Specifies the type(s) of authentication, if any, to be negotiated with the peer: none No authentication is negotiated. pap PAP negotiation only. chap CHAP negotiation only. papChap PAP negotiation is attempted first; if fails, attempt CHAP. chapPap CHAP negotiation is attempted first; if fails, attempt PAP. If authentication negotiation is not supported for this PPP interface, then any attempt to explicitely set this object if READ-CREATE maximum access is supported will result in a notWritable error and it will be implicitily set to the DEFVAL on row creation. Setting this object to none(0) will set jnxPppLinkConfigAuthenticatorRouting Instance object to an empty string. This object returns a null(0) value on the get operation. New object jnxPppLinkConfigAuthentication2 will reflect the configured values. Setting this object along with the jnxPppLinkConfigAuthentication2 object will return an inconsistentValue error.