Oscar Olotu

Oscar Olotu

A System Administrator and Freelance Developer

See My Projects

What is Multi-point GRE (mGRE)?

mGRE is key ingredient to build the DMVPN tunnel. Without mGRE we can’t build the DMVPN tunnel. DMVPN uses a combination of the following technologies to build the tunnel : 1. Multi-point GRE (mGRE) 2. Next-Hop Resolution Protocol (NHRP) 3. Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP) 4. Dynamic IP-Sec encryption(Optional) Point-to-Point Generic Routing Encapsulation (GRE) Tunnels: The traditional

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Recovering from ErrDisabled in Cisco Devices

The ErrDisable feature is implemented to handle special situations where the switch detected excessive or late collisions on a port, port duplex misconfiguration, EtherChannel misconfiguration, Bridge Protocol Data Unit (BPDU) port-guard violation, UniDirectional Link Detection (UDLD), and other (miscellaneous) causes. The error-disable function allows the switch to shut down a port when it encounters physical,

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Windows Terminal Preview settings and configuration

 Windows Terminal is a new, modern, fast, efficient, powerful, and productive terminal application for users of command-line tools and shells like Command Prompt, PowerShell, and WSL. Its main features include multiple tabs, Unicode and UTF-8 character support, a GPU accelerated text rendering engine, and custom themes, styles, and configurations. Here are some links that might

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If you talk all the time, you’ll never hear what anybody else has to say and the only thing you have to talk about is your own conversation.

Alan Watts

FlexVPN an introduction.

FlexVPN, unofficially called “DMVPN phase 4” is a newer “solution” for deployment of VPNs and for this you must have newer hardware to support the versions of IOS code which offer FlexVPN features. DMVPN is an option on almost every Cisco router. FlexVPN is a configuration framework (a collection of CLI/API commands) aimed to simplify

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Prisoners of Geography My first read of 2019

Through out this year I have been reluctant to start a book, despite the fact that a have a goal of atleast two books a month (depends with how many pages the book had. This is due to I had this new fancy job where am the CyberSecurity Administrator of Bank X, thus the stuffs

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Through others we become ourselves.

Lev S. Vygotsky

DevFest Dar-es-Salaam

This week i had a chance to attend one of the largest google developers event is organised by a community am proud to be a member off (GDG Dar Es Salaam). The event was hosted at the Costech Building Kijitonyama, where alot of awesome people attended with our friends from GDG Kisumu and GDG Nairobi.

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Getting started with Progressive Web App(PWA)

A Progressive Web App (PWA) is a web app that uses modern web capabilities to deliver an app-like experience to users. It looks and behaves as if it is a mobile app and can be kinda installed. In this post, we’ll be looking at 4 things every progressive web apps must have.

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“Teach self-denial and make its practice pleasure, and you can create for the world a destiny more sublime that ever issued from the brain of the wildest dreamer”

Sir Walter Scott