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// < ![CDATA[ google_ad_client = "ca-pub-5272078080280462"; /* upper-left-sq */ google_ad_slot = "5606795637"; google_ad_width = 200; google_ad_height = 200; // ]]> Everyone who ever studied BGP knows that BGP has strong rules to prevent routing and updates loops. In this post I will focus on iBGP loop prevention and specifically route reflectors as a result. The rule states: [...]

Lets continue our BGP performance tuning discussion. Sorry for the long delay but I was deeply busy in some other stuff. During the last couple of days I’ve attended Cisco Expo 2009, and during the SP – IP Core Technical Breakout, the breakout speaker highlighted Cisco’s high availability features, while focusing on BGP he introduced [...]

Today, we received an email from AfriNIC stating that starting from January 2009 they are going to assign 4 bytes AS numbers by default unless otherwise specified. They are asking providers to upgrade their routers to support the new format. I thought it may be nice to explore the story with you without delving in [...]

As we agreed in the last post, we are going to discuss the available tools and parameters for BGP performance tuning. In this post we are going to start discussing the different types of timers that BGP uses for its operation.

It is a very critical matter for a network architect (the same goes for a network operator but with a different prospective) to understand the inside out of tuning the routing protocols performance, in order to be able to conduct an appealing and effective low level design for small to large scale networks. We have [...]

BGP has multiple ways of advertising a default route to its neighbors;  the neighbor default-originate command is one of these methods and used to advertise a default route to a specific neighbor. Below are some characteristics of the default route advertised by this way. Originator router: Default route does not need to be existing in [...]