Hello
You do not say if this rtr is to the an authoritative device (server) or it is a peer(client)
Server =An authoritative server to you own rtr
Peer (client) = An non authoritative server that you can share and sync time with.
Ive never used a N54x however NTP is fairly straight forward from a cli perspective, but you should have two options <server/peer>
Example below relates to a ntp client:
ntp server x.x.x.
ntp server x.x.x.x prefer
ntp peer x.x.x.x
(optional)
access-list x permit <server/peer> = limits the ntp devices you wish to communicate with
ntp access-group peer (access-list x)
ntp authenticate
ntp trusted-key xx
ntp authentication-key xx <auth> <word>
ntp source <interface>
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Kind Regards
Paul
