Orhan Ergun No Comments

IPv6 Business Drivers and PI/PA Address Space

IPv6 Business drivers can be many and different businesses have different reasons to deploy IPv6 on their network.

 

IPv6 is more commonly deployed in the Service Providers than Enterprises or Small Medium Businesses. Do you know why ?

 

Main reason is IPv4 address space exhaustion. There is no available public IPv4 addresses in the RIR (Regional Internet Registries). Thus, when Service Providers want to allocate an IPv4 address to their customers, one of their options is to deploy IPv6.

 

There are many other reasons to deploy IPv6 in both Service Providers and the Enterprises and I explained many IPv6 business drivers in the below video, along with Provider Independent and the Provider Address Blocks.

 

Also, understanding Provider Independent (PI) and Provider Assigned (PA) address blocks is important because there are some design tradeoffs.

 

I explained these two topics, IPv6 Business Drivers and the PI/PA Address Blocks on my youtube channel in the below video.

 

 

Orhan Ergun 9 Comments

BGP Design Case Study

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.

Scenario :
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 4.0.0.0/16 aggregate to Network Z and more specific prefixes,4.0.0.0/24 and 4.0.1.0/24 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 ? 

Read more