topic Ok, success.I think that I've in Wireless

Wifi performance on C887VA-W with iPad Air 2

user889988 — Mon, 05 Jul 2021 10:55:16 GMT

Hi,

I have a C887VA-W with integrated AP802 (equivalent to 1140 or 3500 series AP) supporting 2x3:2 configuration as far as I know.

I'm doing speed tests from a wired FTP server on the LAN to an iPad Air 2 using 802.11n 2.4GHz. I can see the iPad associates with m15 data rate so that indicates that 2 spatial streams are used.

When doing a file transfer I can only get it as high as 26Mbit/s downstream to the iPad and similar value upstream. I also tested with iperf and got the same result.

I'm pretty sure the speed needs to be higher in the order of at least 70Mbit/s with 2 spatial streams on 2.4GHz

What is the problem?

*Please see ap config attached.

What is the problem?

Leo Laohoo — Sun, 13 Sep 2015 08:40:41 GMT

What is the problem?

The router.

The router cannot do more than 26 Mbps of traffic. See attachment.

Hi Leo,I know about that

user889988 — Sun, 13 Sep 2015 09:02:04 GMT

Hi Leo,

I know about that document but I don't believe that's the reason in this case. Reason being is that I've had this router do 74Mbps inter-vlan routing with NAT enabled.

Ok, success.I think that I've

user889988 — Thu, 17 Sep 2015 10:45:27 GMT

Ok, success.

I think that I've figured this one out on my own and gathered some very interesting info.

I've now tested with a laptop featuring a Broadcom BCM943228HM4L 2x2 wifi chipset connecting with m15 data rate (writing to its fast SSD) and was able to achieve max 34Mbps but here's the interesting part, when I enabled Clientlink, that value shot up to a consistent 70Mbps transferring a 50MB file from FTP. On the iPad it's around 40 or 50Mbps too now.

Everywhere online it states that Clientlink 1.0 is only supported on 802.11g clients connecting to this series of AP, however I now believe it must be Clientlink that also enables MIMO for 802.11n clients (unless it is Clientlink 2.0 on this AP??). It's enabled by default in a WLC but not standalone.

Maybe someone from Cisco wants to comment on this info...