I have a question about NTP. We want to setup our core switches as NTP master for our network.
We have three data centers.
- Site A : Two Nexus as core
- Site B : two Nexus as core
- Site C : two 6800 (in VSS, so it's kind of one logical switch) as core
In sites A and B, we have servers. In site C, we have servers and clients.
We want our network devices (servers, clients, etc) to get their time from these switches.
I was thinking about setting external NTP servers from the internet on these switches and connect them as NTP peers.
Should we connect all cores switches (from all three sites) as "NTP peers" all together (kind of full mesh setup)?
Should each site have their local switches connected as peers, Except Site C, which a one logical switch?
Should all clients/servers be configured to use all NTP servers (so their list of NTP servers will be all switches from all sites over WAN)?
Clients/servers should only have their local NTP servers configured?
Should all core switches acting as NTP masters have their clock sync with NTP servers on the internet?
Only some NTP masters should be connected to the internet for external sync? If so, would you chose a dedicated site for this or one switches in each site?