Hello Google Fans, Sometimes it is a complex task to determine which compute type on Google Cloud should be used for your projects. Google Cloud has different types of compute resources and each of them has different benefits and use cases. It is very important to understand fundamental characteristics of them and selecting appropriate one. […]
Learning
Cisco Bug: CSCvf52723-FlexConnect AP Cannot Pass Traffic
How Do You Know, It Is A Bug? Each software has bugs. The most important thing is about a bug, how it affects your business or your life! We are tech guys and we spent most of our time to solve issues. However, some of issues require a different perspective or knowledge level to solve […]
Cisco Bug: CSCuz25672 – Unable to launch ADE-OS shell
Story At 07:00 AM, my phone is ringing. I am answering it and my teammate saying that our customer’s users’ getting authentication fail messages on their computers. I am logging on my computer and accessing to Cisco ISE Primary Node via SSH, but an error message is there; % Error: Unable to launch ADE-OS shell. […]
How Switch Works?
It just forwards frames. That’s it. Yes, the above statement is totally correct. A switch’s main function is forwarding frames between its ports. In this article, we will look more deeply into this functionality and learn how a switch does this! Learn from the scratch When you attach 2 computers to a switch and want […]
DHCP Messages & Leasing Process
Do You Know What DHCP Is? If it is first time you are learning DHCP, you can find an introduction is here! Let’s Dive In DHCP! DHCP is protocol using between DHCP Clients and DHCP Servers to provide automatic TCP/IP configuration to clients. There are some steps and message packets sending by clients and servers […]
How DHCP Makes Our Life Easier?
Simple Definition of DHCP (Dynamic Host Configuration Protocol) DHCP is a protocol using in networks to provide automatic TCP/IP configuration to endpoints. Clients using this protocol send a Discover packet to the network and DHCP Server replies this with a Offer packet. After that, party begins! More Simple Definition I know, it’s first time you […]
What is DHCP Snooping and Why it is important?
Have A Good Friday! You are the network administrator for a company and manage an enterprise network infrastructure with your great team! One day, your phone is calling and your troubleshooting session starts! Clients cannot connect to servers, applications, printers and internet. You are connecting and checking related network devices, but everything is working. You […]
Why do you need to enable PortFast on access ports?
Brief Explanation PortFast is a good feature to put switch interfaces in forwarding state immediately. Also, it helps reducing of STP re-calculations on switches and relatively providing network performance improvements. Without PortFast If you don’t use it under an interface configuration, when the link state changes to UP, switch firstly put interface in blocking state […]