I have two laptops on the same network in my house. I was trying to share files from one to the other via a web server I developed myself(static file sharing). I found it slow and tested the connection speed with iperf3. Result is:
$ iperf3 -c 192.168.1.103 -p 4445
Connecting to host 192.168.1.103, port 4445
[ 5] local 192.168.1.106 port 39464 connected to 192.168.1.103 port 4445
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.94 MBytes 16.3 Mbits/sec 12 39.6 KBytes
[ 5] 1.00-2.00 sec 1.55 MBytes 13.0 Mbits/sec 1 48.1 KBytes
[ 5] 2.00-3.00 sec 1.55 MBytes 13.0 Mbits/sec 1 55.1 KBytes
[ 5] 3.00-4.00 sec 954 KBytes 7.82 Mbits/sec 1 39.6 KBytes
[ 5] 4.00-5.00 sec 1.24 MBytes 10.4 Mbits/sec 0 46.7 KBytes
[ 5] 5.00-6.00 sec 1.55 MBytes 13.0 Mbits/sec 0 48.1 KBytes
[ 5] 6.00-7.00 sec 1.24 MBytes 10.4 Mbits/sec 0 39.6 KBytes
[ 5] 7.00-8.00 sec 1.24 MBytes 10.4 Mbits/sec 0 42.4 KBytes
[ 5] 8.00-9.00 sec 636 KBytes 5.21 Mbits/sec 0 39.6 KBytes
[ 5] 9.00-10.00 sec 636 KBytes 5.21 Mbits/sec 0 35.4 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 12.5 MBytes 10.5 Mbits/sec 15 sender
[ 5] 0.00-10.03 sec 11.8 MBytes 9.87 Mbits/sec receiver
iperf Done.
As seen, the speed is ~10 Mbps. I can download files at 30 Mbps even from internet, and in my modem's manual it says
Signal Rate: 867Mbps at 5GHz, 300Mbps at 2.4GHz
so I expect much faster speeds.
My modem(ADSL) is Tp-Link AC1200 VC220-G3u. I couldn't find any custom setting that limits speed. What can be the problem and how can I fix it?
I run iperf3 test against a public iperf server only on one laptop. For regular client tests, it was around ~7.5Mbps. But my internet package already has 8Mpbs upload limit. For reverse tests (-R) it was ~11Mbps and ~15Mbps.
TBH public servers don't seem that healthy, since most of them gives "Bad File Descriptor" error. Also my problem is about Local Network where the only limiting criteria should be modem's transfer capability. On internet, you are bound to server limits and your ISP package.
