BGP Communities Local-AS


Scenario:

The company you work for is a large game console development company. They have a large international network and you are responsible for the BGP configuration. One of the ASes is so large that you decided to implement confederations. For security reasons you need to make sure not all prefixes are advertised to all routers within AS 2.

Goal:

  • All IP addresses have been preconfigured for you.
  • Configure AS 2 with the federations AS 10 and AS 20.
  • Configure EBGP between AS 1 and AS 2.
  • Advertise the loopback0 interface on router Wintendo in BGP.
  • Ensure network 1.1.1.0 /24 only shows up in sub-AS 10. Use the correct community to achieve this.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

BGP Communities Local AS

Video Solution:

Configuration Files

You need to register to download the GNS3 topology file. (Registration is free!)

Once you are logged in you will find the configuration files right here.

Opt In Image
Do you want your CCNA or CCNP Certificate?

The How to Master series helps you to understand complex topics like spanning-tree, VLANs, trunks, OSPF, EIGRP, BGP and more.

Written by René Molenaar - CCIE #41726

You May Also Like

About the Author: Rene Molenaar

René - CCIE #41726 is the creator of GNS3Vault.com where he shares CCNA, CCNP and CCIE R&S labs. He also blogs about networking on http://networklessons.com

10 Comments

  1. Hi,
    Im still not sure how to use the Local-as..iv tried to google it as well and followed the examples but no luck. SOlution to this problem wud be nice ;D

  2. I did outbound route map on wintendo to send community local AS to the route 1.1.1.0. Make sure u also use send community command on MacroZoft router otherwise it will advertise route 1.1.1.0 without community to Zony which in turn can advertise it to SEEGA.

    Thanks for the lab reene

    1. Thanks for your comment, this is something to be aware of. Glad you liked it!

  3. Wow, send community (not configured) on MacroZoft gave me the real pain until I saw your demo. Nice labs Rene.

Comments are closed.