Forum Discussion
Dashboard and logs show different bandwidth utilization?
I can't figure this one out, so I figure I'd ask the experts!
I've found multiple times that the performance view or the dashboard on the F5 don't correlate to local traffic logs about bandwidth. I've seen this multiple times, but here is an example from yesterday with my 200Mbps LTM.
The dashboard showed this (grabbed historic from performance statistics).
At the same time, I was getting flooded with messages like this from my system local traffic log.
Tue Jun 27 08:05:06 PDT 2017 notice PERF-F5 tmm[11064] 01010045 Bandwidth utilization is 244 Mbps, exceeded 75% of Licensed 200 Mbps
I've looked at it multiple times and it just doesn't add up. I've had this issue in multiple environments. Can someone explain to me where I can actually see the bandwidth I'm using if it's not being represented in the dashboard?
Thanks!
- P_KAltostratus
which version are you running?
- MH1_273408Nimbostratus
This particular LTM is 13.0.0 build 0.0.1645.
- MH1_273408Nimbostratus
I also have others that are varying versions of 12-13 with which I have the same issues.
- Samir_Jha_52506Noctilucent
Have you seen these article?
sol15831: How the BIG-IP VE system enforces the licensed throughput rate
https://support.f5.com/kb/en-us/solutions/public/15000/800/sol15831.html
sol14356: Determining the maximum allowed throughput rate on the BIG-IP VE system
https://support.f5.com/kb/en-us/solutions/public/14000/300/sol14356.html
- MH1_273408Nimbostratus
Thanks for your response. Unfortunately it doesn't answer my question. I don't have any instances where I run more than one TMM, so even with the (albeit a bit strange) model how F5 monitors throughput, the math still doesn't add up. Even if my above example had 50Mbps ingress and egress, (which it's not) I still don't see how it's measuring more than 200Mbps. ??
- srNimbostratus
you'll have to add IN and OUT traffic and multiply by 2 (interfaces) and you'll get closer to the logged value. I noticed same thing during some benchmark tests. cheers.
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