Sunday, January 10, 2010

Networking Lab Series: LAB 1 PART 2

This is the second part of the Networking Lab Series: LAB 1.

Lets start with some review questions and analysis from PART 1:
  • What happened when you did the mutual redistribution CE to PE between EIGRP and BGP?
    • Besides the "redistribute bgp xxx" under EIGRP, What was required for EIGRP to advertise the routes learned from BGP into the EIGRP domain?
      • REASONING:
        • EIGRP, unlike other routing protocols, use a composite metric made of 5 metrics:
          1. Bandwidth (minimum along path)
          2. Delay (cumulative along path)
          3. Reliability
          4. Load
          5. MTU

        • When redistributing from other protocols you will need specify the metrics

Monday, January 4, 2010

What is the MPLS VPN Label?

In the MPLS world the concept of labels and stacking labels are used all the time. When running MPLS L3VPNs each route from the CE will end up with at least two MPLS labels: one commonly referred to as the VPN Label and the other referred as the IGP label.


Lets explore what really is the VPN Label. Is it a single label? or a stack of labels? or maybe a group of labels?. Lets analyze it.

Saturday, January 2, 2010

Networking Lab Series: LAB 1 PART 1

Many of my friends have asked me to mentor them or do customized training for them, well, even when I want, I can't have the time on regular basis. So, I have decided to post some exercises here so they can go step by step. (I should warn that this is not for beginners).

NOTE: THE EXERCISES HERE ARE FOR LAB ONLY. DO NOT ATTEMPT THEM IN PRODUCTION ENVIRONMENT NOR USE THEM AS TELECOM GOOD PRACTICES.