A couple of days ago I passed the Cisco Certified Design Expert (CCDE) Qualification Exam which means that I am now eligible to take the CCDE practical. I’m aiming to give that a try in May. This post will give
Network Simulation – Cisco Releases VIRL 1.0
Just in time for thanksgiving, Cisco has released version 1.0 of the popular network simulation tool VIRL. This is a major new release moving from Openstack Icehouse to Openstack Kilo. This means that your previous release of VIRL will NOT
General – Behavior Of QoS Queues On Cisco IOS
I have been running some QoS tests lately and wanted to share some of my results. Some of this behavior is described in various documentation guides but it’s not really clearly described in one place. I’ll describe what I have
CCDE – Firewall And IPS Design Considerations
Introduction This post will discuss different design options for deploying firewalls and Intrusion Prevention Systems (IPS) and how firewalls can be used in the data center. Firewall Designs Firewalls have traditionally been used to protect inside resources from being accessed
Network Simulation – Cisco VIRL Increases Node Count
Great news everyone. Some of you might have seen that I created a petition to increase the node limit in VIRL. I know there have been discussions within Cisco about the node limit and surely our petition wasn’t the single
CCDE – Load Balancer Designs
Introduction This post will describe different load balancer designs, the pros and cons of the designs and how they affect the forwarding of packets. Load Sharing Vs Load Balancing The terms load sharing and load balancing often get intermixed. An
CCNA – Operation Of IP Data Networks 1.5
We move on to the next topic which is 1.5 Predict the data flow between two hosts across a network This is a very important topic for the CCNA. It may feel a bit overwhelming at first to grasp all
CCNA – Operation Of IP Data Networks 1.4
It’s time for the next topic for the CCNA. 1.4 Describe the purpose and basic operation of the protocols in the OSI and TCP/IP models There are tons of books written on the OSI and TCP/IP model so I won’t
CCDE – Optical Design Considerations
Introduction As a network architect you should not have to know all the details of the physical and data link layer. What you need to know though is how different transports can support the topology that you are looking to
CCNA – Operation of IP Data Networks 1.3
We move on to the next topic: 1.3 Identify common applications and their impact on the network When you work in networking, it’s important to have an understanding of how applications work and what are their characteristics. Is it sensitive