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

[sven_jaanson]

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.

[DarrelRhodes]

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.

[robin_koper]

Hello,

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

With kind regads,
Robin

[freddy_huttner]

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 ?

[DarrelRhodes]

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.

[sven_jaanson]

Hi

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