nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

where NTP runs in multiple VDCs, the network administrator can select which VDC owns
the system clock on the supervisor. This VDC then updates the system clock and
synchronizes time on all linecards in the chassis. Example 7-54 illustrates specifying a
specific VDC that will control the system clock.
Example 7-54. Configuration of a Specific VDC to Own the System Clock
Click here to view code image
N7K-2# config
Enter configuration commands, one per line. End with
CNTL/Z.
N7K-2(config)# clock protocol ntp vdc 1
N7K-2(config)# end
N7K-2#
A typical NTP configuration in NX-OS consists of specifying the IP address of the NTP
servers and the source interface the device will use for the source IP of all NTP packets. If
no source interface is specified, the device uses the IP address of the interface that is used to
egress toward the NTP server. Example 7-55 illustrates a typical NTP configuration.
Example 7-55. NTP Configuration in NX-OS
Click here to view code image
N7K-2# config
Enter configuration commands, one per line. End with
CNTL/Z.
N7K-2(config)# ntp server 10.89.64.1 use-vrf management
N7K-2(config)# ntp source-interface mgmt0
N7K-2(config)# end
N7K-2# show ntp peer-status
Total peers : 1
* - selected for sync, + - peer mode(active),
- - peer mode(passive), = - polled in client mode
remote local st poll re
delay vrf
----------------------------------------------------------
---------------------
*10.89.64.1 172.26.251.21 2 64 37
management
N7K-2#
Precision Time Protocol