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my CKA/CKAD study plan

my CKA/CKAD study plan

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This is the story of studying Kubernetes basics from the perspective of network engineer. I had basic Linux background, some free time, and willingness to discover this brave new world of containers, pods and microservices. I think one of the best ways to do this kind of studying is to follow the blueprint of recognized industry certification. This gives you a concrete study plan and bring structure to your knowledge from the very beginning. There are such certifications in Kubernetes…

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Juniper EVPN BGP options – eBGP-only design

Juniper EVPN BGP options – eBGP-only design

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In another part of his never-ending EVPN/BGP saga Ivan Pepelnjak argued with Juniper fanboys once again about sanity of iBGP-over-eBGP and eBGP-over-eBGP designs and all that fun stuff. I’ve already written my opinion about that topic in my previous post and numerous comments to Ivan’s posts (TL;DR: iBGP-over-eBGP design has its advantages, just implement it wisely – don’t place RR on spine switches). But there is one thing that worries me. In almost every one of his posts Ivan talks…

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List of EVPN and DC-related IETF drafts (as of 1H 2018)

List of EVPN and DC-related IETF drafts (as of 1H 2018)

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Ethernet Virtual Private Network (EVPN) solution is becoming pervasive for Network Virtualization Overlay (NVO) services in data center (DC) networks and as the next generation VPN services in service provider (SP) networks. As a result of this popularity a lot of work is going on in IETF in this area. In this post I collect links to some of the interesting IETF drafts in this area. All this information is relevant for 1H 2018 timeframe. Keep in mind to pay…

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BGP design options for EVPN in Data Center Fabrics

BGP design options for EVPN in Data Center Fabrics

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Ivan Pepelnjak described his views regarding BGP design options for EVPN-based Data Center Fabrics in this article. In comments to following blog post we briefly discussed sanity of eBGP underlay + iBGP overlay design option and come to conclusion that we disagree on this subject. In this blog post I try to summarize my thoughts about this design options. Let’s start with the basics – what’s the idea behind underlay/overlay design? It’s quite simple – this is logical separation of…

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