment provide an incredible level of internal detail. Think of them as a high-resolution X-ray machine. They can look deep inside your infrastructure and provide you with a comprehensive picture of its internal health. They can tell you with certainty if the problem is, or is not, within your owned environment. This is an essential capability.
But you wouldn't use an X-ray to navigate a cross-country journey. Once that traffic leaves your data center, its journey across the internet and into another cloud provider's network is a complete black box to those tools. They can tell you a connection happened, but they can't tell you anything about the quality of the journey itself. They can't tell you why it was slow or where the packets were lost.
Charting the world beyond the internal team’s control
To solve this, you need more than an X-ray; you need a GPS with real-time traffic data for the entire journey. You need to see the hop-by-hop path from your private cloud environment to that Amazon Virtual Private Cloud (VPC). You need to monitor the latency and stability of that connection, not just when things are broken, but continuously, so you can understand what "normal" looks like.
This is where true network observability comes in. It's about deploying lightweight monitoring points in strategic locations—your data center, VPCs, and even branch offices—and using them to actively measure performance across the networks you depend on but don't own. It’s about getting a definitive answer to the question, "Is it the network?" and if so, pinpointing exactly where.
When you can see that the latency of your payment gateway in AWS just jumped from 40ms to 400ms at a specific ISP peering point, the finger-pointing stops. The argument is over. Your teams can move from defending their turf to collectively solving the problem with actionable data. You can finally hold your providers accountable.
Your path forward
No doubt your private cloud is the perfect foundation. But its value is also defined by its connectivity to the outside world. To truly deliver on the promise of your investment, you must shift your focus from just monitoring the island to mastering the digital supply chain that connects it to your users and services, wherever they may be.
Mastering this new reality begins with seeing it clearly. This requires moving beyond the limitations of traditional tools to embrace a new standard of network observability. To see how leading enterprises are achieving this visibility and transforming their multi-cloud operations from reactive to proactive, explore our e-book, 3 Key Challenges for Monitoring Private Cloud Networks.
Tag(s):
DX NetOps
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AppNeta
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Network Monitoring
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Network Observability
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Network Management
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Multi-Cloud Environments
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Cloud

Yann Guernion
Yann has several decades of experience in the software industry, from development to operations to marketing of enterprise solutions. He helps Broadcom deliver market-leading solutions with a focus on Network Management.
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