Wi-Fi 7: The Future of High Speed Wireless Networking is Here
Enterprises are under pressure to meet and exceed the challenges of rapidly increasing bandwidth requirements, including AR/VR (augmented reality/virtual reality) applications, streaming multimedia, IoT proliferation, video applications and high density deployments.
CCNA 200-301 Updated To Version 1.1
Cisco is updating the Cisco Certified Network Associate (CCNA) exam to version 1.1. In the past, Cisco only did major updates to their exams. Since then, they have moved to doing more frequent and minor updates, in a more agile fashion. Before going in to the changes, let’s answer some common questions that are covered in Cisco’s FAQ:
Why is the CCNA being updated?
Cisco regularly performs reviews of their exams. Exams get updated to clarify exam topics, introduce new ones, and phase out outdated products and solutions.
What is being added?
New topics include generative AI, cloud network management, and machine learning.
When can candidates register for CCNA v1.1?
Registration begins on August 20, 2024.
What if I’m already studing for CCNA v1.0?
Complete your study and take the CCNA v1.0 exam.
What percentage of the exam is being updated?
Approximately 10% of the exam is updated.
When is the last day to test for CCNA v1.0?
The last day of testing for CCNA v1.0 is August 19, 2024.
So what is being changed? The different domains and their percentages is not changing. The domains and their percentage remain as:
- 1.0 Network Continue reading
Presentation: Introduction to netlab
On April 22nd, I had an Intro to netlab presentation at the wonderful RIPE SEE meeting in Athens.
You can download the presentation or watch it on YouTube. Enjoy ;)
Presentation: Introduction to netlab
On April 22nd, I had an Intro to netlab presentation at the wonderful RIPE SEE meeting in Athens.
You can download the presentation or watch it on YouTube. Enjoy ;)
NB475: Cisco Hypes Hypershield; Broadcom Tries To Clarify VMware Strategy
Take a Network Break! This week we cover Hypershield, a new Cisco security product that uses technology from its Isovalent acquisition. We parse a blog from Broadcom CEO Hock Tan on the company’s VMware strategy, and discuss China’s latest counter-punch in its tech infrastructure fight with the United States. A KPMG survey reveals that executives... Read more »Engineer’s Dilemma: Constant Learning and Forgetting
As a Network Engineer, I've noticed we're in a constantly evolving field. Traditional networking is already a deep pool of knowledge, covering a wide range of topics. But the tech world doesn't stand still – it's moving at a fast pace.
Now, we're not just dealing with routers and switches. We've got a whole new set of skills to learn. There's Cloud, then there's Automation. We're also diving into tools like Ansible, Docker and Terraform and let's not forget Python. With all these new areas to explore, the big question is how do we keep up? How do we learn all these new skills without forgetting the fundamentals that got us here?
Do You Keep Forgetting?
Let me pull out EIGRP as an example. Back when I was studying for my CCNP certification, EIGRP and I were best buddies. I could set up labs, get EIGRP running between them, and troubleshoot any issues that popped up. Ask me about it now. Well, it's a bit embarrassing, but I'd be scratching my head. I remember something about a 'feasible route', but that's about it.
Tech Bytes: Begin Your Unified SASE Journey with Next-Gen SD-WAN (Sponsored)
Secure Access Service Edge, or SASE, combines SD-WAN with cloud-delivered security services including next-gen firewall, CASB, secure web gateway, and others. You can mix and match your SD-WAN and cloud security, but today Rajesh Kari from Palo Alto Networks is here to advocate for the benefits of their single-vendor option. We talk performance, security, and... Read more »Cloud-Native Software: What it Is, How We Got Here, and Why it Matters
To realize the benefits of cloud-native software, an application must actually be cloud-native—designed to run in the cloud, interacting with disaggregated cloud services, fully manageable as code—to deliver the expected benefits.BGP EVPN with VXLAN: Fabric Overview
Figure illustrates the simplified operation model of EVPN Fabric. At the bottom of the figure is four devices, Tenant Systems (TS), connected to the network. When speaking about TS, I am referring to physical or virtual hosts. Besides, The Tenant System can be a forwarding component attached to one or more Tenant-specific Virtual Networks. Examples of TS forwarding components include firewalls, load balancers, switches, and routers.
We have connected TS1 and TS2 to VLAN 10 and TS3-4 to VLAN 20. VLAN 10 is associated with EVPN Instance (EVI) 10010 and VLAN 20 to EVI 10020. Note that VLAN-Id is switch-specific, while EVI is Fabric-wide. Thus, subnet A can have VLAN-Id XX on one Leaf switch and VLAN-Id YY on another. However, we must map both VLAN XX and YY to the same EVPN Instance.
When a TS connected to the Fabric sends the first Ethernet frame, the Leaf switch stores the source MAC address in the MAC address table, where it is copied to the Layer 2 routing table (L2RIB) of the EVPN Instance. Then, the BGP process of the Leaf switch advertises the MAC address with its reachability information to its BGP EVPN peers, essentially the Spine switches. Continue reading
Repost: Campus-Wide Wireless Roaming with EVPN
As a response to my LISP vs EVPN: Mobility in Campus Networks blog post, Route Abel provided interesting real-life details of a large-scale campus wireless testing using EVPN and VXLAN tunnels to a central aggregation point (slightly edited):
I was arguing for VxLAN EVPN with some of my peers, but I had no direct hands-on knowledge of how it would actually perform and very limited ability to lab it on hardware. My client was considering deploying Campus VxLAN, and they have one of the largest campuses in North America.
Repost: Campus-Wide Wireless Roaming with EVPN
As a response to my LISP vs EVPN: Mobility in Campus Networks blog post, Route Abel provided interesting real-life details of a large-scale campus wireless testing using EVPN and VXLAN tunnels to a central aggregation point (slightly edited):
I was arguing for VxLAN EVPN with some of my peers, but I had no direct hands-on knowledge of how it would actually perform and very limited ability to lab it on hardware. My client was considering deploying Campus VxLAN, and they have one of the largest campuses in North America.
Worth Reading: Data Protection for Dummies
Another lovely must-read rant from the cranky security professional.
TL&DR: Data protection requirements like PCI-DSS aren’t there to make companies more secure but to make it too expensive for them to hoard excessive customer data (see also: GDPR).
Worth Reading: Data Protection for Dummies
Another lovely must-read rant from the cranky security professional.
TL&DR: Data protection requirements like PCI-DSS aren’t there to make companies more secure but to make it too expensive for them to hoard excessive customer data (see also: GDPR).
Optimal and Heuristic Approaches to Disjoint Path Routing
To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection. - Henri Poincaré
Disjoint Path routing problems involve finding multiple paths between a source and a destination pair without any shared components. There are different types of disjoint paths, each with specific requirements. For example, link disjoint paths ensure that the paths do not have any common links, while node disjoint paths guarantee that the paths do not share any common nodes. SRLG disjoint paths are another variation, where the paths do not share any common risk groups.
These problems are commonly addressed to ensure network reliability, load balancing, and congestion reduction. The first problem we will examine is the MIN-SUM problem, which aims to determine a set of disjoint routes with the lowest overall cost. To solve this issue, we will look at integer linear programming (ILP). Afterwards, we will explore the MIN-SUM problem in the context of networks with shared risk link groups (SRLGs) and present corresponding solutions.
Basic Disjoint Problem
Let’s say our problem is to find a simple link disjoint paths between a given source and destination. One of the common ways we hear to do in Continue reading
What is platform engineering and when should you invest in it?
As application platforms grow larger, the idea of DevOps teams where developers support the software development lifecycle, but also manage infrastructure and the platform, is beginning to reach the limits of what these teams can support. Rather than taking their best application developers and making them work on infrastructure problems, more organizations are coming to the conclusion that a centralized platform team specialized in that area is a better use of their developers’ skill sets. But what exactly is the platform engineering team and how is it different from the DevOps team? Should your organization invest in platform engineering? Let’s take a closer look.
Platform engineering: What is it and how did it come about?
Platform engineering is essentially building (selecting/standardizing on), operating, and managing the infrastructure that supports 1st- and 3rd-party applications. In the days before cloud-native application development, what we saw was that there was a central team that provided compute infrastructure for enterprise developers to build and host their applications. At a certain point in time, those developers moved to a microservices-based architecture. They didn’t just need virtual machines or servers where they could run their applications; they were building those applications in a containerized form factor, Continue reading
The Final Phase of Digital Transformation Focuses on Data
Modernization of the data domain to include new practices, tools, and technologies is the third phase of digital transformation.HN730: Retail, Healthcare, Manufacturing and More Transform Their Branches with Next-Gen SD-WAN and SASE (Sponsored)
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 »Cross compiling Rust — Fixed
Set up build environment
rustup toolchain install nightly
rustup component add rust-src --toolchain nightly
apt install {binutils,gcc}-mips-linux-gnu
Create test project
cargo new foo
cd foo
Configure linker
mkdir .cargo
cat > .cargo/config.toml
[target.mips-unknown-linux-gnu]
linker = "mips-linux-gnu-gcc"
^D
Build
cargo +nightly build --release -Zbuild-std --target mips-unknown-linux-gnu
Change the “interpreter” to what the Ubiquiti system expects
cd target/mips-unknown-linux-gnu/release
patchelf --remove-needed ld.so.1 foo
patchelf --set-interpreter /lib/ld-musl-mips-sf.so.1 foo
Does it work?
$ ./foo
Hello, world!
Yay!
Links
- https://doc.rust-lang.org/rustc/targets/custom.html
- https://doc.rust-lang.org/cargo/reference/config.html