Post mortem of yesterday's outage. TLDR: An assumption in a SQL query caused duplicated entries, which are shared in a file that is distributed and used by a Bot system. This Bot system has a limit (memory), that was exceeded causing a panic in Rust. blog.cloudflare.com/18-november-...

Another #TalesFromTheTechCrypt That moment when you apply a new ACL to a remote device... followed by the cold panic when your SSH session vanishes and won't come back. 🥶 Don't worry, the 3-hour drive to the data center will give you plenty of time to remember the `reload in 5` command next time.

The timing for this mail was spot on, considering that October is the #cybersecurity awareness month. My vault seems to be hacked, according to the h[u]shicorp team. Good thing I don't even have a vault. Another example is to swap rn for m very common for Microsoft. #CiscoDevNet

Great event we are planning for #WebSummit we will talk about networking, observability, AI and more importantly have some good time

Unfortunately I've been of that group, but I guess that's how you get real world experience

Wow, this new impressive the specs of the new Cisco 8223, 51.2 Tbps. 3RU, Fixed. 64 QSFP-DD 800G! I still remember when 100G was huge. But what caught more my eye, it supports SONiC, with XR planned! blogs.cisco.com/sp/cisco-sil... #CiscoDevNet

I want to share this video I made. I created a MCP server for Cisco Live. I wanted to practice with gNMI, so I took it as a opportunity to create gNMIBuddy, an over-engineered gNMI collector for LLM. It has a CLI and MCP interfaces. On this video I share my lessons learned. youtu.be/ealNsG2YkEs?...

Simple things like this that just work are what I enjoy. Just copy, paste and boom you have #Ansible working. No need to activate the virtual environment and what happens after it finishes. Just runs, does what is supposed to do and ends. This is for a repo I will be sharing soon. #CiscoDevNet

Great to see the A2A is now part of the Linux Foundation. For developers this makes easy to pick which protocol to use when there is a de facto standard. #CiscoDevNet www.linuxfoundation.org/press/linux-...

Who knew that shouting to your hard drives could be bad for them? at least that was true 17 years ago. While watching a #eBPF session, I found this funny video (2:00) from no other than Brendan Gregg youtu.be/tDacjrSCeq4?...

The tech stack of GitHub: Ruby on Rails (still! one of the largest codebases in the world) React Go Swift Kotlin .NET Own infra + some use of the cloud Via @ashtom.bsky.social

Yesterday was a good day at the DevNet Zone at Cisco Live. I delivered my first session on eBPF, which I was quite nervious, is a new technology I'm learning, but I think it went well. It was also nice to chat with folks at the Share Your Experience booth, come by if you are here. #CiscoDevNet

Very happy to be at Cisco Live AMER. The #DevNet zone pretty nice. I also I have four sessions this time. The past weeks had been very busy building everything. #CiscoDevNet

Last week I was at #Autoconf3 it was a nice experience. I like the most to chat and exchange ideas with other folks who like network automation. A common topic were advices for buiding solutions. This picture caught my eye since is very similar to the structure NSO offers among other things

How does #curl connect to which host when doing HTTP? First draft.

Now THIS is what a customer-centric app is. Most banks keep sending out warning emails about impersonation and scams. Any app can implement this capability with a little coding + backend work (assuming their BE sensible enough): and yet Monzo is the first one I’ve heard do it.

🔓 No, your k8s workloads are not safe by default. In Kubernetes, everything can talk to everything by default, until you write Network Policies. 🛡️ They give you control over: - Who can talk to whom (L3) - On which ports (L4) - Using what verbs and paths (L7) 🧵

Interesting example of a multi-agent system from a Cisco colleague. github.com/cnoe-io/agen... it uses either AGNTCY or 2A2 to communicate between agents. I have to spend some time to go through the code.

On #vscode I recently discover that copilot can fill the values of the variables/objects when debugging! This is awesome! Finding an issue on your code sometimes is really hard and debugging is your best friend in those cases. #CiscoDevNet #DevNet

I’m hoping people will come with their questions for @cisco.com DevNet’s new #eBPF Book Club livestream series - see you there? Tomorrow, 3pm UK time / 10am Eastern www.youtube.com/live/Y33Uvwi...

I never felt so criticized by an LLM as today. I confessed after reading my request I can see it was not clear, nevertheless, this is so funny to see. I believe, when you ask for help, be clear on what you want to do, and the steps you took. I can feel I failed my own advice. #CiscoDevNet #DevNet

Yesterday found this handy option on vscode "remote.SSH.defaultExtensions" which installs the extensions you specify on the remote host you are connecting. I prefer to work locally, but sometimes, I need to jump in a VM and I like to have a completed environment there. #DevNet #CiscoDevNet

Timeless keyboard shortcuts. clementc.github.io/blog/2018/01...

I had some fun trying to figure it out how to use GNMi with XRd. Here you can see a bit more of this little adventure. The code I used: gist.github.com/jillesca/88c... Interesting side note. The problem doesn't happen on the XR always-On DevNet Sandbox. #DevNet #GNMi

Finally, after some work, here you can find an overview of how I used a graph with #langgraph to troubleshoot an ISIS issue in the network. youtu.be/i6P-aXiXlIo?... GitHub repo: github.com/jillesca/onc... #DevNet

Vibe coding means an upcoming technical debt tsunami. That's what it is. Change my mind.jpg

New UI component from langchain. This is one of the missing pieces I wanted to try, a GUI for my graph. I'm curious to integrate it with my demo. Other alternatives I'm considering using are open-webUI but I'm not completely sure. #DevNet langchain-ai.github.io/langgraphjs/...

Interesting announcement, #Agntcy a spec to discover/compose/deploy Agents. I was thinking when playing with #Langgraph how to connect more agents between them? I thought of expanding the graph. With Agntcy this could be easier. Best thing is an open source effort. #DevNet

After a bit of work I'm happy to share the code I used for my demo at Cisco Live EMEA. This time, using #Langgraph I built a graph of agents that collaborate to resolve a network issue. Make sure you run the first build step to have the all code locally. github.com/jillesca/onc... #DevNet

First time using git submodules to import files from external repos. I quite like the experience, but I see can get confusing at the same time. Working on releasing my demo used on Cisco Live EMEA

Another blog! This time I shared the latest updates we did on the DevNet NSO sandboxes. This was truly a great collaboration between many engineers from CX CSS and DevNet. It was also fun playing with NSO in a container, see the post to find the repo created. blogs.cisco.com/developer/un...

I've been reading this post from Chip Huyen on Agents and I find it very useful. It gives a good explanation of considerations when building an Agent. Tools, Planning and Evaluation. huyenchip.com//2025/01/07/...

I missed when this was live, but I published my first ever blog on Cisco! Is about the new sandbox we built for XRd (IOS-XR in a container) take a look at the blog and at the sandbox (which is free by the way). blogs.cisco.com/developer/ex...

Interested in Model-Driven development? I highly recommend this Cisco Live recording: "Model-Driven Streaming Telemetry and Programmability on Cisco NX-OS - BRKDCN-2904" the speaker does a great job to explain many complex concepts in simple terms www.ciscolive.com/on-demand/on...

I wrote a blog about running Wasm in lightweight #kubernetes distros. At #KubeCon we’re going to use K3S to demo some of this. It’s shocking how much WebAssembly you can pack on a small cluster. www.fermyon.com/blog/lightwe...

This is a great podcast/YouTube I recently started listening and I quite enjoy. In @bookoverflowpod the hosts discuss about technical books, mostly about SW engineering. What I like the most are the interviews to the authors! Great insights. www.bookoverflow.io See more netcode.rocks/favorites/

First post here and I want to share briefly what are multi-stage builds and how I used them to refactor YANG Suite. See my video at www.linkedin.com/posts/jesusi... I can't make the video less than 50mb that bluesky allows, the resolution was not good.