Sure, all of your switches can get their time sync on your 4507R but you don't have to configure "ntp master" to it. Just point your switches to it using the command "ntp server [prefer]".
The reason why I don't recommend a Cisco appliance as an authoritative NTP/SNTP server is because the clock chip is similar to a PC. It doesn't have a dedicated method of verifying. You can, however, let your 4507R synchronize it's own clock with something that is authoritative. You can get a cheap NTP server that uses GPS (best method so far). Another option is to open a port in the firewall to allow the 4507Rto talk to world-wide NTP pool.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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