The configuration in Example 33-8 works, but in many…
““The configuration in Example 33-8 works, but in many cases, routers might have multiple ntp server commands configured for redundancy. The goal is to have at least one usable clock source (servers per multiple ntp server commands, or internal clock as per the ntp master command). The router then chooses the best NTP clock source based on the stratum level. The stratum level defines the quality of the clock source; the lower the stratum, the better the source.””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
Routers can list multiple NTP servers for redundancy, selecting the best based on stratum, which indicates clock quality.
In simple terms: Multiple NTP servers provide backup; lower stratum means better clock.
Key Takeaway
Configure several NTP servers and let the router pick the optimal one.
Themes
redundancy
network reliability
time synchronization
Mood
technical
practical
Type
instructional
operational
When to use this quote
- enterprise routers
- data center timing
- remote office synchronization
Key Concepts
NTP
stratum
clock source selection
Questions to Reflect On
- How do you verify stratum levels of NTP servers?
- What fallback occurs if all servers fail?
A Different Perspective
If all servers share the same stratum, redundancy offers no quality improvement.