IGP Archives - Cisco Network Design and Architecture | CCDE Bootcamp

Hair-pining in a Wide Area Network – Simple Design Scenario

12/7/2018 by Orhan Ergun

In this post we will discuss how hair-pining is occurring in some topologies in the Enterprise bra

EIGRP in the Service Provider Networks

8/9/2018 by Orhan Ergun

EIGRP in the Service Provider Networks. If you are wondering whether EIGRP (Enhanced Interior Gatewa

Different IGP and BGP Methodologies of Multi National Service Providers

5/8/2018 by Orhan Ergun

Different IGP and BGP Methodologies of Multi National Service Providers. I mentioned two different I

IP Fast Reroute, LFA and Remote LFA Discussion for real network deployment

10/3/2017 by Orhan Ergun

IP Fast Reroute , LFA (Loop Free Alternate) , Remote LFA and in general recovery and protection disc

IS-IS Overload Bit – Why IS-IS Overload bit is used ? What are the use cases ?

8/30/2017 by Orhan Ergun

IS-IS Overload Bit - Why IS-IS Overload bit is used ? What are the use cases ? In this post, I wil

IS-IS Case Study – Ausnet

8/16/2017 by alaaissa

This is a case study which provides a detailed design steps for IGP protocol on hypothetical Interne

Is Inter-AS MPLS VPNs commonly deployed ?

8/14/2017 by Orhan Ergun

Is Inter-AS MPLS VPNs commonly deployed ? In real-life deployment which Inter-AS MPLS VPN Option is

OSPF Prefix Suppression helps company to use 200 routers

8/10/2017 by Orhan Ergun

OSPF Prefix Suppression helps to company to use 200 routers in their network without any problem. Yo

What is KISS Principle ? Keep it Simple and Stupid ?

8/7/2017 by Orhan Ergun

What is KISS Principle ? Okay it stands for Keep it Simple and Stupid but what does really it mean i

Flat OSPF network is not a problem ! But

7/31/2017 by Orhan Ergun

Flat OSPF network, or single area OSPF networks are real. In fact most of the OSPF network today dep

Fast Convergence and the Fast Reroute – Definitions/Design Considerations in IP and MPLS

3/15/2017 by Orhan Ergun

Fast Convergence and the Fast Reroute Network reliability is an important design aspect�

OSPF Best Practices

3/14/2017 by Orhan Ergun

OSPF Best Practices Understanding and using best practices is very important though may not be

Packet loss with Fast Reroute

1/14/2017 by Orhan Ergun

Packet loss with Fast Reroute Do we still lose packet with fast reroute? One of my students asked

OSPF to IS-IS Migration

10/10/2016 by Orhan Ergun

There are many reasons of OSPF to IS-IS migration, specifically for the Service Provider networks. S

OSPF Multi-Area Adjacency | OSPF Area Placement | RFC 5185

10/9/2016 by Orhan Ergun

OSPFv2 by default setup only one adjacency over a single link. But this can be an issue some time an

IS-IS Design considerations on MPLS backbone

10/9/2016 by Orhan Ergun

IS-IS Design considerations on MPLS backbone Using IS-IS with MPLS require some important design co

IS-IS level 1, IS-IS Routing Protocol Levels

7/25/2016 by Orhan Ergun

What is IS-IS Level 1 ? Why IS-IS level 1 is used ? What are the IS-IS levels ? What is the correspo

EIGRP RFC 7868

6/7/2016 by Orhan Ergun

Finally, informational EIGRP RFC 7868 has been published.It is not anymore Cisco's EIGRP, it is an o

Why Are Dynamic Routing Protocols Used?

6/1/2016 by Orhan Ergun

Why are dynamic routing protocols used is usually asked by newbies in the networking field, especia

EIGRP Feasible Successor

5/23/2016 by Orhan Ergun

One of the advantages of EIGRP Feasible Successor is that it speeds up the EIGRP. In fact, if there

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