Could you explain or help me understand the advantages and disadvantages of this?
Hi, we use the QOS/MIR for our customers antennas to traffic shape their packages.
Why don’t they do it on the edge? Isn’t that adding more work to the radio processor?
We do bandwidth shaping/MIR enforcement at the edge using Cambium QoE… but QoS is best left on the SM as its available bandwidth can change due to various conditions. And yes, typically having the radio do shaping and QoS does take resources, but on the ePMP series, not enough to degrade the overall performance of the radio.
We ruled out Cambium QoE because in our network each tower has an edge, that would mean installing a QoE for each tower and the implementation would be expensive $$$
- What do you propose to do in our case?
Using QoE in the subscriber is also licensed and the trial version for subscribers I think is no longer available or at least I can no longer see it… I was testing it in trunks and I was testing it in force300-25
In the case of trunk after a while the SM lost web access and had to reboot it by force
In the case of force300-25 it worked and also after a long time the web access was lost and had to reboot the power
Both tests were very good.
- What do you propose for economic SM?
I’m going to re-enable it on the force300csm in bridge mode with firmware 5.8.0. Let’s wait and see how it behaves.
I believe there is some confusion here. I’m talking about MIR (maximum information rate) shaping and QoS prioritization (for tagged VoiP and other sensitive packets). You’re displaying a screen shot for the DPI traffic priority service, which we do not use, and I’d probably keep it disabled if I were you. DPI services definitely use a lot of resources to the point where I think radios can become unstable. I’m not certain where the ePMP dev’s are headed with DPI services on the radios. I believe development of the DPI services has stalled for quite some time now (over a year) as development resources have been focused on e4k features like beamforming, MU-MIMO, TDD optimization, etc. There’s also been talk of maybe scrapping DPI and replacing MIR and QoS with something like fq-codel… but who knows when any of this will happen… could take years.
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Thank you for your time… it is true what you say…
- DPI consumes a lot of resources
- it is true that QoS is not the same as DPI
- with DPI the radios are blocked from accessing via the web until you have to reboot the power
- The DPI graph provides valuable information that could be used for QoS planning
Could you give me an economical QoS alternative? that does not involve buying a QoE device for each tower
Note: if you want to know about DPI here is a link: Smart QoS and Deep Packet Inspection (DPI) feature
I really don’t have a good recommendation for you (maybe LibreQoS?). I do know it’s possible to buy one large Cambium QoE license (e.g. 10gbps) and then split that up in as little as 1gbps chunks between multiple sites (e.g. 10 different 1gbps appliances). 1gbps capable appliances can be had for under $500 these days… with 10gbps appliances running for about $1000.
In regards to your ePMP DPI link, you’ll notice it hasn’t been updated since spring of 2022.
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From what I’ve been told, we can’t actually buy a QoE appliance device from Cambium anymore anyway. It seems like (unfortunately / fortunately) it’s all homemade solutions - so you can get a ton of power & capacity for just a few hundred dollars. (if you can figure out how to get it working)
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I would second libreqos as a budget alternative. The base functionality is free, LTS is paid but still not that expensive.
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I would like to know in which part of your network you use QoE, since I have pppoe and I understand that I could not use it if I put it in front of the pppoe server
and if I put it behind the pppoe server I could do QoE but to all the traffic generated by the pppoe clients (not to each client in particular)
How are you using it and what results have you obtained?
I forgot to say that I already have a Cambium QoE in my hands to perform tests 
We use it at our head end (multiple DIA’s → Mikrotik Router → Cambium QoE Box → Switch → rest of our network).
I’d suggest that you migrate away from PPPoE. It’s antiquated and can cause more issues when used with newer networks.
Cambium QoE features like ACM, TCPO, and MIR and DPI shaping work great for lower end tiers behind AP’s that are at or over capacity. Even if you don’t use DPI shaping, DPI monitoring is very useful for support staff.
What do you recommend I use instead of PPPoE?
PPPoE has worked very well for us so far 