No Accident BGP is used for VPNs

Border Gateway Protocol (BGP) is used in many roles. So many, that some worry about the impact on Internet stability. The distribution of flowspec rules by BGP that was implicated in the recent Centurylink outage was a reminder to some of that potential, notwithstanding a hopefully fully understanding of the outage in the future. Most…

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,…

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,…

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,…

IP Traffic Engineering & the Automation Dividend

If we think of traffic engineering (TE) as the real-time to long-term mechanisms for networks achieving performance objectives & customer SLAs, in the presence of network failures & topology changes, then we might assert there are three forms of TE: Throw huge amounts of bandwidth at it Throw less bandwidth at it and have a light-weight approach…

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…

Oh, pandemics, that’s why we need ubiquitous broadband!

I get it, COVID-19 is now going to become everyone’s pet excuse for funding. Everyone will be lining up at the government trough for their favorite cut of pork. However, I would argue ubiquitous 5G, that we can trust, is a critical national/global priority. Global shutdowns have pushed the conversation way past the historical debates…