The OSPF Sham Link Table. The OSPF Sham Link Table configures sham links over the provider BGP/MPLS IP VPN backbone as part of OSPF PE-CE protocol function. This table is only used if ospfPmEntVpnPeCeSupport is true. Each sham link runs the full OSPF protocol between two PE routers using MPLS tunnels to carry OSPF packets across the provider backbone. The sham link is viewed as part of the VPN and is handled by the OSPF instance for the VPN running on each PE router. It is independent of the provider backbone and independent any OSPF instance for the provider backbone. The sham link is identified by its endpoint addresses on the two PE routers. These sham link endpoint addresses are addresses assigned to the PE routers but belonging to the VPN address space. They are independent of the provider backbone address space.