02-12-2015 02:10 PM - edited 03-01-2019 06:03 AM
The following technote is written against Application Policy Infrastructure Controller
Version: 1.0(2m). The following information may not apply to earlier or later versions of Application Policy Infrastructure Controller firmware versions.
Table of Contents for this Technote on Date & Time Policy configuration for the ACI fabric.
Note: this is a text representation of the topics discussed in the attached document for Date & Time Policy configuration. Attached is a PDF file with the complete Technote information.
Chapter 1 - Introduction
Chapter 2 - Preparing the ACI Fabric for Date & Time Policy
Chapter 3 - Configuring a Date & Time Policy using Network Time Protocol (NTP)
Chapter 4 - Verify Date & Time Policy using Network Time Protocol (NTP) is Applied and Operational on APICs and Switches
Chapter 5 - Additional information for Troubleshooting Date & Time Policy using Network Time Protocol (NTP) on APICs and Switches
Document Teaser
Verify Date & Time Policy using Network Time Protocol (NTP) is Applied and Operational on APICs and Switches
Verify the configuration of NTP Services for Controllers and Leaf\Spine Switches in your ACI fabric. This section will provide references for CLI commands and tools that may be helpful in troubleshooting the configuration and application of the Date & Time policy for Controllers and Leaf\Spine Switches in your ACI fabric.
This section will:
Note: The examples given in this section of the Technote are not totally inclusive. These are just some examples that I have gathered while troubleshooting NTP Services for the ACI Fabric.
Task 1 Verify configuration of Date & Time Policy (NTP) on APIC Controllers
SSH to APIC Controllers and perform the following actions:
CLI Commands
Task 2 Verify configuration of Date & Time Policy (NTP) on Leaf\Spine Node Switches
SSH to LEAF\SPINE NODES and perform the following actions:
CLI Commands
Additional information for Troubleshooting Date & Time Policy using Network Time Protocol (NTP) on APICs and Switches
Note: In regards to display questions with Date & Time. The TimeZone parameter alters the TimeZone configured and displayed on the CLI of the APIC. For example, when using the DATE command. A symbolic link is created for localtime to zoneinfo.
ie. localtime -> /usr/share/zoneinfo/America/New_York
The display format local\utc and Offset State configuration is for what is "displayed" for Current System Time on the status bar of the APIC GUI. This information is retrieved from the API using "topInfo". In versions 1.0(1x) and 1.0(2x), there is no adjustments in relation to Daylight savings. As a result, you may see a time differential of 1 hour from the actual time. In the next FCS release, Daylight Savings will be accounted for in the Offset State.
Check System Time on DEVICES
On APIC:
Visore:
CLI:
Sample of Information to Request from Customer to assess Date & Time Issues:
From an APIC Controller
From a Leaf node
From a Spine node
Attached: aci-buzzfeednews-datetime.pdf
Hi Tomas,
nice step-by-step instruction, BUT from where do I get the Phyton script for the root access?
Looks like an internal link,
Thanx for help, Fabian
Fabian,
Yes, "currently" root access requires a TAC Case since the Password generation tool is an internal resource.
There is an effort to get certain commands like the "hwclock" commands accessible via the "admin" user. Then Root would not be needed.
I left the section showing this so that you and others can be aware that if you are having Fabric Discovery issues, you can look at your Date\Time status on the Leaf\Spine\APICs to identify a "possible" cause,
NTP should be used to try to avoid Date\Time Drifts but if NTP is not configured there is a necessity to sync system running clocks to hardware clocks.
Thank you for using the Cisco Support Community!
T.
Hello Leon,
Is it possible to use the ACI devices as a NTP server for the rest of the network? let's say the spine switches.
thanks
Michel van Kessel
Hi,
Even I have same requirement to make ACI as clock provider to rest of the network. Can any body help on this ,Is it possible configure Aci fabric to provide clock to other servers/devices on the network.
Hi,
ACI fabric providing NTP service will be available with ACI 3.1.
Thanks,
Julien
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