On the IOS you are missing the "aaa authentication enable " command. you need it. otherwise it will use the default local.   on the ASA what is this command and why it is pointing to a different aaa group? aaa authorization exec authentication-server

Pretty sure, this is a config issue. Please post the config here : EIGRP is getting hellos only and then flaps. so it is not communicating properly: 1- NHRP /ESP are not passing through  2- redistributing NBMA into overlay and i do not think it is th...

Hi,   Are you setting this up as part of ASA failover aka high availability or just a back up ASA to be used if needed and where you copy the configuration manually?    if it is the first case no need to copy all the config, just put the failover con...