BGP – Controlling the Entry Point (HLD)

From the BGP Design point of view (HLD), there are four options to manipulate the inbound traffic, MED, AS-path prepending, using communities, and breaking aggregated routes.


This is not really useful, as it has to meet some conditions:

  • The AS-path of learned routes should be identical. Thus, this could be only useful when multihoming to the same AS.
  • The BGP peer might use Local-Preference in the Path Selection process.
  • Usually, Service Providers reset or strip received MED.

AS-Path Prepending

It’s not always helpful.

Continue reading “BGP – Controlling the Entry Point (HLD)”

Share this!