R720 upload slow compared to R710 (Controlled by ZoneDirector 1200 10.1.1.0 build 55)

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Hi

Situation (in basic/short - maybe little too basic):

4 WLAN's deployed. About 20AP's (different models).

R710 controlled by ZD 1200 - everything related UL/DL speed seems to be fine from client perspective (different laptops). Did some basic test using "speedtest.net" DL/UL is about around 140Mbit which is expected since our ISP gives us 150Mbps uplink.

Then I replaced R710 -> R720 and some weirdness begins - DL is ~140Mbps which is okay but UL is about 1....6Mbps!!!
Checked cabling, tried different PoE adapters, tried different switch ports, tried another R720, tried some other various possibilities - nothing.
Only thing that I'v noticed that makes some kind of difference is when I strart playing with "SSID Rate Limiting".
When the problem starts, there were no rate limiting on this particular WLAN, but when I set rate limiting to 200Mbps UL/DL, then testing against "speedtest.net" gives us about 80Mbps UL/DL (varies per test).
Also, there were some changes in UL/DL speed on this particular WLAN when I played with rate limiting on another WLAN - I don't understand how this is possible,but it was.
Since I had limited time to test further, I'v sent this R720 back to our reseller and continued with R710.
But I know that I should extend our WIFI infrastructure in near future, so I'm looking for recommendations what else should I do to find out what might be wrong?

BTW: On the time of problem, ZD FW update from 10.1.1.0.35 to 10.1.1.0.55 did not help.
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janx

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Posted 4 months ago

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Darrel Rhodes, Employee

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Hi Janx,

I believe this is a known issue and specifically affects R720 APs in only versy specific, certain circumstances. 

I understand a bypass of the problem can be achieved by connecting the AP to a 2.5Gbps Ethernet connection.

I've been advised by a colleague that a fix has been committed for SmartZone firmware 3.6.2. However I don't have any information regarding a fix for the ZoneDirector software train.

I will see what additional information I can find for you and keep you posted.

Best regards,
Darrel.
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janx

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I see... If You have anything to share regarding this, I would be very grateful.
BTW - I'v played around with AMPDU settings on this particular AP as suggested by our local representative, but no go..
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Darrel Rhodes, Employee

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Hi Janx, thanks for the response.  I can say it's not a settings issue, it requires a fix in firmware.
Thanks,
Darrel.
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janx

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Thank You. Then I will wait.
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Alexey

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I hаve ZD1200 too but not R700. I Do not seen this difference divergent UL/DL during use my RUCKUS WiFi. And do not seen this in RUCKUS docs.
If I were U I could look at:
- Ethernet interfaces (utilisation, speed/duplex) 
- load & band balancing in ZD GUI(try to off them);
- 802.11_b clients PDA. If there is no this PDAs in the air, still the problem happening? 
- Is it possible to switch off 802.11 b/g/n for check the problem in 802.11 a/n/c only?
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janx

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As stated by Darrel Rhodes it is a bug related to somehow with this new 2.5G ports.
But I'v already digged around switches regarding Eth interfaces (we do not have any device supporting 2.5G).
Utilization speed/duplex is fine.
No loadbalancing.
No PDA's
Tried both bands.
Nothing.
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Alexey

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So if U forcibly (not auto) tune the ports  (2,5G & plugged into it) in 1000BASE TX there is no problem repeats again?
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janx

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There were no difference auto vs. manually fixed 1Gbps.
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Darrel Rhodes, Employee

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To be clear, the AP needs to be connected to a 2.5Gbps port for the issue to be bypassed.  As I stated previously: the issue cannot be resolved by changing the configuration of the AP and needs new firwmare code.
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Darrel Rhodes, Employee

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Hi Janx,
Many thanks for your patience.  I've just had confirmation from our Engineering this morning that a fix for this issue will be in in the next ZoneDirector code release.  ETA for this release is late December/early January. 
Check the release notes and the fix should be noted there.
Best regards,
Darrel.
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Robin Koper

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Hello,

What is the ZD firmware release where this problem is fixed?

With kind regads,
Robin
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Freddy Huttner

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Hello,

We also have a problem using R720 with 1Gbps connections. The upstream is the most affected and can be as low as 3Mbps (VERY SLOW!)
The last firmware I can find is from october 2018 (ZoneDirector 10.2.0.0.189 (GA))

Any ETA for the new firmware release with a bugfix for the R720 in combination with a 1 Gbps PoE+ port ?

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Darrel Rhodes, Employee

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Hi Freddy/Robin, this issue has been resolved in ZD 10.1.1.0.62 (MR1 Refresh4) - released on 2019-01-09. The release notes confirm it:

Resolved an issue on R720 APs where wireless clients could experience low uplink throughput if they had previously associated to a WLAN with rate limiting enabled on the same R720 AP. [ER-6567, ER-6576, ER-6830]

I'm not sure when the 10.2.x code-train will be updated unfortunately.

I hope that helps,
Darrel.
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janx

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Hi

Somewhat a good news, but I'm still waiting that this problem will resolved in 10.2.xx version too...
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Darrel Rhodes, Employee

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Hi Janx, we had an internal update earlier today to confirm the fix should be applied in the next MR release of the 10.2.x codetrain.  We don't have an exact date of release but it should be within the next few weeks hopefully.
Thanks,
Darrel.
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Robin Koper

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Hello,

We dont like the idea of running a MR1 firmware on a production environment (around 1000 concurrent clients). We hope the stable release will be out soon.

With kind regrads,
Robin
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janx

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Hi

As much as I have been used those MR releases, they seems to be stable enough.
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Zemiel

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Just updated to 10.2.1.0 build 75 and still having this issue. Any movement on this?