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HSRP : the definitive guide

hsrp

Hot Standby Routing Protocol (HSRP) is a Cisco proprietary default gateway redundancy protocol. If the primary gateway fails, HSRP automatically redirects hosts to the the backup gateway. HSRP has been covered in few RouterFreak’s articles such as: Comparing HSRP vs VRRP How to configure HSRP on a Cisco router First Hop Redundancy …

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GNS3 network simulator for CCNA

gns3 ccna

GNS3 network simulator has become part of the daily work for many network engineers around the world. It became so popular that it even surpassed other network virtualization training solutions. It all started with Dynamips  written by Christophe Fillot in 2005. The software was used for emulation of some of …

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The 10 best books for Network Engineers

books for network engineersbooks for network engineers

When I started my career in computer networking, I wish I knew the best books for Network Engineers. Many people think that nowadays books are obsolete since everything can be googled in few seconds, but online information is sparse and often not reliable. From my experience, there are plenty of differences in …

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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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