Cisco Mds 9000 Family Nx-Os Fundamentals Configuration Guide - Cisco MDS 9000 Series Configuration Manual

NTP
If an active server fails, a configured peer helps in providing the NTP time. To ensure backup support if the
active server fails, provide a direct NTP server association and configure a peer.
If you only configure a peer, the most accurate peer takes on the role of the NTP server and the other peer
acts as a peer. Both devices end at the correct time if they have the correct time source or if they point to the
correct NTP source.
Not even a server down time will affect well-configured switches in the network. This figure displays a
network with two NTP stratum 2 servers and two switches.
Figure 8: NTP Peer and Server Association
In this configuration, the switches were configured as follows:
• Stratum-2 Server-1
• Stratum-2 Server-2
• Switch-1 IPv4 address-10.10.10.1
• Switch-1 NTP configuration
• Switch-2 IPv4 address-10.10.10.2
• Switch-2 NTP configuration

Cisco MDS 9000 Family NX-OS Fundamentals Configuration Guide

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◦ IPv4 address-10.10.10.10
◦ IPv4 address-10.10.10.9
◦ NTP server 10.10.10.10
◦ NTP peer 10.10.10.2
◦ NTP server 10.10.10.9
◦ NTP peer 10.10.10.1
Configuring NTP
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