We have a problem with processing IPFX packets from Mikrotik routers because Mikrotik IPFIX dont containt
systemInitTimeMilliseconds. Mikrotik IPFIX containt only flowStartSysUpTime and flowEndSysUpTime Information Elements to
absolute times without knowing the systemInitTimeMilliseconds.

The absence of the value of systemInitTimeMilliseconds in the IPFIX packet makes it difficult for us to count
bandwidths.

Our problem is also described as one of the possible in the RFC 5153 https://tools.ietf.org/html/rfc5153

> 4.7. Devices without an Absolute Clock
>
> Exporting just relative times in a device without an absolute clock
> is often not sufficient. For instance, observed traffic could be
> retained in the device's cache for some time before being exported
> (e.g., if the Exporter runs once per minute), or stuck in an Inter
> Process Communication (IPC) queue, or stuck in the export stack, or
> delayed in the network between the Exporter and Collector.
>
> For these reasons, it can be difficult for the Collecting Process to
> convert the relative times exported using the flowStartSysUpTime and
> flowEndSysUpTime Information Elements to absolute times with any sort
> of accuracy without knowing the systemInitTimeMilliseconds.
> Therefore, the sending of the flowStartSysUpTime and flowEndSysUpTime
> Information Elements without also sending the
> systemInitTimeMilliseconds Information Element is not recommended.

We really hope for your help in adding the systemInitTimeMilliseconds to your IPFIX implementation
We opened the ticket almost a month ago, but the answer from Mikrotik did not receive.

I also have a ticket open for the same problem.

I have not had an update for around 5 months.

Mikrotik answered - briefly - do not wait.

Hello,

Thank you for your suggestion. At the moment we do not have plans to add such parameter, however, if more people would start to look for such functionality, we will consider adding this on future RouterOS versions.

Good luck and have a nice day!

Best regards,
Martins S.

--
MikroTik.com

Same issue here... Is impossible to calculate the time was been exported the flow.
In https://www.iana.org/assignments/ipfix/ipfix.xhtml is clear the importance of this field.
Some news mikrotik?

I'd like to jump in here as well. Right now, you have to approximate using the flow receipt time, which is not accurate. It should be fairly strait forward to add this as you are setting it already in the header of both the v5 and v9 streams. So, it's basically copy and paste into the IPFIX template.

If this is OSS, send me a PM, maybe I can take a peak.

Do not care already. I changed the vendor.

Funny, which vendor? I like the Mikrotik even with this tiny bug.