Heavy Networking

If you haven’t made the leap from traditional wide area networking to SD-WAN, or perhaps you’re thinking about adding security services to your SD-WAN infrastructure, this episode is for you. Rajesh Kari from Palo Alto Networks joins the show to share customer stories from the front lines of multi-branch businesses’ networks. Industry verticals including retail,... Read more »

With “The Cathedral and the Bazaar” as his guide, Srivats launched Ostinato, his open source project, in 2010. He needed an affordable network traffic generator at his day job, he was passionate enough to build one during his nights and weekends, and end users loved it– it has been downloaded hundreds of thousands of times.... Read more »

To run AI workloads, a network needs thousands of GPUs and those GPUs must operate in sync. If there is congestion or dropped frames, very expensive efforts could be delayed or disrupted. While there are advantages to using Ethernet for AI networking (including engineers well-trained in the protocol and a robust ecosystem), it wasn’t designed... Read more »

Where there are containers, there is networking. Today we dig into the networking that underlies Kubernetes, the open source orchestration platform for container-based applications. Our guest Karim El Jamali takes us through the essential concepts: Nodes, pods, clusters, CNIs, virtual ethernet pairs, ingress controller, eBPF, and service meshes. As container-based applications grow in popularity, it’s... Read more »

Fiserv is one of the largest payment processors in the world, In 2023 it handled more than 35 billion transactions worth $2.03 trillion US dollars. Its network is critical to the business. The organization knew it needed network automation, but early attempts got some things wrong. On today’s Heavy Networking we talk about how Fiserv... Read more »

Matt Horn built a data center network through automation, remotely. This is the future of network engineering. Matt shares how his team did it technically: Terraform, a little Ansible, leveraging pipelines, etc. But he also shares the processes and culture that made it happen: Management and peer buy-in, tight enforcement based on user access, and... Read more »

Today we metaphorically pop open the hood of switches and routers, taking a look at the mechanics of how they work. We cover the three states: configuration, operational, and forwarding. We talk RIB and FIB, along with CAM, TCAM, and MPLS. We also cover line rate, port-to-port latency, and buffers. Whether it’s been awhile since... Read more »

Right now, we have the building blocks for network automation, but we don’t have end-to-end designs or complete systems. It’s like having a bunch of Legos but no instructions for how to build your spaceship. Ryan Shaw, David Sinn, and their colleagues in the Network Automation Forum are tackling this problem. Their goal is to... Read more »

One dark day, Ivan Pepelnjak stopped labbing. He just couldn’t make himself yet again go through assigning addresses, building links, putting devices in place, setting up OSPF, BGP, VXLAN, EVPN, etc. before even being able to start whatever simulation or test he wanted to do. But from that darkness arose netlab. Ivan created netlab to... Read more »

The days of network cowboy heroism are over… or at least they need to be. It’s time for network engineering to grow up and standardize how networks are built. Not only will this make life easier for all of us as we inherit networks when we move from company to company, but it’s the only... Read more »

Yale’s efforts to load-balance RADIUS servers is a case study in system design for resiliency. First, there was a lone, redundant PSN. Next, F5s load balancers entered the picture. Then the network team realized a feature in IOS-XE was the answer… and brought Cisco along the learning journey with them. Hear it all from the... Read more »

Guest Dinesh Dutt introduces his newest creation, SuzieQ. It’s a network observability platform application that has both a free, open source version and an enterprise version. Lightweight, fast, and platform-agnostic, SuzieQ’s use cases include network documentation, troubleshooting, fabric-wide visibility, network refresh and redesign, low/no code validation, audits and compliance, and proactive health checks. Hosts Ethan... Read more »

Remote and hybrid work means network engineers have to grapple with lossy residential networks such as home wireless that your work-from-home folks are using to access company resources. Their Wi-Fi sucks, and so their use of corporate resources sucks. Sure, you’ve got them plumbed into a SASE fabric, but that doesn’t fix their user experience... Read more »

On today’s episode, we discuss networking sources of truth. That’s right, sources of truth, because you’re likely to have more than one depending on your environment and your point of view. On LinkedIn, Ethan Banks quoted someone at the AutoCon0 conference who essentially said that the network itself shouldn’t be used as a source of... Read more »

At AutoCon0 in November 2023, guest Jeremy Schulman delivered a talk from the main stage about delivering network assurance. If the term “network assurance” doesn’t mean anything to you, think about how you prove after an install or a change that the network is doing what it’s supposed to be doing. If you’re doing it... Read more »

At NewYork-Presbyterian Hospital, patients are the priority. That focus on patient care extends to the hospital’s campus network, data center, wireless network, and SD-WAN. These networks are instrumental for delivering medical applications and connecting medical devices. On today’s Heavy Networking, we talk with network architects and engineers at NewYork-Presbyterian about their use of automation to... Read more »

SD-WAN is evolving to encompass more features and capabilities around security, application performance, network visibility, and more. On today’s Heavy Networking, sponsored by Palo Alto Networks, we look at how SD-WAN has transformed from a simple network connectivity solution to a comprehensive networking and security system. We discuss the limitations of legacy branch routers and... Read more »

Welcome to Heavy Networking! On today’s show we’ve got a roundtable conversation on the state of automation in the networking industry. This show was inspired by the recent AutoCon conference, which is a new conference focused specifically on network automation. Ethan Banks and I both attended, as did two our guests, and we’re going share... Read more »

Today we’re talking security, but security you don’t always see. Fortinet, today’s sponsor, has millions of devices in the field. These are real-world devices seeing real-world traffic, all day, everyday. While those devices have a primary protection role, they can also serve as sensors that collect threat signals and feed threat intelligence services that can,... Read more »

Public clouds abstract away much of the nitty-gritty work that goes into provisioning infrastructure, including networking. Application teams can quickly connect resources and deploy applications without having to know much about the plumbing that links everything together. When they compare the public cloud experience to standing up applications in an on-prem data center, the on-prem... Read more »

We continue our Future of Networking series with part two of our conversation with Brad Casemore. Now retired, Brad has participated in the industry as both a technologist and IDC analyst. In this episode we look at the rise of zero trust and what it means for campus networking. We discuss how geopolitics influences IT... Read more »

Cloud environments often have poor visibility and monitoring, and sensitive corporate data can be placed in many different locations – object stores, databases, and so on. Maintaining access control is hard, and managing compliance and governance on that access and data is a real problem. And each cloud has its own proprietary security tools that... Read more »

The Future of Networking series continues with Brad Casemore, who survived multiple decades in the technology sector, including sixteen years as an analyst for IDC. He’s been a longtime observer of networking markets, technologies, and trends. Recently retired from the analyst business, we’ve invited Brad onto the show as a kind of exit interview to... Read more »

AI and machine learning are finally being applied to networking in meaningful ways. On today's sponsored show we talk with Selector about its AIOps platform, which ingests networking logs, flows, configurations, SNMP, and other telemetry to detect patterns, spot problems, and provide contextual insights to help network engineers do their jobs better. We speak with Selector about what it is, how it works, and concrete use cases.

Today’s Heavy Networking is about collaborative automation via GitNops, which applies DevOps principles to networking. That means things like version control, working with sources of truth, operating infrastructure as code, and collaborating on network on changes and updates. GitNops benefits include automation, repeatability, and scalability. We'll dive into GitNops with guest Tom McGonagle.

Today on Heavy Networking we talk about how to get from a handful of Python scripts to a network automation platform that enables a self-service environment and incorporates the checks and governance required to make sure the automation doesn't blow up the network. Our sponsor today is Itential. Itential offers just such a network automation platform. We talk about how Itential makes it happen, including simple and more complex examples.

Today's Heavy Networking is another roundtable episode. We've assembled a group of network engineers to talk about what's on their minds. Topics today include why other IT departments adn end users are quick to blame the network first, and what can be done about it; using Nokia's open-source Containerlab for testing and development work; and why you shouldn't feel left behind when you hear talk about 400G and 800G networks.

Today’s Heavy Networking, sponsored by Palo Alto Networks, discusses Zero Trust Network Access (ZTNA) across the Secure Access Service Edge (SASE). You could think of ZTNA, as VPN evolved and SASE as SD-WAN evolved. Not only do you get an overlay connectivity fabric, but you also get cloud-hosted security services. We talk about how it all works together, the role of client software, Palo Alto Networks' architecture, integrating an IDP, and more.

Today's Heavy Networking covers Pandas. Not the cuddly bears that eat bamboo, but the Python library that makes it easy for you to work with a set of data. Import Pandas at the top of your Python script, follow one of many Pandas tutorials online, and in short order you’ll be able to perform data operations in a spreadsheet-like way. We talk network automation use cases for Pandas with Rick Donato.

Our topic today on Heavy Networking is SD-WAN monitoring at massive scale. Scale can grow quickly with SD-WAN when you account for the underlay, overlays, gateways, endpoints, and more. We talk with sponsor Broadcom about their monitoring platform and dig into a case study with a Broadcom customer providing global IT infrastructure for thousands of their own customers.

On today's sponsored Heavy Networking we talk with Fortinet about how it converges network and security across the breadth of its portfolio. Fortinet is best known for its firewalls, but the company also offers campus and branch switches, has a wireless portfolio, offers SD-WAN and SASE, provides AI-supported operations, and more. We also talk about Fortinet's approach to the branch office that rethinks networking, security, and performance.

Virtual Application Networks, or VANs, are today’s Heavy Networking topic. Our guest is Ted Ross, motive force behind the Skupper.io project. Skupper builds VANs in Kubernetes clusters that are conceptually like a VLAN or VPN, except that all the magic happens at layer 7. Skupper is based on the Advanced Message Queueing Protocol (AMQP), making it effectively a message bus used to interconnect application messages inside of mTLS tunnels running on top of whatever L3 network is available. If you're confused, don't be. We talk it all out, and explain why it's relevant to today's networking pros.

In today's sponsored Heavy Networking we explore new features in Cisco Thousand Eyes, an operational tool based on visibility and observability of public and private network. Thousand Eyes has continued to grow into complex operational areas such AWS Network Path, Webex performance, and integrations with Meraki to help you identify and fix network and application performance problems.

EVPN/VXLAN is our topic on today's Heavy Networking. What is it? What’s it for? Should you deploy it? Since you’ve probably already got a network, how do you add EVPN to it? Do you need special hardware? How does EVPN impact your security design? And what are the fundamentals? Our guest with the answers is IT instructor Tony Bourke.

On today's Heavy Networking we explore network and firewall automation with sponsor BackBox. BackBox has developed a platform that aims to deliver practical automation out of the box. We get under the hood to understand how it works, what it delivers, and how it addresses the challenges of network and security operations.

This week on Heavy Networking we've assembled a roundtable of network engineers to talk about...stuff. Each guest has brought a topic to discuss with the table, so we've got lots of subjects and lots of experiences and opinions. In particular we explore SPB, career advice, getting network automation off the ground, and the joys and perils of self-hosting.

On today's sponsored Heavy Networking we dig into cloud-delivered Secure Web Gateways (SWGs), which help guard end users against Web-based threats and enforce corporate Web access policies. As employees split time between home, office, and who knows where else, and as more applications move online, cloud-based SWGs help connect and protect workers. Our sponsor is Palo Alto Networks.

If you’ve been staring down the barrel of network automation and wonder what the proper approach might be, today’s episode is for you. The Packet Pushers chat with Tony Bourke about what network automation tools and techniques have become the default standard, how to prepare your network and team for automation, and how to get started.

On today’s Heavy Networking podcast, we look at how sponsor ZPE Systems is rethinking Out-Of-Band management for automated, NetOps-driven infrastructure. This includes tasks like device staging, deployments, upgrades, and more. And you don’t just have to take ZPE’s word for it; we also talk to a customer who’s using the products to run a retail business with a lean networking team that supports more than fifty sites.

On today’s Heavy Networking we talk LACP and link aggregation. While bonding two or more links together to act as a single virtual link has been done for decades, LACP and link aggregation aren't the same thing, and the distinction matters. Our guest to get into the differences is network instructor Tony Bourke.

Certifications are a part of life in IT. On today's Heavy Networking we explore preparation strategies with guest Mary Fasang. Her certs run the gamut from CompTIA to MCSE to the CCNP, as well as the PMP and ITIL certs. How should you prepare for a cert in 2023 when there’s so much content, so many training options, as well as home labbing available? How do you handle failure? Which certs have been the hardest? What study materials have proved helpful? Mary shares her strategies.

Packet-level fundamentals are essential for network engineers to be able to diagnose and solve network and application problems. On today's Heavy Networking, we dive into the transport layer and packets with packet analysis expert and instructor Chris Greer.

Its about reducing the cost and complexity of DWDM coherent optical networks. Connecting the DWDM network directly to your router removes the DWDM edge equipment which simplifies operation, reduce cost,space & power while improving provisioning time. How is Juniper entering this market and what do you need to know ?

Today we’re going deep on software-defined networking for containers and OpenStack with sponsor Juniper Networks. Juniper has revamped its approach to secure networking for telcos and telco cloud-delivered services with Juniper’s Cloud-Native Contrail Networking or CN2 software. CN2 lets you automate the creation of network connections for containers and for virtual machines while also providing routing, security, segmentation and isolation of workloads. Our guest and guide into the guts of Cloud-Native Contrail Networking, hereafter referred to as CN2, is Nick Davey. Nick is Director of Product Management for SDN and Telco Cloud technologies.

Remote operation of infrastructure has renewed importance in the era of remote working. Opengear offers secure, zero trust and segmented methods to reach serial & LAN ports plus GUI interfaces. You can add observability agents like Thousand Eyes into containers so that your worst day becomes just another day.

By some estimates, 50 to 70 million tons of e-waste is generated every year, and that number is growing. When sent to landfills to be buried or burned, e-waste can leach toxic chemicals into soil and air. On today’s Heavy Networking, we’ll look at options for responsible disposal of IT gear, including repurposing it on site, reselling or donating it, and working with e-cycling companies.

On today’s Heavy Networking we have a conversation about monitoring, visibility, and observability with sponsor Palo Alto Networks. More specifically we’ll dig into Palo Alto Networks’ Autonomous Digital Experience Management, or ADEM product, and how Palo Alto Networks is integrating ADEM with AIOps.

If you’ve shied away from network automation because you’re a network engineer not a coder, fear not. There are network automation approaches that can help you get needful work done and don’t require a computer science degree. On today's Heavy Networking we talk with sponsor BackBox about its practical approach to network automation and dive into use cases including network OS backups and compliance.

Modern F1 racing is bathed in data. Real-time vehicle telemetry. In-car video feeds. More video from camera crews and drones. Live streaming. All of this and more needs a network. On today's Heavy Networking we speak with Formula 1's David Ramsden, Senior Network Engineer; and Lee Wright, Head of IT Operations, to get the inside track on building the networks that support F1 races.

It's common for SD-WAN vendors to offer monitoring as part of the solution, but leaves the question … how do I monitor the rest of the network? Today’s sponsor Broadcom offers digital experience monitoring that is independent of the underlying WAN infrastructure. We explore how it works with guest is Jeremy Rossbach, Chief Technical Evangelist, NetOps by Broadcom.