Slow network or bad config ? Help needed!

hfandrei

Hi there!

It's just me having slow network performance ? Take a look at this iperf3 test

My product: RS 2000 G9.5

OS: CloudLinux 8.6

Code

iperf3 -c fra.speedtest.clouvider.net -p 5202 -4
Connecting to host fra.speedtest.clouvider.net, port 5202
[  5] local my-ip port 35814 connected to 91.199.118.184 port 5202
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  26.7 MBytes   224 Mbits/sec  296   1.07 MBytes
[  5]   1.00-2.00   sec  11.2 MBytes  94.4 Mbits/sec    0   1.08 MBytes
[  5]   2.00-3.00   sec  10.0 MBytes  83.9 Mbits/sec    0   1.09 MBytes
[  5]   3.00-4.08   sec  11.2 MBytes  87.2 Mbits/sec    0   1.10 MBytes
[  5]   4.08-5.00   sec  15.0 MBytes   137 Mbits/sec    0   1.11 MBytes
[  5]   5.00-6.00   sec  18.8 MBytes   157 Mbits/sec    0   1.13 MBytes
[  5]   6.00-7.00   sec  16.2 MBytes   136 Mbits/sec    0   1.14 MBytes
[  5]   7.00-8.00   sec  17.5 MBytes   147 Mbits/sec    0   1.16 MBytes
[  5]   8.00-9.00   sec  15.0 MBytes   126 Mbits/sec    0   1.17 MBytes
[  5]   9.00-10.00  sec  12.5 MBytes   105 Mbits/sec    0   1.18 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   154 MBytes   129 Mbits/sec  296             sender
[  5]   0.00-10.00  sec   152 MBytes   127 Mbits/sec                  receiver

Alles anzeigen

Can I get some help/advice ?

PS: Booted in rescue mode, I get around 7-800 Mb/s (so in rescue is good)

I think is something wrong with my config... I'm using virtio as network.

Thanks in advance !

frank_m

I am using also virtio.

Code

iperf3 -c fra.speedtest.clouvider.net -p 5202 -4
Connecting to host fra.speedtest.clouvider.net, port 5202
[  5] local 46.38.255.110 port 57070 connected to 91.199.118.184 port 5202
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   290 MBytes  2.43 Gbits/sec  2719    938 KBytes
[  5]   1.00-2.00   sec   198 MBytes  1.66 Gbits/sec    1    809 KBytes
[  5]   2.00-3.00   sec   215 MBytes  1.80 Gbits/sec    0    994 KBytes
[  5]   3.00-4.00   sec   259 MBytes  2.17 Gbits/sec    0   1.15 MBytes
[  5]   4.00-5.00   sec   266 MBytes  2.23 Gbits/sec   45    971 KBytes
[  5]   5.00-6.00   sec   252 MBytes  2.12 Gbits/sec    0   1.13 MBytes
[  5]   6.00-7.00   sec   272 MBytes  2.29 Gbits/sec   45    946 KBytes
[  5]   7.00-8.00   sec   245 MBytes  2.06 Gbits/sec    0   1.10 MBytes
[  5]   8.00-9.00   sec   279 MBytes  2.34 Gbits/sec   45    912 KBytes
[  5]   9.00-10.00  sec   236 MBytes  1.98 Gbits/sec    0   1.07 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  2.45 GBytes  2.11 Gbits/sec  2855             sender
[  5]   0.00-10.00  sec  2.44 GBytes  2.09 Gbits/sec                  receiver

iperf Done.

Alles anzeigen

It is an RS 2000 G9.5 SE, so results are compareable.

Are you using firewalls? Traffic Shaping? Is the host very occupied?

hfandrei

I'm using csf but with csf disables I have the same results. No other firewall.

Host is not busy at all.

Can't figure what is wrong with my server... damn..

hfandrei

SOLVED. Flushed all nftables and now all is back to normal.