History of IP TTL in EBGP Sessions
Chris Parker wrote a wonderful blog post going deep into the weeds on how EBGP sessions use IP TTL and why we need multihop EBGP sessions between adjacent devices. However, he couldn’t find a source explaining why early BGP implementations decided to use IP TTL set to one on EBGP sessions:
If there’s a source on the internet that explains when it was decided that EBGP should use a TTL of 1, I can’t find it. I can’t even find it in any RFC. I looked in the RFC for BGP v4, and went all the way back to BGP v1. None of these documents contain the text “TTL or “time to live” or “time-to-live.” It’s not even in the RFC for EGP, back in 1984.
History of IP TTL in EBGP Sessions
Chris Parker wrote a wonderful blog post going deep into the weeds on how EBGP sessions use IP TTL and why we need multihop EBGP sessions between adjacent devices. However, he couldn’t find a source explaining why early BGP implementations decided to use IP TTL set to one on EBGP sessions:
If there’s a source on the internet that explains when it was decided that EBGP should use a TTL of 1, I can’t find it. I can’t even find it in any RFC. I looked in the RFC for BGP v4, and went all the way back to BGP v1. None of these documents contain the text “TTL or “time to live” or “time-to-live.” It’s not even in the RFC for EGP, back in 1984.
Hedge 168: Roundtable
It’s roundtable time! In February’s roundtable, Eyvonne joins Tom and Russ to talk about Network as a Service, innovation, and marketing. Then we jump into the topic of the year at this point—ChaptGPT. Finally, we talk about proposals to eliminate noncompete agreements in the United States. What would this mean? Would it be better for tech, or worse?
As always, you can listen to the show on just about any podcatcher, you can listen right here, or you can download the show to listen later.
Closing the Cybersecurity Talent Gap
Talented cybersecurity professionals are hard to find. Imagination and perseverance can help make the search easier.Day Two Cloud 184: Think Multiplatform, Not Multicloud
Today on Day Two Cloud we put on our thinking caps about platforms, cloud, and multicloud. The last ten years or so has been a push for "cloud-first," but any wholesale approach to "X-first" (cloud, edge, digital, etc.) is problematic. We discuss why. We also explore strategies for CTOs, IT managers, and engineers on how to grapple with cloud strategy, implementation, and operation.
The post Day Two Cloud 184: Think Multiplatform, Not Multicloud appeared first on Packet Pushers.
Day Two Cloud 184: Think Multiplatform, Not Multicloud
Today on Day Two Cloud we put on our thinking caps about platforms, cloud, and multicloud. The last ten years or so has been a push for "cloud-first," but any wholesale approach to "X-first" (cloud, edge, digital, etc.) is problematic. We discuss why. We also explore strategies for CTOs, IT managers, and engineers on how to grapple with cloud strategy, implementation, and operation.The Arrival of AI Networking at Petascale
The AI industry has taken us by storm, bringing supercomputers, algorithms, data processing and training methods into the mainstream. The rapid ramp of large language inference models combined with Open AI's ChatGPT has captured the interest and imagination of people worldwide. Generative AI applications promise benefits to just about every industry. New types of AI applications are expected to improve productivity on a wide range of tasks, be it marketing image creation for ads, video games or customer support. These generative large language models with over 100 billion parameters are advancing the power of AI applications and deployments. Furthermore, Moore's law is pushing silicon geometries of TPU/GPU processors that connect 100 to 400 to 800 gigabits of network throughput with parallel processing and bandwidth capacity to match.
HS041 Intelligent Network Automation With BackBox – Sponsored
We talk a lot about automation and orchestration and how they can change your network strategy and smooth network workflows. But not everybody wants to sit around writing code and building test labs. Greg and Johna talk with Josh Stephens and Chanoch Marmorstein from sponsor BackBox about its network automation software, how it fits into a network operations strategy, and how BackBox focuses on the network engineer.
The post HS041 Intelligent Network Automation With BackBox – Sponsored appeared first on Packet Pushers.
HS041 Intelligent Network Automation With BackBox – Sponsored
We talk a lot about automation and orchestration and how they can change your network strategy and smooth network workflows. But not everybody wants to sit around writing code and building test labs. Greg and Johna talk with Josh Stephens and Chanoch Marmorstein from sponsor BackBox about its network automation software, how it fits into a network operations strategy, and how BackBox focuses on the network engineer.
Network simulators for high-school teachers
Educators in secondary schools, who teach students aged 14 to 18, have unique needs for a network simulator. Most would require a simulator or emulator that offers a web interface so students can access it from a web browser running on a Chromebook or iPad. Ideally, the simulator should enable educators to demonstrate fundamental networking topics without requiring students to spend too much time learning to use the tool or to configure virtual network appliances in the tool.
Most of the projects listed below animate the basic functions of a communications network in a way that is easier for young students to understand. While they may not be interesting to a networking professional, these network simulators solve problems that educators may have.
Free and open-source simulators
The following set of network simulators is free and open source. The first two projects, CS4G and ENS, are available via a web browser. The last open-source project, Filius, is a standalone application that must be installed on a student’s computer.
CS4G Network Simulator
CS4G Netsim is a Web-based network simulator for teaching hacking to high-schoolers. It demonstrates some basic security issues that Internet users should be aware of.
OpenVPN Windows Client with MikroTik
In a previous tutorial, we discussed the configuration of an OpenVPN Server on a Mikrotik […]
The post OpenVPN Windows Client with MikroTik first appeared on Brezular's Blog.
Feedback: Microsoft Azure Networking
Numerous networking engineers found my cloud webinars (AWS, Azure) useful when preparing for a cloud migration project. Here’s what one of them wrote:
We are beginning to migrate some of our offerings to Microsoft Azure and I need to get up to speed with Azure products. I found this webinar very informative, and Ivan explained the concepts in a clear manner and easy to follow along. I would recommend watching these webinars and then read Microsoft documentation to get a thorough understanding.
Want to have some hands-on work sprinkled on top of that? You’ll find deployment examples in the Networking in Public Clouds GitHub repository.
Feedback: Microsoft Azure Networking
Numerous networking engineers found my cloud webinars (AWS, Azure) useful when preparing for a cloud migration project. Here’s what one of them wrote:
We are beginning to migrate some of our offerings to Microsoft Azure and I need to get up to speed with Azure products. I found this webinar very informative, and Ivan explained the concepts in a clear manner and easy to follow along. I would recommend watching these webinars and then read Microsoft documentation to get a thorough understanding.
Want to have some hands-on work sprinkled on top of that? You’ll find deployment examples in the Networking in Public Clouds GitHub repository.