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Orhan Ergun
Works at Qatar Petroleum
Attended Uludag University
Lives in San Francisco
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Orhan Ergun

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That's why I try to avoid all below points in my CCDE class ! I wish good luck for everyone who attempt CCDE practical exam today. 
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Orhan Ergun

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OSPF as a PE-CE routing protocol can be used in the MPLS Layer 3 VPN design between customer and the service provider.
OSPF as a PE-CE routing protocol can be used in the MPLS Layer 3 VPN design between customer and the service provider.
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actually customer carrier runs MPLS for their vpn customer as I stated in the post as well. Customers of customer carrier may or may not run  MPLS
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Orhan Ergun

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MPLS VPN is used mostly as primary connectivity and DMVPN as a backup in the small medium business.
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I wouldn't define it that way. L2 VPN also separates each customers control plane. Btw both also separates data plane as well.
But yes, it doesn't provide the basis of security (CIA-Confidentiality,Integrity,Availability) to you by default as I stated in my above comment.
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Orhan Ergun

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DMVPN is dynamic, scalable and easy to configure Cisco specific VPN solution.
DMVPN uses two major technologies for its operation :
NHRP Next Hop Resolution Protocol
mGRE Multipoint GRE
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Orhan Ergun

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S-IS Routing Protocol Frequently Asked Questions. http://orhanergun.net/2015/02/routing-protocol-faq/
IS-IS is a link state routing protocol.Very similar to OSPF but there are differences.IS-IS routing protocol is used mainly in service provider networks.
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ok.
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Orhan Ergun

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Mini Network Design Scenario - OSPF
http://orhanergun.net/2015/02/ospf-design-challenge/
In this post I will share a mini design scenario with you and ask couple questions about the fictitious company architecture.
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Starting a job with a PAN firewall that uses OSPF... Thanks
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Orhan Ergun

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CSC Carrier Supporting Carrier is a hierarchical MPLS VPN architecture between the Service Providers.
CSC Carrier Supporting Carrier is a hierarchical MPLS VPN architecture between the Service Providers.
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Thanks Praveen, Hope to see your comments on the blog as well. 
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Orhan Ergun

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Segment routing is a source routing mechanism which provides Traffic Engineering , Fast Reroute, MPLS VPNs without LDP or RSVP-TE.
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Its for node/last link protection in the ms.
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Orhan Ergun

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BGP Route reflectors are used as an alternate method to full mesh IBGP and helps for scaling.
BGP Route reflector clustering is used to provide redundancy in an RR design. Route Reflectors and its clients create a cluster.
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Orhan Ergun

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What is the Most scalable, most complex , least secure and uncommon inter AS MPLS solution ? 
http://orhanergun.net/2015/02/inter-option-c/
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Have him in circles
63 people
Beau Williamson's profile photo
joko Purnomo's profile photo
Peter J. Welcher's profile photo
Özcan Nuh's profile photo
Molly Bloom's profile photo
Nicolas Michel's profile photo
Walid Alioua's profile photo
RAJKUMAR .R.RAJENDRAN's profile photo
Brandon R's profile photo
Communities
15 communities
Education
  • Uludag University
    Electronic Engineer, 1998 - 2014
  • Uskudar Cumhuriyet Lisesi
    Matematik / Fen, 1996 - 2014
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Gender
Male
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Married
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Tagline
Orhan Ergun is a CCIE #26567 , CCDE#2014::17 Network Architect | Instructor
Introduction

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:

Work
Occupation
Network Architect | Instructor
Skills
CCIE , CCDE , External SME for CCDE , Host at packetpushers podcast , Writer at networkcomputing
Employment
  • Qatar Petroleum
    Network Architect, 2013 - present
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
San Francisco
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