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An engineer must configure NTP servers in Cisco Enterprise NFVIS. The primary NTP server has an IP address of 192.168.1.1 and the backup NTP server has an IP address of 192.168.2.1. Which two commands must be run to complete the configuration? (Choose two.)
In Cisco Enterprise NFVIS, time synchronization is configured using the system time ntp command structure. NFVIS requires a primary and optionally a backup NTP server to maintain accurate system time for the hypervisor and guest VMs.
Correct NFVIS command syntax for NTP configuration:
system time ntp preferred_server <IP>
This command configures the preferred (primary) NTP server used for system clock synchronization.
system time ntp backup_server <IP>
This command configures the backup NTP server, which the system uses if the primary becomes unreachable.
These two commands match Cisco NFVIS time-configuration behavior described in NFV infrastructure design and implementation guidelines.
Why the Correct Answers Are A and E
Option A: system time ntp preferred_server 192.168.1.1
This properly configures the primary NTP server in NFVIS. The preferred server is always the first choice for time synchronization.
Option E: system time ntp backup_server 192.168.2.1
This correctly configures the backup NTP server. If the preferred server fails, NFVIS automatically falls back to the backup server.
Both commands directly match NFVIS's NTP command hierarchy and are the only ones that correctly apply to NFVIS.
Why the Other Options Are Not Correct
Option B uses utils ntp, which is not an NFVIS command.
Option C sets manual time and does not configure NTP servers.
Option D also uses the utils ntp syntax, which applies to other Cisco platforms but not NFVIS.