With the amount of configuration involved in a typical L3VPN configuration, troubleshooting process can get pretty chaotic, especially in a time-constrained environments like CCIE lab. That’s why it is extremely important to have a well-structured approach to quickly narrow down the potential problem area. I used the below algorithm while preparing for my lab exam. Like most of the networking problems, troubleshooting of L3VPNs can and must be split into two different phases - control plane...
