You search something on Google, or read the materials by referrals. You do research on a particular topic and find many resources. How you are organizing your study ? What is the most important thing even before you start reading any technology topic ?
MPLS Design Question – MPLS is one of the most commonly used encapsulation method today. Especially on Wide Area Networks of the Service Providers, Large Enterprises and some datacenters.
Service Providers sell MPLS services to customers for decades. When customers want to have Service Provider redundancy so two MPLS circuit from different Service Providers, Inter AS MPLS service is created between those providers.
Or customers have a location where their MPLS service provider don’t have there but customer wants to have end to end MPLS connectivity between their all locations, again Inter MPLS Service is created between the providers.
If you are a visual learners and want to understand the basics of Inter AS MPLS VPN Options, check my youtube channel and subscribe for the more design videos.
Below BGP design case study is taken from the Orhan Ergun’s CCDE Practical Workbook.In the new version of the workbook there are more than 50 case studies are shared for many technologies.
If you are in the network design field or want to learn about it,don’t miss the book.
Network A is a customer of Network Z, Network B is a peer of Network Z.
Network A becomes transit customer of Network B.
Network A announces 188.8.131.52/16 aggregate to Network Z and more specific prefixes,184.108.40.206/24 and 220.127.116.11/24 to Network B. Network B sends more specific to its peer Z.
Network Z only announces the aggregate to the world. Network B doesn’t announce anything to the upstream SP.
What is the impact of this design ?
Is there any problem ? If there is , how you can fix ?
HSRP, VRRP and GLBP are the three commonly used first hop redundancy protocols in local area networks and the data center.
In this post, I will briefly describe them and highlight the major differences. I will ask you a design question so we will discuss in the comment section below.
Last week I sent a below questions and asked the optimal place for an OSPF ABR (Area Border Router). There was a high level of participation. Thanks everyone who shared their thoughts. Hopefully they didn’t do it only for a free CCDE Workbook prize 🙂
OSPF Design – In the below picture, where should you place an OSPF ABR (Area Border Router) to scale OSPF design ? Why ?
Please share your thoughts in the comment box below.
First 5 correct answers will get my CCDE Preparation Workbook for free. Please subscribe to email list so I can see your email address for communication.
In this post, I will give you a business requirements and information about the business of a fictitious company,together we will try to find an optimal solution for the given questions.
There will be many valid solution as you will see from the comments, we will have to make tradeoffs between each design goals while selecting one design vs another. Read more
I am going to create a new category on the blog which we will discuss together the different technologies,protocols, designs and architecture.
You can suggest a discussion topics and you all please welcome to join the discussions in the comment box of each topic.
I want to throw a first topic for the discussions !
Which Enterprise Architecture is more complex ? ( Did you read network complexity article in the blog ? )
VRF-lite with GRE/dot1q or MPLS L3VPN ? Read more