Juniper Networks, Inc.
Layer 2 tunnel protocol ("L2TP") node processing optimization using a dedicated hello channel keepalive mechanism

Abstract:

A separate dedicated channel is set up and used for tunnel keepalive exchanges. Using such a dedicated channel permits tunnel keepalives to be processed completely at forwarding plane, without needing to send them to the control plane for processing. This dedicated channel can implement its own sequencing (in a way that avoids the need to use the control plane for processing). Alternatively, this dedicated channel might not use sequencing at all.