Troubleshoot VPN Tunnel Phase 1 (IKE) Failures

Cisco ASA IKEv1 and IKEv2 Support for IPSEC IETF proposed an updated Internet Key Exchange (IKE) protocol, called IKEv2, which is used to simplify and improve the legacy IKE protocol (IKEv1). Cisco ASA introduced support for IPSEC IKEv2 in software version 8.4(1) and later. In this ASA version, IKEv2 was added to support IPsec IKEv2 connections for AnyConnect and LAN-to-LAN VPN Troubleshoot VPN Tunnel Phase 1 (IKE) Failures Jun 18, 2019

Cisco IOS and IOS XE Software Internet Key Exchange

This document describes version 2 of the Internet Key Exchange (IKE) protocol. IKE is a component of IPsec used for performing mutual authentication and establishing and maintaining security associations (SAs). This version of the IKE specification combines the contents of what were previously separate documents, including Internet Security Association and Key Management Protocol (ISAKMP, RFC IKE version 2 at a glance. - Cisco Community

Nov 14, 2011

FAQ-What are the differences between IKEv1 and IKEv2- Huawei The IKE SA negotiation will be started again when the device has IPSec traffic to handle. In IKEv2 mode, the retransmission interval increases from 1, 2, 4, 8, 16, 32 to 64 seconds. If no reply is received within eight consecutive transmissions, the peer is considered dead, and the IKE … RFC 7296 - Internet Key Exchange Protocol Version 2 (IKEv2)