In the last blog – “MPLS L3VPN: Label Following Fun with Fish” and its corresponding YouTube show and tell we basically set the stage for this blog and YouTube.  🙂

Last we left our environment, we saw a successful ping between R1’s loopback and R2’s loopback. And we followed the label swapping in the core.

Now they can’t ping each other.  Time to put our Network Detective badge on and go for a ride-along in the Case of the Broken L3VPN.  I always always always learn the most while troubleshooting.  🙂   So let’s go!

FILES:

• All PowerPoint diagrams in PDF format: Fish_Label_Fun.pdf
• Sniffer Trace: Label_Following_Fun.pcap

I suggest downloading the PDF and the PCAP file and then clicking on the YouTube link.

YouTube Link

YouTube Link: https://www.youtube.com/watch?v=TRVHHpaUZ-A&t=