This adventure starts with git-lfs. It was a normal day and I added a 500 MB binary asset to my server templates. When I went to push it, I found it interesting that git-lfs was uploading at 50KB p…

One of my readers asked for my opinion about the provocative “It’s Time to Replace TCP in the Datacenter” article by prof. John Ousterhout. I started reading it, found too many things that didn’t make sense, and decided to ignore it as another attempt of…

In November 2022 I described some of the intricacies of using EVPN to implement MLAG control plane. You might have noticed that I didn’t dive deep into EVPN details, and I had a good reason for that – Lukas Krattiger did a wonderful job describing how MLAG…

In 2018 I tried to figure out whether the rush to deploy new routing protocols in leaf-and-spine fabrics is anything more than another blob of hype (RIFT, OpenFabric, BGP), considering OSPF got the job done for AWS. Those discussions probably sounded like…

Unconscious patterns of behavior can impede our professional progress. For example, you might watch others capitalize on ideas you have but don’t act on. Or your abrupt delivery of “the facts” alienates your colleagues and creates friction that can be detrimental.…

The simplest way to implement layer-3 forwarding in a network fabric is to offload it to an external device1, be it a WAN edge router, a firewall, a load balancer, or any other network appliance.

Routing at the (outer) edge of the fabric

An application-level gateway (ALG) is a type of firewall that filters traffic at the application layer of the OSI model. Here’s how they work—and how they can benefit your organization.

Stateful-inspection firewalls are a critical component of network security. Learn how they work and why they are important.

Virtual networks are vital for cloud computing, and virtual LANs can transform networks