Orhan Ergun

Author Archives: Orhan Ergun

Network Design Concepts Part-3

In the first article of the series, reliability and resiliency are covered. We should know that whatever device, link type or software you choose eventually they will fail. Thus designing resilient system is one of the most critical aspects of IT. I mentioned that one way of providing resiliency is redundancy. If we have redundant […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects. Orhan works as a freelance network instructor, for training you can add ' Orhan Ergun ' on skype.

In addition, Orhan is a:
Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE
https://www.linkedin.com/in/orhanergun

The post Network Design Concepts Part-3 appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – Killing the Spanning Tree with Anthony Sequeira and Orhan Ergun

No country for old men !!. This week in the Orhan Show,  Anthony Sequeira and Orhan Ergun are talking about spanning tree , its drawbacks, spanning tree modes, technologies which can eliminate the spanning tree’s drawbacks or completely do not use it. Orhan recommends all audience to read  this blog post about spanning tree which […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Community Show – Killing the Spanning Tree with Anthony Sequeira and Orhan Ergun appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – Killing the Spanning Tree with SPB,TRILL,Fabricpath from Anthony Sequeira and Orhan Ergun

[player] No country for old men !!. This week in the Orhan Show,  Anthony Sequeira and Orhan Ergun are talking about spanning tree , its drawbacks, spanning tree modes, technologies which can eliminate the spanning tree’s drawbacks or completely do not use it. Orhan recommends all audience to read  this blog post about spanning tree […]

The post Community Show – Killing the Spanning Tree with SPB,TRILL,Fabricpath from Anthony Sequeira and Orhan Ergun appeared first on Packet Pushers.

Common Network Design Concepts Part-2

In the first article of this series, reliability and resiliency has been explained. Every component and every device can and eventually will fail, thus system should be resilient enough to re converge/recover to a previous state. Resiliency can be achieved with redundancy. But how much redundancy is best for the resiliency is another consideration to […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Common Network Design Concepts Part-2 appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Designing Networks for Selfish Users is Hard

‘ On Earth Day at 1990 , New York City’s Transportation Commissioner decided to close 42d Street , which as every New Yorker knows is always congested. “Many predicted it would be doomsday,” said the Commissioner, Lucius J. Riccio. “You didn’t need to be a rocket scientist or have a sophisticated computer queuing model to […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Designing Networks for Selfish Users is Hard appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – CCNA Data Center Part1 with Anthony Sequeira and Orhan Ergun

In this first part of CCNA Datacenter sessions , Anthony Sequeira and Orhan Ergun are talking about the topics in the blueprint. They identify all the technologies which you should know for the CCNA Datacenter exam. Topics include : DCICN exam which is the first exam. DCICT exam which is the second exam. Datacenter Fundamentals, […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Community Show – CCNA Data Center Part1 with Anthony Sequeira and Orhan Ergun appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – CCNA Data Center Part1 with Anthony Sequeira and Orhan Ergun

[player] In this first part of CCNA Datacenter sessions , Anthony Sequeira and Orhan Ergun are talking about the topics in the blueprint. They identify all the technologies which you should know for the CCNA Datacenter exam. Topics include : DCICN exam which is the first exam. DCICT exam which is the second exam. Datacenter […]

The post Community Show – CCNA Data Center Part1 with Anthony Sequeira and Orhan Ergun appeared first on Packet Pushers.

Common Network Design Concepts Part-1

There are design tools which we should consider for every design. LAN, WAN and the data center where these common design tolls and attributes should be considered. Many of the principles in this article series might be fit not only for the network part of the design  but also compute, virtualization and storage technologies also […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Common Network Design Concepts Part-1 appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – Multicast Design and Deployment Considerations with Beau Williamson and Orhan Ergun

In this first part of the Multicast Design and Deployment Series , Orhan Ergun talks with Mr.Multicast Beau Williamson about many multicast concepts. They both start from the basic and deep dive many multicast concepts while giving real life examples.   Why Multicast?. What are the general use cases in real life ? Layer 2 […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Community Show – Multicast Design and Deployment Considerations with Beau Williamson and Orhan Ergun appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – Multicast Design and Deployment Considerations with Beau Williamson and Orhan Ergun

In this first part of the Multicast Design and Deployment Series, Orhan Ergun talks with Mr. Multicast Beau Williamson about many multicast concepts. They both start from the basic and deep dive many multicast concepts while giving real life examples.

The post Community Show – Multicast Design and Deployment Considerations with Beau Williamson and Orhan Ergun appeared first on Packet Pushers.

Visibility, Trustship,Sub optimality or whatever you want to call it.

To be honest I really tried hard to find a name for this article. Maybe it is not convenient and if you have better idea please let me know in the comment. I want to  mention sub optimality and stretch in the networks while using routing protocols  but the idea actually came to me from […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Visibility, Trustship,Sub optimality or whatever you want to call it. appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Video over Internet

Couple days ago I made an interesting talk about Video Traffic over Internet. Sales engineer goes to company and he claims that Video traffic can be carried over Internet without any problem. This is of course wrong and to understand why I have to explain some technical concepts. Main take away from this article is […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Video over Internet appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – CCDE Preparation and Recommendations

Cisco Certified Design Expert exam is the popular expert level vendor independent certification. In my first podcast I talked   with my three guests who have CCDE as well ,  about preparation, resources, recommendations and many other topics. We also discussed whether CCIE is losing its value. Please share your comments about this podcast.   Participants […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Community Show – CCDE Preparation and Recommendations appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Community Show – CCDE Preparation and Recommendations

[player] Cisco Certified Design Expert exam is the popular expert level vendor independent certification. In this podcast Orhan Ergun – CCIE & CCDE  talks   with his three guests who have CCDE certificate as well ,  about preparation, resources, recommendations and many other topics. We also discussed whether CCIE is losing its value. Please share […]

The post Community Show – CCDE Preparation and Recommendations appeared first on Packet Pushers.

Anycast HSRP and Design Considerations

HSRP is the first hop redundancy Cisco property protocol which allows a transparent failover of the first-hop gateway. Many technologies have been slightly modified to use it efficiently. In this article although Anycast hsrp will be explained but first I want to first explain how basically HSRP works.   HSRP has Version 1 and 2. […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Anycast HSRP and Design Considerations appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Give me one 24 port switch please !

After I get an interesting if it is not weird question about switch selection from someone couple days ago I decided to share my ideas about this specific and actually important topic.   Question was exactly like this; ‘ Which one I should buy 24 port or 48 port switch ‘. What would you give […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Give me one 24 port switch please ! appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Twitter War !

Through a court-mandated decision, access to Twitter has officially been blocked across all of Turkey. Weather or not this was the right decision; it is evident that people are not happy about it at all. As you already may know, I am originally from Turkey but have been living elsewhere for many years now while […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Twitter War ! appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

INTER-AS VPNs and Carrier Supporting Carrier (CSC) Part-2

In the first article of this series I mentioned from Inter AS VPN Option A only. This article will be about Option B , C and Carrier Supporting Carrier VPNs. I assume from the readers basic knowledge of these VPNs.Only design points will be highlighted here since my intended audiences are the network designers and […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post INTER-AS VPNs and Carrier Supporting Carrier (CSC) Part-2 appeared first on Packet Pushers Podcast and was written by Orhan Ergun.

Orhan Ergun CCDE Story

Once I decided for the CCDE exam I was thinking it is a hard challenge but surprisingly I will say it is not as much as you think.This is good news and you started to smile ? Hope once you finished the article you continue to it     Yes it is not since I […]

Author information

Orhan Ergun

Orhan Ergun, CCIE, CCDE, is a network architect mostly focused on service providers, data centers, virtualization and security.

He has more than 10 years in IT, and has worked on many network design and deployment projects.

In addition, Orhan is a:

Blogger at Network Computing.
Blogger and podcaster at Packet Pushers.
Manager of Google CCDE Group.
On Twitter @OrhanErgunCCDE

The post Orhan Ergun CCDE Story appeared first on Packet Pushers Podcast and was written by Orhan Ergun.