From the course: Cisco Network Security: Secure Access
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Configure and verify security for Network Time Protocol - Cisco Tutorial
From the course: Cisco Network Security: Secure Access
Configure and verify security for Network Time Protocol
- [Instructor] The concept of accurate time on a network is very important. Syslog audits and logs events, which you can use to track problems and troubleshoot issues. In addition, some protocols such as Kerberos require synchronized time on the network. Periodically, I check my wall clock with a more official source here at time.gov. On a Cisco router, there are two types of clocks. A hardware clock that's battery powered, and is referred to as the calendar in the IOS. A software clock, which is the primary source for time, and is referenced as the clock in the IOS. The software clock runs from the moment the system is up, and can be updated from a number of different sources, such as Network Time Protocol, Simple Network Time Protocol, VINES Time Service, and manual configuration using the hardware clock. Because the software clock can be dynamically udpated, it has the potential to be more accurate than the hardware clock. To update the software clock on an enterprise network, we…
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