Cisco SD-WAN licensing

explained

Author: Marcin Bialy

09.2020

Cisco SD-WAN licensing explained

I will not elaborate on how good or bad this idea is because that’s how the entire subscription world works, whether we like it or not. My post is intended for those who want to have a quick overview of Cisco SD-WAN licensing before they decide which way to go.

Author: Marcin Bialy
Category:
04.2020

VPN remote access with Duo Multi-Factor Authentication. Demo

I am presenting a video showing how Duo can be used as second factor authentication (push app notification in this case) for VPN remote access connections.

Author: Marcin Bialy
03.2020

How does Zero-Touch-Provisioning (ZTP) in Cisco SD-WAN work?

The Zero-Touch Provisioning (called ZTP) is the one of the concept behind SD-WAN that I mentioned here in What is SD-WAN article that I wrote about year ago. Frankly speaking, ZTP is something that every (or almost every) SD-WAN vendor has implemented. In this post I am going to dig into detail to the Cisco SDWAN ZTP.

Author: Marcin Bialy
03.2020

How to achieve Multi-Factor Authentication for RDP sessions?

In this blog post, I am sharing a video showing how to use Multi-Factor Authentication for RDP (Remote Desktop) sessions. We’ll use Cisco Duo Security as the second factor (push app) authentication method. This recording was prepared for one of our Grandmetric Tech Meetings. Lab schema:   RDP and second factor authentication live demo   […]

Author: Marcin Bialy
01.2020

World SD-WAN Summit, Berlin 2019 – Recap

About month ago I attended the SD-WAN World Summit organized by Luxatia International in Berlin. Thanks to organizer i was invited as a speaker. My presentation took place in day 2 of the event and the title was “Changing User Experience. Customer WAN to SD-WAN transformation”

Author: Marcin Bialy
12.2019

Building identity-based network access with Cisco pxGrid

In following post I will discuss the concept of Identity based networking and its components based on Cisco Systems products. Then I will show the steps how to build functional network where pxGrid is one of the core protocols used.

Author: Marcin Bialy
05.2019

Startup Europe Proptech Awards with Grandmetric in Semi-Finals

Grandmetric as an Startup size company was selected from the 267 of European Startups to the Semi-Finals in Brussels where the top 50 companies from all over the Europe gave their pitching sessions. Each startup was required to deliver the exact 3-minutes (!) pitch about their innovation or product and had 2 minutes for Q&A round…

Author: Marcin Bialy
Category:
04.2019

What is SD-WAN (SDWAN)

Specifically, the paradigm called data, control and management plane dissagregation and network automation. Here, you can read about paradigms and characteristics that the SDN idea brings. Dissagregation approach simplifies the process of building & maintaining something called network overlay. Overlay is an abstraction that SDWAN idea relies on (you will read more on dissagregation and overlay concepts below).

Author: Marcin Bialy
06.2018

Cisco WLC does not switch to newly added Radius server

Problem description I came across one of customer’s problem with Cisco WLC wireless controller and 802.1x network. Radius service was driven by NPS (Microsoft Windows Radius). After setup of new NPS server customer configured the second Radius server on WLC swapping the radius server priority (on the first place under the WLAN Security -> Advanced […]

Author: Marcin Bialy
05.2018

Cisco AP can’t join the WLC controller… DTLS handshake failure.

The problem, network components and topology I recently faced the issue with AP join to vWLC. Cisco 2700 AP could not join to newly installed Cisco vWLC controller. A colleague asked me to take a look and explained the topology. The vWLC was located in Grandmetric DC Testing Labs whereas Cisco CAP-2700 was located at […]

Author: Marcin Bialy
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