I am trying to connect an L2TP client to Cisco ISR 4321 router (I have previously done this successfully with 29xx series). The client connects, the virtual interface comes up, IP address gets assigned and a route for the assigned ip gets added to the routing table just like I expected it to.
Configuring L2TP over IPSec VPN on Cisco ASA – IT Network L2TP is a combination of PPTP and Layer 2 Forwarding (L2F), a technology developed by Cisco. L2TP combines the best features of PPTP and L2F. Even the underlying tunneling technology still utilizes PPP specifications. the encryption is done by IPSec in transport mode. L2TP/IPSec protocol uses UDP … Layer 2 Tunneling Protocol - Wikipedia In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. It does not provide any encryption or confidentiality by itself. Rather, it relies on an encryption protocol that … L2TPv3 (Layer 2 Tunnel Protocol Version 3)
RFC 3193 - Securing L2TP using IPsec
Configuring an L2TPv3 Ethernet Pseudowire | Network World As I mentioned last time, L2TPv3 has a plethora of capabilities, including the capability to be used for remote access VPNs, the capability to transport a number of Layer-2 protocols in a
Cisco IOS Software Layer 2 Tunneling Protocol (L2TP
Private Internet Access via L2TP IPSEC Cisco IOS Client