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BGP Network Design – BGP Confederation

Example of Confederation with 2 subASs

BGP confederations allow network engineers to manage the complexity and scale of large autonomous systems. BGP confederations can be seen as an alternative to BGP route reflectors, or possibly used together. The focus of this article will be solely on BGP confederation: the basic overview, usage and configuration. Why would you want …

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Subnet Zero and All-Ones-Subnet explained

ip subnet-zero

In this article we are going to explain what the ip subnet zero is, but first we need to introduce subnetting. The Subnetting is used to partition a network into sub-networks (also called subnets) that are smaller in terms of addressing space. The first and the last subnets calculated during the …

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CIDR vs VLSM: understanding how they works

cidr vs vlsm

Classless Inter Domain Routing (CIDR) e Variable Length Subnet Mask (VLSM) were introduced to use the IP addressing space in a more efficient way, but also to improve the scalability for the global routing mechanism. Let’s see how CIDR vs VLSM get to work with IP addresses. The exponential growth of …

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