The authentication of VPN users with redundant radius is very easy to configure for the ASA. Only the following configuration lines are required for this.

aaa-server RADIUS protocol radius
max-failed-attempts 2
aaa-server RADIUS (LAN) host 10.10.10.1
key „password“
radius-common-pw „password“
acl-netmask-convert auto-detect
aaa-server RADIUS (LAN) host 10.10.10.2
key
radius-common-pw „password“
acl-netmask-convert auto-detect