The following sections provide an overview of IKEv1. IKEv1 is superseded by IKEv2, which offers faster, secured key management. For information about IKEv2, see IKEv2 Protocol. For a comparison, see Comparison of IKEv2 and IKEv1. For information that is common to both protocols, see Introduction to IKE. IKEv1 and IKEv2 can run simultaneously and negotiate with their peer protocol on other systems.