Book Review: Navigating Network Complexity

From a small number of hosts that are unreachable to large Internet outages, complexity sneaks up and bites network operators, sometimes at the most unexpected and undesirable times. While many mistakes in networks are manual configuration errors, the events of August 30th 2020, served to remind, that automated processes can sometimes propagate a mistake, fast,…

You cannot eliminate complexity for the SAME capability & certainty

The common saying in networking “you cannot eliminate complexity, you can only move it around” are words to live by. Providing insight into the combinatorial complexity in engineering tradeoffs. I find it useful to think about the issue in a slightly modified way “You cannot eliminate complexity for the SAME capability (& certainty)”. Information theory points…

We Automate to Grow: The Past and Future of IP Networks

Imagine a world where IP networks did not have dynamic routing protocols. What would be the alternative? Configuring routes via a management system? Would the network with the best management system have a competitive advantage over other networks? How would that network respond to frequent topology changes? Would there be few networks that operated well,…

As Simple as a Static

Dynamic routing changed the networking landscape in ways that can barely be remembered or articulated. Can anyone really imagine a network such as the Internet, with so many different networks (dare I say “internets”), each with their own administrative entity, and administrative policy, with such a rich “mesh” of connectivity/reachability, emerging as it has, with…

Overall Context For Change in Networking

The¬†Network 2025¬†Article made the following assertion which this article expands on: All of IT has been disrupted by hyperscalers and SaaS. Combined, they have both radically changed customer experience(compared to on-prem software models) and operations excellence(compared to traditional IT models). They have also changed business models. It is in the area of operations excellence that the future…

BGP for Service Layer Migration and Perhaps More

The Important Over the next five years (Network 2025), migration will be top of mind for IP Architects and Engineers, as many networks transition to Segment Routing (SR) for MPLS (SR MPLS), Segment Routing for IPv6 (SRv6), IPv6 (without segment routing), and other migration scenarios in between. BGP-based VPNs support numerous forwarding/data planes, enabling the…

Network 2025 and Beyond

Introduction As I continue to iterate on, and flesh out, the Internet Innovation Stack which I will use as a way of organizing my technologies of interest, networking is a natural area for me to dive in, as it is the area of technology I know the best. A typical way of articulating the future of networking,…

Hot and Hotables: Wha is hot, what could become hot

The Important Many feel their privacy is under attack. There will be technological, entrepreneurial, and public sector responses At a time when the general-purpose CPU had been declared the winner in seemingly all IT domains, specialized silicon is arising: AI/ML, Storage, networking, and more. IT professionals need to learn the principles of the Cloud era…

Ericsson Updates Software Twice a Month, Can Your Software Supplier?

The Important Ericsson has been doing two code drops per month in new 5G networks It is a significant departure from a history of two drops per year New generations of technology are an opportunity to explore many other adjacent technologies, approaches, and cultures Call to Action Every software supplier to CSPs should examine if…

Network Infrastructure: No Rising Tide to Raise All Ships

The Important 50 years on, the Internet, and broadly speaking networking, are a raging success. Network infrastructure growth is often driven by regional, segment, and technology refresh hotspots, leading to inconsistent aggregate growth across the entire market. This dynamic creates management / leadership challenges. There are some broad-based opportunities like SD-WAN and Security. Quick and…