RFC2661
Layer 2 Tunneling Protocol "L2TP"
RFC3145
L2TP Disconnect Cause Information
RFC3301
Layer Two Tunnelling Protocol (L2TP): ATM access network extensions
RFC3308
Layer Two Tunneling Protocol (L2TP) Differentiated Services Extension
RFC3437
Layer-Two Tunneling Protocol Extensions for PPP Link Control Protocol Negotiation
RFC3573
Signaling of Modem-On-Hold status in Layer 2 Tunneling Protocol (L2TP)
RFC3817
Layer 2 Tunneling Protocol (L2TP) Active Discovery Relay for PPP over Ethernet (PPPoE)
RFC3931
Layer Two Tunneling Protocol - Version 3 (L2TPv3)
RFC4045
Extensions to Support Efficient Carrying of Multicast Traffic in Layer-2 Tunneling Protocol (L2TP)
RFC4454
Asynchronous Transfer Mode (ATM) over Layer 2 Tunneling Protocol Version 3 (L2TPv3)
RFC4591
Frame Relay over Layer 2 Tunneling Protocol Version 3 (L2TPv3)
RFC4623
Pseudowire Emulation Edge-to-Edge (PWE3) Fragmentation and Reassembly
RFC4667
Layer 2 Virtual Private Network (L2VPN) Extensions for Layer 2 Tunneling Protocol (L2TP)
RFC4720
Pseudowire Emulation Edge-to-Edge (PWE3) Frame Check Sequence Retention
RFC4951
Fail Over Extensions for Layer 2 Tunneling Protocol (L2TP) "failover"
RFC5085
Pseudowire Virtual Circuit Connectivity Verification (VCCV): A Control Channel for Pseudowires