Schedule a free product or technology session with Grandmetric Engineer
schedule a video call

Blog

IP and Mobile Trends and Education

 

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 Cisco identity-based network access with 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 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 swaping the radius server priority (on the first place under the WLAN Security -> Advanced tab […]

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. Coleague 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 Grandmetric […]

Author: Marcin Bialy
02.2018

Cisco ASA & ASA FirePOWER Services training agenda

Today I have privilige to announce our new Cisco ASA & ASA FirePOWER Services training agenda. In this post I will describe the agenda in detail and what you can expect from each training module. As you perhaps racall from short agenda posted on our training list, this training is a condensed meshup prepared specialy […]

Author: Marcin Bialy
01.2018

How does routing table work?

In this post we are going to focus on the following process: “destination IP field of packet is checked against information stored in router”. The place where routing information is stored is called a routing table.  Routing table contains routing entries, that is list of destinations (often called: list of network prefixes or routes).

Author: Marcin Bialy
01.2018

How does router work?

As you might be aware, bits are a form of language for machines and packets are series (groups) of these bits that traverse the network. The mechanism via which these packets travel across the network is organized thanks to Internet Protocol (IP is set of common rules, structures and descriptions). In general, we have: END DEVICES (like […]

Author: Marcin Bialy
12.2017

What is Software Defined Network (SDN)?

No 1 principle of SDN is to separate the devices abstraction that transport the network traffic (forwarding plane) from control plane abstraction, in such a way that it enables to control the network functions by the means of software layer. In practice it can be systems, web applications, and scripts.

Author: Marcin Bialy
Load more
Show all
 

Newsletter