Understanding MPLS label swapping vs stacking: tracing label forwarding tables across router hops showing how labels are replaced at each hop using LDP distribution, with example traceroute output demonstrating label swapping through P/PE routers to destination.
Troubleshooting OSPF duplicate router IDs in VPLS networks: discovering 10-second route flapping caused by cloned PE router configuration, identifying router ID duplication, and understanding network-wide effects of duplicate router identifiers in MPLS service provider deployments.
Building MPLS Service Provider networks from scratch: implementing VPLS on MikroTik and full L3VPN on HPE Comware, configuring LDP label distribution, understanding MPLS benefits for latency reduction and QoS, and managing customer VRFs with vpnv4 BGP peering.