NPM Router metrics - details

robert777

Hi All.

I'm working with a no-kidding data scientist to analyze router metrics in my organization.

Pulling Interface Traffic from routers.  At this point we're experimenting with Interface polling at the default 9 minutes and also 15, 30 minutes.

Question: my customer is asking...

InAvgBps

OutAvgBps

Does this represent a) average of router-internal records over the pulling period, b) some point-in-time reading, or other?

Can anyone offer guidance on what these values represent?  In general we're polling from Cisco 7000 series routers.

Thanks in advance for any responses.

robert777

I've got a (potential) answer.  Found a Cisco document that explains bits-per-second from that vendor's perspective (link below).

According to this document Cisco calculates bps on a weighted average over 5 minute moving window.

Translated into Solarwinds terms, if I poll my interface every 9 minutes, I get the Cisco last 5 minutes weighted average, not the last 9 minutes average.  If I poll every 30 minutes I still get the (Cisco) last 5 minutes weighted average, not the 30 minute average.

To be clear, I'm not a router guru.  My experience lies more on the Server/SQL side of the house. 

Thanks in advance for any comments, questions, or corrections.  Link below:

www.cisco.com/.../12816-3.html