Internet Services, Modems & Routers, Tech Reviews, Computer Networking, Security, and more!

Afroz Ahmad – Main Author of AfrozAhmad.com

Welcome to Afroz Ahmad – I’ve been writing about computer network technologies on my blog since 2012. My name is Afroz Ahmad, and I am a seasoned Network Engineer and author of AfrozAhmad.com.

I’m a CCIE with more than 17 years of experience in Computer Networking, Data Centers, Telecom, Internet Services, and ISPs. Currently, I work as a Network Designer for a leading ISP equipment vendor. I share my expertise through my blog and courses, aiming to help people solve everyday internet issues, select the appropriate equipment for their tech needs, and simplify complex networking concepts for both beginners and experienced professionals.

Read more about me >>

Reach out to me with any questions you have on Computer Networking, Modems, Routers, Internet services, etc.

Latest Posts

HSRP vs VRRP vs GLBP

HSRP vs VRRP vs GLBP – A Quick Guide

Afroz AhmadAug 27, 20214 min read
Which one to use while deciding between HSRP vs VRRP vs GLBP, this is really a matter of the type of equipment at your disposal, network design complexity, or sometimes personal preference. The main difference is that VRRP is industry-standard while HSRP and GLBP are Cisco-proprietary protocols.
How to Configure VRRP on Cisco Device

How to configure VRRP on Cisco Devices – With Video and Quiz

Afroz AhmadAug 25, 202111 min read
VRRP is an open standard FHRP defined in RFC-3768. It can be configured on Cisco devices to quickly detect and respond to router failures, providing fault tolerance at the network layer. Watch the video and take the quiz for a brief overview of VRRP.
HSRP Config Full Guide

HSRP Config – The Definitive Guide with Video, Diagrams, Configs, and Quiz

Afroz AhmadAug 11, 202118 min read
HSRP is an FHRP (First Hop Redundancy Protocol) developed by Cisco to provide redundancy and high network availability almost anywhere in the network where we have two layer3 devices. Watch the short video and take a quiz to quickly understand the HSRP config.
Router-on-the-stick-config

Router on the Stick Configuration – Enterprise and Service Provider Example

Afroz AhmadJul 21, 202110 min read
The router on the stick configuration is a powerful and easy way to add additional equipment to your network without running a direct cable from your user device to the router. This post will discuss two scenarios where we can use this type of configuration: in an Enterprise network and a Service Provider network.
Behavioural Interview Questions and Answers

21 Done For You Behavioural Interview Questions and Answers

Afroz AhmadJun 30, 202123 min read
Behavioural interview questions and answers are designed to learn about your past behavior, which relates to the job description and position you are interviewing for. The general belief is that your past behavior is predictive of your future behavior, so the interviewer wants to learn what you have done to understand
Cisco Router Login Details

2 Simple Ways To Find Cisco Router Login Details Without Looking Like An Amateur

Afroz AhmadMay 19, 20218 min read
If you are looking for a way to find cisco router login details, you are in the right place! I will share with you two simple methods that can help you find your cisco router's login information.
staying awake

This simple Windows10 feature can save you from staying up all night

Afroz AhmadFeb 9, 20214 min read
What if I say that there is one simple windows10 feature to turn off blue light, which is turned off by default and can help you sleep better, especially if you work at night on your laptop.
Installing BackTrack 5 R3 inside Vmware Workstation

Installing BackTrack 5 R3 inside Vmware Workstation

Afroz AhmadJan 26, 20132 min read

In this tutorial i will show you how to install Backtrack 5 R3 in Vmware workstation 8, it is recently  released by offensive security team and it is used by penetration testers world…

Cisco Nexus 7000 VRF and OSPF Configuration inside Titanium N7K Emulator

Cisco Nexus 7000 VRF and OSPF Configuration inside Titanium N7K Emulator

Afroz AhmadJan 26, 20133 min read

This exercise has been completed on Nexus 7K titanium emulator. I am running two N7K titanium machines inside vmware workstation and have connected 7 network adapters to emulate the physical…

Configure ACLs using Atomic Programming in Cisco Nexus 7000

Configure ACLs using Atomic Programming in Cisco Nexus 7000

Afroz AhmadJan 24, 20132 min read

This lab has been completed on Nexus 7010 with the following hardware and software installed; you can take a look at Cisco Nexus 7000 user accounts and RBAC in my…

ASA 8.4 Site to Site VPN Tunnel using ikev1

ASA 8.4 Site to Site VPN Tunnel using ikev1

Afroz AhmadJan 24, 201310 min read

We will be working on the above-mentioned topology on GNS3. Our goal is to make a VPN S2S tunnel between Arizona ASA1 running code 8.4 and Nevada router, and finally,…

Cisco Nexus 7000 User Accounts and RBAC

Cisco Nexus 7000 User Accounts and RBAC

Afroz AhmadJan 23, 20134 min read
In this article, we will discuss Nexus 7K user accounts and RBACs
GLBP Details

GLBP Details, Configs and Load Balancing Tests

Afroz AhmadApr 23, 201226 min read
Gateway Load Balancing Protocol (GLBP) is a Cisco proprietary protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load balancing functionality. Watch the short video and take a quiz to get a quick understanding of GLBP.
How to Copy Large Show Tech-support from Cisco Device Using Putty

How to Copy Large “Show Tech-support” from Cisco Device Using Putty ?

Afroz AhmadJan 22, 20123 min read
How to copy a large “Show Tech-support” output from a Cisco device using Putty. This is useful in case you are unable to copy the entire content of the output in one go.
Bridging LAN Over WAN

Bridging LAN Over WAN

Afroz AhmadNov 21, 20114 min read

Bridging for me is simply straightforward here in Bridging we are NOT rewriting the Layer 3 packet simply forwarding  the Layer 3 information in Layer 2 frame intact from one…

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What if we dont know the AS number of the Neighbouring Router in EIGRP…

Afroz AhmadNov 3, 20113 min read

Here i have taken a simple topology R1 is connecting directly over Serial 0/0 link to BB1 , and as we know we dont have much access to Backbone routers…

OER/Pfr ….Watching like hell……

OER/Pfr ….Watching like hell……

Afroz AhmadOct 31, 201114 min read

Today we will discuss not so explored cisco outstanding feature OER/Pfr and see how it can monitor and make decisions on its own and route  traffic on the best available…

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MSDP with BGP Address-family Ipv4 Multicast

Afroz AhmadOct 29, 20116 min read

Today we will be discussing MSDP with BGP ipv4 multicast address-family. The topology is simple we have taken four routers R1 in BGP AS 1 , R5 in BGP AS…

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Spanning-tree Guard Root

Afroz AhmadJun 18, 20113 min read
We'll discuss STP Root Guard, which prevents Layer 2 loops in network anomalies.
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3560/3550 Recovery Procedure

Afroz AhmadJun 15, 201112 min read

3560/3550 Recovery Procedure———————————— Connect a PC to the console port of the switch, Use a terminal emulation program such as Microsoft Windows HyperTerminal in order to establish the console session.…