Total 2 Blogs

Created by - Orhan Ergun

Cisco SD-Access Control Plane Protocol LISP

Cisco LISP - Locator and Identity Separation Protocol is the main piece of Cisco SD-Access Solution. It is a control plane of SD-Access and many network engineers want to understand, and they need to understand it in more detail. I discussed with the inventor of LISP, Dino Farinacci!   LISP is the Control Plane protocol of Cisco SDA which is Campus Network Design and Deployment solution. It helps for automating Campus network with the help of DNA-Controller and in the framework, there are 3 planes. Control Plane , Data Plane and Management Plane. Control Plane is LISP, which comes with different architectural nodes such as MR/MS (Map Resolver/Map Server), ITR )(Ingress Tunnel Router), ETR (Egress Tunnel Router) and PXTR (Proxy Ingress and Egress Tunnel Router). There are many discussions on Linkedin and Twitter on why EVPN was not chosen as Control Plane for SD- Access. Let's skip this discussion for now but let's understand that, SDA uses different terminologies and although they do the same functions, they are not exactly LISP terminologies. For better understanding. let me share what are the corresponding terminologies of SDA   Control Node : MR/MS Edge Nodes: ITR and ETR Border Node : PXTR (Proxy ITR and ETR)   In the discussion with Dino Farinacci, we discussed many basics and some advanced topics with this technology and Jeff Tantsura was my co-host in the video. Below are some of the discussion points:   1. What are most common use cases of this technology? Which one do you see in real deployments? 2. What does LISP Control Plane and LISP Data Plane means? 3. Can you talk about LISP role in Cisco’s SD-Access? 4. Is there vendor interoperability? Can I use it with Cisco and other vendors in the same network? Or is it just some software implementation? 5. Can LISP replace BGP? Many people talked about this use case in the past, what do you think about it?   https://www.youtube.com/watch?v=al3ykkkltbY&t=1558s  

Published - Wed, 09 Feb 2022

Created by - Orhan Ergun

New book on LISP – Locator and Identity Separation Protocol

New book is released on LISP – Locator and Identity Separation Protocol. “LISP Network Deployment and Troubleshooting: The Complete Guide to LISP Implementation on IOS-XE, IOS-XR, and NX-OS” I still couldn’t start to read it as the authors didn’t send my own copy yet :), but I want to congratulate the authors, Tarique, Vinit and Yves on the effort by now. I know Tarique personally, he joined my CCDE classes couple times and I can say that He is very smart and knowledgable engineer. Yves and Vinit both had the books on other domains already, they have a good experience on writing and delivering message to the readers. In this book, authors cover,  LISP Architecture, IPv4 and IPv6 Unicast Routing with LISP, LISP Multicast Routing. Last but not least, they explain how LISP would be used for IP Mobility in Traditional and Modern Datacenter environment. I discussed couple months ago ‘Is LISP dead‘ in one of my blog posts, but wondering now, by understanding the protocol with this extensive book, can it create more adoption? We will see. Nevertheless, even if you won’t deploy LISP, reading this book I think will provide nice information on Datacenter Fabrics, Overlay and IP in IP encapsulation and IP Mobility.Good news is if you have Safari subscription, it is available on Safari too. Here is the link. 

Published - Wed, 27 Nov 2019