| Feature hierarchy | Feature Name |
|---|---|
| Carrier-of-Carrier VPNs / | BGP L3 VPN Carrier-over-Carrier and Inter-provider |
| Carrier-of-Carrier VPNs / | CCC & TCC: Ethernet and Per VLAN CCC/TCC encapsulations |
| Carrier-of-Carrier VPNs / | Carrier's Carrier (CSC) Layer 3 VPNs |
| Carrier-of-Carrier VPNs / | Carrier-of-Carrier (CSC) VPN: Nonstop routing, NSR |
| Carrier-of-Carrier VPNs / | Carrier-of-Carrier (CSC) VPNs |
| Carrier-of-Carrier VPNs / | Carrier-of-carrier (CSC) VPNs: Native IPv6 |
| Carrier-of-Carrier VPNs / | Interprovider VPN's |
| Carrier-of-Carrier VPNs / | Pseudowire Emulation Edge to Edge (PWE3) Control Word for use over an MPLS PSN |
| Carrier-of-Carrier VPNs / | Pseudowire Emulation Edge to Edge [PWE3 (signaled)] |