BGP Best Path Selection Algorithm

Thanks for visiting! If you’re new here, you may want to subscribe to my RSS feed. This blog posts regular tutorials, news, and study tips about networking, especially about Cisco CCIE related topics. Go ahead, subscribe to the rss feed! You can also receive updates from this blog via email. Thanks for visiting!I found this [...]

IP Routing Protocols FAQs

I was trolling through the Cisco website and I found this awesome list of Freqently asked questions created by Cisco in its IP Routing Technology Q&A webpage. Check them out, they are definitely recommended reading for a CCIE candidate:

IP Routing: Frequently Asked Questions,
BGP: Frequently Asked Questions,
OSPF: Frequently Asked Questions,
EIGRP: Frequently Asked Questions,
ODR: Frequently Asked Questions.

NetKit - Full Network Emulation on Linux

Just found about NetKit thanks to a follower on twitter (I’m starting to love twitter!).
“Netkit has been conceived as an environment for setting up and performing networking experiments at low cost and with little effort. It allows to “create” several virtual network devices (full-fledged routers, switches, computers, etc.) that can be easily interconnected in [...]

Tutorial: BGP Conditional Route Injection with inject-map

One of the great new features that was introduced in IOS 12.3 is BGP conditional route injection. With conditional route injection we can insert more specific routes into a BGP table based on the existance of another route. Most of the routes in the current internet BGP table consists of aggregate routes. This is used to minimize the size and number of routes in global BGP routing table. The aggregation of routes can sometimes obscure more specific and accurate routing information. Wouldn’t it be cool if we could control and “un-aggregate” those routes on demand? Well that’s kinda what BGP conditional route injection does. It allows us to originate a more specific prefix into the BGP routing table based on an existing aggregated route.

Blog: CCIE Assessor Lab A

I just finished my CCIE Assesor Lab A. I got 72%. I have mixed feelings about this one. The script looks for very specific answers but it gave you a fantastic insight on what Cisco is looking for in terms on configuration and how they mark your exam….

BGP allowas-in, BGP local-as tips and tricks…

BGP Local-AS
BGP allows you to manipulate your Autonomous System (AS) number in a number of different ways including confederations, local-as, and remote-as commands. This article focuses on manipulating your AS as seen by other remote AS’s using the local-as command. We will also look at some tips and tricks using this in conjunction with BGP [...]