Category Archives: BGP

THE BGP BEST PATH SELECTION ALGORITHM: #2. LOCAL PREFERENCE

In this video tutorial we continue examining the BGP Best Path Selection Algorithm by looking at the 2nd criteria: LOCAL PREFERENCE. This BGP Well-Known Discretionary BGP Path Attribute, which is communicated to iBGP peers, is used to influence the OUTBOUND flow of traffic from your local Autonomous System (AS). We take a look at packet captures via Wireshark to see just how it all happens in the BGP Update messages!  Enjoy!