On R1 i have:
ntp authentication-key 1 md5 Cisco
ntp authentication-key 2 md5 Cisco2
ntp trusted-key 1
ntp server 184.108.40.206 key 1
Router R2 with enabled authentication is connecting to R1 as a client.
What keys R1 will use to sign replies to R2 ? Are the key numbers globally significiant ? (like in EIGRP chain). How R1 chooses how to sign replies ?