Comprehensive and Detailed In-Depth
NTP (Network Time Protocol) synchronization is critical for Grid operations, and NIOS CLI provides
status via show ntp:
Output Format: Lists NTP servers with symbols:
*: The server the member is currently synchronized to (stratum and offset shown).
+: Candidate server (reachable but not primary).
-: Unreachable or rejected server.
Asterisk Meaning: Indicates the active sync source, ensuring time consistency across the Grid.
Options:
A: Unreachable servers get a “-” or no symbol, not “*”. Incorrect.
B: Matches NTP convention and NIOS behavior—synchronized server. Correct.
C: Offline servers don’t sync and lack “*”. Incorrect.
D: Disabled NTP would prevent stats display, not mark a server. Incorrect.
Practical Example: In an INE lab, you’d run show ntp, see “*pool.ntp.org,” and troubleshoot time
drift if the asterisk shifts, testing Grid stability.
Reference: Infoblox NIOS CLI Reference Guide – NTP Commands; INE Course Content: NIOS DDI Grid
Troubleshooting.
