R3#sh run | i ntp
ntp authentication-key 1 md5 12341C231B0609 7
ntp authenticate
ntp clock-period 17208083
ntp server 180.40.7.98 key 1
R3#
RACK17AS>4
[Resuming connection 4 to r4 ... ]

R4#sh run | i ntp
ntp authentication-key 1 md5 13280E26020101 7
ntp master 5
ntp server 192.10.32.254
R4#