Cisco Viptela NTP Configuration

Introduction

NTP configuration is a basic system property which is configured at a system-wide level on all VIPTELA devices to keep their clocks synchronized. We configure the IP address or DNS name.

Configuration Steps

We can configure up to four NTP servers on a VIPTELA device and all these NTP servers must be located under same VPN. The server having the highest stratum value will be used. The stratum value of NTP server can be checked with the below command:

Key-id can be any value from 1 to 65535 and md5 key can be clear-text or AES-encrypted key.

To use an MD5 authentication key for an NTP server, the key must be configured to be trusted:

Finally, associate the MD5 authentication key with the NTP time server:

We can also define the source interface or IP address for the NTP packets as below:

Other devices are allowed to ask a Viptela device for the time, but no devices are allowed to use the Viptela device as an NTP server.

We can also configure time-zone on VIPTELA devices which by default is UTC.

Additionally VIPTELA devices in lab or testing environment can have the time configured locally on them but this setting is over written once the NTP configuration is done on the device.

Useful commands for verification of NTP setting as below:

Continue Reading:

Introduction to Cisco SD-WAN (Viptela)

Cisco Viptela Network Interfaces

ABOUT THE AUTHOR

Rashmi Bhardwaj

I am here to share my knowledge and experience in the field of networking with the goal being – “The more you share, the more you learn.”

I am a biotechnologist by qualification and a Network Enthusiast by interest. I developed interest in networking being in the company of a passionate Network Professional, my husband.

I am a strong believer of the fact that “learning is a constant process of discovering yourself.”
– Rashmi Bhardwaj (Author/Editor)