Update Issue - RT-AX82u - Update 3.0.0.4.386 caused FIOS 900Mbps slowing to 400Mbps

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Cool_Games

New Around Here
Anyone else seeing this on Verizon FIOS ?

I am seeing a drop in upload speed since updating firmware.



I am able to pass 900 in both directions through the router between two hardwired systems using iperf3 but not to the router.

Running iPerf3 from LAN2 server (...34) to LAN4 client (...80)

Code:
$ iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.50.80, port 36962
[  5] local 192.168.50.34 port 5201 connected to 192.168.50.80 port 36964
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   112 MBytes   941 Mbits/sec                
[  5]   1.00-2.00   sec   112 MBytes   941 Mbits/sec                
[  5]   2.00-3.00   sec   112 MBytes   941 Mbits/sec                
[  5]   3.00-4.00   sec   112 MBytes   941 Mbits/sec                
[  5]   4.00-5.00   sec   112 MBytes   941 Mbits/sec                
[  5]   5.00-6.00   sec   112 MBytes   941 Mbits/sec                
[  5]   6.00-7.00   sec   112 MBytes   941 Mbits/sec                
[  5]   7.00-8.00   sec   112 MBytes   941 Mbits/sec                
[  5]   8.00-9.00   sec   112 MBytes   941 Mbits/sec                
[  5]   9.00-10.00  sec   112 MBytes   941 Mbits/sec                
[  5]  10.00-10.00  sec  67.9 KBytes   915 Mbits/sec                
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.00  sec  1.10 GBytes   941 Mbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.50.80, port 36974
[  5] local 192.168.50.34 port 5201 connected to 192.168.50.80 port 36976
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   115 MBytes   967 Mbits/sec    0   1.10 MBytes      
[  5]   1.00-2.00   sec   112 MBytes   944 Mbits/sec    0   1.10 MBytes      
[  5]   2.00-3.00   sec   112 MBytes   944 Mbits/sec   10    889 KBytes      
[  5]   3.00-4.00   sec   111 MBytes   933 Mbits/sec    0    971 KBytes      
[  5]   4.00-5.00   sec   112 MBytes   944 Mbits/sec    0   1.01 MBytes      
[  5]   5.00-6.00   sec   112 MBytes   944 Mbits/sec    0   1.01 MBytes      
[  5]   6.00-7.00   sec   112 MBytes   944 Mbits/sec    0   1.01 MBytes      
[  5]   7.00-8.00   sec   111 MBytes   933 Mbits/sec    0   1.01 MBytes      
[  5]   8.00-9.00   sec   112 MBytes   944 Mbits/sec    0   1.07 MBytes      
[  5]   9.00-10.00  sec   112 MBytes   944 Mbits/sec    0   1.07 MBytes      
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.10 GBytes   944 Mbits/sec   10             sender
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

Running iPerf3 on router server (...1) to LAN4 client (...80)


Code:
# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.50.80, port 40232
[  5] local 192.168.50.1 port 5201 connected to 192.168.50.80 port 40234
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-1.00   sec  94.1 MBytes   789 Mbits/sec                
[  5]   1.00-2.00   sec   112 MBytes   937 Mbits/sec                
[  5]   2.00-3.00   sec  56.9 MBytes   478 Mbits/sec                
[  5]   3.00-4.00   sec  92.2 MBytes   772 Mbits/sec                
[  5]   4.00-5.00   sec   111 MBytes   936 Mbits/sec                
[  5]   5.00-6.00   sec   111 MBytes   931 Mbits/sec                
[  5]   6.00-7.00   sec   111 MBytes   933 Mbits/sec                
[  5]   7.00-8.00   sec   112 MBytes   940 Mbits/sec                
[  5]   8.00-9.00   sec   112 MBytes   942 Mbits/sec                
[  5]   9.00-10.00  sec   110 MBytes   921 Mbits/sec                
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-10.00  sec  0.00 Bytes  0.00 bits/sec                  sender
[  5]   0.00-10.00  sec  1023 MBytes   858 Mbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.50.80, port 40248
[  5] local 192.168.50.1 port 5201 connected to 192.168.50.80 port 40250
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  5]   0.00-1.05   sec  45.8 MBytes   365 Mbits/sec    0    243 KBytes      
[  5]   1.05-2.05   sec  43.8 MBytes   368 Mbits/sec    0    256 KBytes      
[  5]   2.05-3.05   sec  43.2 MBytes   362 Mbits/sec    0    287 KBytes      
[  5]   3.05-4.03   sec  42.5 MBytes   364 Mbits/sec    0    287 KBytes      
[  5]   4.03-5.04   sec  42.5 MBytes   355 Mbits/sec    0    287 KBytes      
[  5]   5.04-6.06   sec  43.3 MBytes   355 Mbits/sec    0    325 KBytes      
[  5]   6.06-7.03   sec  41.2 MBytes   356 Mbits/sec    0    325 KBytes      
[  5]   7.03-8.05   sec  45.0 MBytes   369 Mbits/sec    0    325 KBytes      
[  5]   8.05-9.03   sec  42.5 MBytes   364 Mbits/sec    0    325 KBytes      
[  5]   9.03-10.02  sec  42.5 MBytes   362 Mbits/sec    0    325 KBytes      
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  5]   0.00-10.02  sec   432 MBytes   362 Mbits/sec    0             sender
[  5]   0.00-10.02  sec  0.00 Bytes  0.00 bits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------



If I use ssh and login into the router and run iperf3 on router commad line I get less than 400.
I recently also copied the arm speedtest to the jffs directory to run Ookla speedtest from command line.

Code:
$ ssh -p 1124 [email protected] /jffs/ookla-speedtest-1.0.0-arm-linux/speedtest -s 1774

   Speedtest by Ookla

     Server: Comcast - Boston, MA (id = 1774)
        ISP: Verizon Fios
    Latency:     3.69 ms   (0.02 ms jitter)
   Download:   716.36 Mbps (data used: 379.8 MB)                              
     Upload:   423.75 Mbps (data used: 518.7 MB)                              
Packet Loss: Not available.
Result URL: https://www.speedtest.net/result/c/9e05b68b-4945-4755-a6a8-83247c9e6282


Pasted from QoS Internet Speed log history verifies the FIRMWARE is culprit

2021/5/21 768.19 381.26 4.84 0.23 0.00 ComCast Boston
10:27

2021/5/21 715.69 357.98 2.72 0.21 0.00 Starry Boston

Signature Version 2.230 Updated : 2021/05/20 14:21
BEFORE AX82U FW Upgrade to 3.0.0.4.386_43129-g60defb2

2021/5/11 763.42 717.41 4.20 0.43 0.00 Server unrecorded
09:41

2021/5/11 772.33 930.10 3.34 1.07 0.00 ComCast Boston
09:40
 
Last edited:

bbunge

Part of the Furniture
Have found that speed tests from the router can be unreliable. Speed tests over WIFI may not be able to get up to connection bandwidth because of the limitations of the WIFI adaptor.
 

Cool_Games

New Around Here
These these tests are all 3 meter CAT 6 hardwire into the router directly.
iPerf3 Client ...34 is i7 Linux laptop and Server ...80 is i7 desktop shows wiring can do 900+ Mbps bidirectionally. Server ...1 is AX82u and shows 400 Mbps upload over same wires that are on the LAN ports.
 

KevTech

Very Senior Member
Merlin has said that running iperf on the router is not recommended as the CPU will bottleneck.

 

Cool_Games

New Around Here
Merlin has said that running iperf on the router is not recommended as the CPU will bottleneck.

I suspected that and was surprised to find it available so I tried it anyway.
Next idea was any settings that may have changed after update.
I don't know where to look though.
I feel it is strange to see this change in upload after update and realize 400 is just one stream and may not be restricting multiple connections.
I saw three 300 Mbps as implied functionality to expect.
ComCast is really poor upload speed by comparison.
I started in 1980's with 14400 kps shared dial up and last year was 50 Mbps before ONT update in March 2021 so 1 Gbps upload is a major leap.

Are there release notes for ASUS Firmware updates anywhere ?
 

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