UniFi AC Mesh Support - lime-dev

30 Jun 2017

Hi guys,
We are here with George from Sarantaporo testing this UniFi AC Mesh
devices.
We successfuly flashed two of them that are meshing with each other and
with other devices through 2.4ghz and 5ghz with AC.
The problem is that the throughput is not very good.
Doing a netperf, we get (on the AC link):

root@LiMe-3c5540:~# netperf -H fe80::f29f:c2ff:fe3e:5435%wlan0-mesh
netperf -cCD1 -t tcp_maerts -l30MIGRATED TCP STREAM TEST from ::0 (::)
port 0 AF_INET6 to fe80::f29f:c2ff:fe3e:5435%wlan0-mesh () port 0
AF_INET6 : demoRecv   Send    Send                          Socket
Socket  Message  Elapsed              Size   Size    Size     Time     
Throughput  bytes  bytes   bytes    secs.    10^6bits/sec  
 87380  16384  16384    10.06      55.41   
and on the 802.11g link:

root@LiMe-3c5540:~# netperf -H fe80::f29f:c2ff:fe3d:5435%wlan1-mesh
netperf -cCD1 -t tcp_maerts -l30
MIGRATED TCP STREAM TEST from ::0 (::) port 0 AF_INET6 to
fe80::f29f:c2ff:fe3d:5435%wlan1-mesh () port 0 AF_INET6 : demo
Recv   Send    Send                          
Socket Socket  Message  Elapsed              
Size   Size    Size     Time     Throughput  
bytes  bytes   bytes    secs.    10^6bits/sec  

 87380  16384  16384    11.88       1.19  

So... pretty crappy, isn't it? (the devices are 30cm away from each
other, and no wireless traffic is around but those.

Also, another thing called my atention.

These are the luci wireless outputs for both of the devices.
Isn't it strange that both of them have high reception speed and super
slow transmission speed with each other?

We have already tried changing the channels.
Also tried to avoid 11s/adhoc and connect as client/master.
The outcome is the same:

root@LiMe-3c5540:~# netperf -H fe80::f29f:c2ff:fe3c:5435%wlan0-1
netperf -cCD1 -t tcp_maerts -l30MIGRATED TCP STREAM TEST from ::0 (::)
port 0 AF_INET6 to fe80::f29f:c2ff:fe3c:5435%wlan0-1 () port 0 AF_INET6
: demoRecv   Send    Send                          Socket
Socket  Message  Elapsed              Size   Size    Size     Time     
Throughput  bytes  bytes   bytes    secs.    10^6bits/sec  
 87380  16384  16384    10.01      62.59   
I haven't tried all this configs yet: https://wiki.openwrt.org/doc/uci/
wireless#ac_capabilities
But maybe there is some knowlege in the group that can help on this.

What do you think about this?

Regards,