MPLS: OSPF sham-links

Introduction The provider's MPLS cloud has three routers namely - R1 (P-router), R2 (PE-R2) and R3 (PE-R3). These routers formed OSPF adjacency with one another. R2 and R3 are iBGP neighbors peering with each other's loopback address. The TTL propagation within the MPLS cloud was suppressed with no mpls ip propagate-ttl command. This is to … Continue reading MPLS: OSPF sham-links