Introducing IRP Lite 3.11.1
The post Introducing IRP Lite 3.11.1 appeared first on Noction.
Sudan’s exam-related Internet shutdowns
To prevent cheating in exams many countries restrict or even shut down Internet access during critical exam hours. I wrote two weeks ago about Syria having planned Internet shutdowns during June, for exams.
Sudan is doing the same thing and has had four shutdowns so far. Here's the Internet traffic pattern for Sudan over the last seven days. I've circled the shutdowns on Saturday, Sunday, Monday and Tuesday (today, June 22, 2021).
Cloudflare Radar allows anyone to track Internet traffic patterns around the world, and it has country-specific pages. The chart for the last seven days (shown above) came from the dedicated page for Sudan.
The Internet outages start at 0600 UTC (0800 local time) and end three hours later at 0900 UTC (1100 local time). This corresponds to the timings announced by the Sudanese Ministry of Education.
Further shutdowns are likely in Sudan on June 24, 26, 27, 29 and 30 (thanks to Twitter user _adonese for his assistance). Looking deeper into the data, the largest drop in use is for mobile Internet access in Sudan (the message above talks about mobile Internet use being restricted) while some non-mobile access appears to continue.
That can be seen by looking Continue reading
Unexpected Interactions Between OSPF and BGP
It started with an interesting question tweeted by @pilgrimdave81
I’ve seen on Cisco NX-OS that it’s preferring a (ospf->bgp) locally redistributed route over a learned EBGP route, until/unless you clear the route, then it correctly prefers the learned BGP one. Seems to be just ooo but don’t remember this being an issue?
Ignoring the “why would you get the same route over OSPF and EBGP, and why would you redistribute an alternate copy of a route you’re getting over EBGP into BGP” aspect, Peter Palúch wrote a detailed explanation of what’s going on and allowed me to copy into a blog post to make it more permanent:
Unexpected Interactions Between OSPF and BGP
It started with an interesting question tweeted by @pilgrimdave81
I’ve seen on Cisco NX-OS that it’s preferring a (ospf->bgp) locally redistributed route over a learned EBGP route, until/unless you clear the route, then it correctly prefers the learned BGP one. Seems to be just ooo but don’t remember this being an issue?
Ignoring the “why would you get the same route over OSPF and EBGP, and why would you redistribute an alternate copy of a route you’re getting over EBGP into BGP” aspect, Peter Palúch wrote a detailed explanation of what’s going on and allowed me to copy into a blog post to make it more permanent:
Baselining and DHCP (Sort of)
As part of my baselining series, I am covering the various topics or protocols to look for. In this example I have a PC bootup trace file that you can take using a span port or tap.Tech Bytes: Batteries Plus Powers Its Branches With Fortinet SD-WAN (Sponsored)
Today's Tech Bytes podcast is an interview with Fortinet customer Batteries Plus, a retailer that specializes in batteries, chargers, and lighting, about its SD-WAN and SD-Branch deployments. Fortinet is our sponsor for this episode.
The post Tech Bytes: Batteries Plus Powers Its Branches With Fortinet SD-WAN (Sponsored) appeared first on Packet Pushers.
Tech Bytes: Batteries Plus Powers Its Branches With Fortinet SD-WAN (Sponsored)
Today's Tech Bytes podcast is an interview with Fortinet customer Batteries Plus, a retailer that specializes in batteries, chargers, and lighting, about its SD-WAN and SD-Branch deployments. Fortinet is our sponsor for this episode.A Well-Defined API is Layer 8
Protocol (noun): a set of rules governing the exchange or transmission of data between devicesNetwork Break 338: Breach In Progress? Gigamon Operators Are Standing By; IEEE Finalizes New Ethernet Standard
Gigamon adds a human touch to a new SaaS NDR offering, the IEEE finalizes 802.3cu for faster speeds over single-mode optical fiber, US service providers roll out managed SASE services, and more IT news in this week's Network Break podcast.Network Break 338: Breach In Progress? Gigamon Operators Are Standing By; IEEE Finalizes New Ethernet Standard
Gigamon adds a human touch to a new SaaS NDR offering, the IEEE finalizes 802.3cu for faster speeds over single-mode optical fiber, US service providers roll out managed SASE services, and more IT news in this week's Network Break podcast.
The post Network Break 338: Breach In Progress? Gigamon Operators Are Standing By; IEEE Finalizes New Ethernet Standard appeared first on Packet Pushers.
The Week in Internet News: Biden Warns Putin About Some Cyberattacks
No-go zone: U.S. President Joe Biden told Russian President Vladimir Putin that some types of cyberattacks are off-limits during a meeting at the G7 summit in Switzerland recently, Reuters reports. Destructive attacks by Russian hackers on U.S. critical infrastructure must end, Biden said. It’s unclear if the talk will have much of an effect. Banned […]
The post The Week in Internet News: Biden Warns Putin About Some Cyberattacks appeared first on Internet Society.
Network Analysis 1. Setting up and Getting Started with Batfish in Multivendor Network with Cisco, Arista, and Cumulus.
Hello my friend,
The new year we start with a new topic, which is a configuration analysis of the multivendor networks. We have a passion both to create our own open source tools and to use existing, creating by other teams and project. Today we will start dive in one of such a tool.
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retrieval system, or transmitted in any form or by any
means, electronic, mechanical or photocopying, recording,
or otherwise, for commercial purposes without the
prior permission of the author.
Network analysis as part of automation?
In software development we have a concept called CI/CD (Continuous Integration/Continuous Delivery). In a nutshell, it’s a methodology, which incorporates mandatory testing of configuration (code, software version, etc) before bringing it to production. The main idea behind it is that automated testing and validation will make sure that code is stable and fit for purpose. Automated testing? That’s where the automation comes to the stage.
And automation is something what we are experts in. And you can benefit from that expertise as well.
In our network automation training we follow zero to hero approach, where we Continue reading
Comparing EVPN with Flood-and-Learn Fabrics
One of ipSpace.net subscribers sent me this question after watching the EVPN Technical Deep Dive webinar:
Do you have a writeup that compares and contrasts the hardware resource utilization when one uses flood-and-learn or BGP EVPN in a leaf-and-spine network?
I don’t… so let’s fix that omission. In this blog post we’ll focus on pure layer-2 forwarding (aka bridging), a follow-up blog post will describe the implications of adding EVPN IP functionality.
Comparing EVPN with Flood-and-Learn Fabrics
One of ipSpace.net subscribers sent me this question after watching the EVPN Technical Deep Dive webinar:
Do you have a writeup that compares and contrasts the hardware resource utilization when one uses flood-and-learn or BGP EVPN in a leaf-and-spine network?
I don’t… so let’s fix that omission. In this blog post we’ll focus on pure layer-2 forwarding (aka bridging), a follow-up blog post will describe the implications of adding EVPN IP functionality.
Worth Reading: Machine Learning Deserves Better Than This
This article is totally unrelated to networking, and describes how medical researchers misuse machine learning hype to publish two-column snake oil. Any correlation with AI/ML in networking is purely coincidental.
Worth Reading: Machine Learning Deserves Better Than This
This article is totally unrelated to networking, and describes how medical researchers misuse machine learning hype to publish two-column snake oil. Any correlation with AI/ML in networking is purely coincidental.