MT7621 - 21.02/Master feedback firmware image test - IPV6 offload and disabled Flow Control

With VLAN patches the upload speed stucked at 100Mb instead of 1Gb.

[65961.473728] mt7530 mdio-bus:1f lan1: Link is Up - 100Mbps/Full - flow control off
[65961.481419] br-lan: port 1(lan1) entered blocking state
[65961.486670] br-lan: port 1(lan1) entered listening state
[65965.775047] mt7530 mdio-bus:1f lan1: Link is Down
[65965.780251] br-lan: port 1(lan1) entered disabled state
[65967.848922] mt7530 mdio-bus:1f lan1: Link is Up - 100Mbps/Full - flow control off
[65967.856614] br-lan: port 1(lan1) entered blocking state
[65967.861839] br-lan: port 1(lan1) entered listening state
[65976.054938] br-lan: port 1(lan1) entered learning state
[65984.374771] br-lan: port 1(lan1) entered forwarding state
[65984.380182] br-lan: topology change detected, propagating
[65986.515766] mt7530 mdio-bus:1f lan1: Link is Down
[65986.520609] br-lan: port 1(lan1) entered disabled state
[65999.413392] mt7530 mdio-bus:1f lan1: Link is Up - 1Gbps/Full - flow control rx/tx
[65999.420971] br-lan: port 1(lan1) entered blocking state
[65999.426209] br-lan: port 1(lan1) entered listening state
[66008.054265] br-lan: port 1(lan1) entered learning state
[66016.374086] br-lan: port 1(lan1) entered forwarding state
[66016.379539] br-lan: topology change detected, propagating
iperf3 -c 192.168.1.1 -n 200m
PC->MI-R3P
Connecting to host 192.168.1.1, port 5201
[  5] local 192.168.1.30 port 45512 connected to 192.168.1.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  12.4 MBytes   104 Mbits/sec    0    106 KBytes       
[  5]   1.00-2.00   sec  11.2 MBytes  93.8 Mbits/sec    0    153 KBytes       
[  5]   2.00-3.00   sec  11.2 MBytes  93.8 Mbits/sec    0    116 KBytes       
[  5]   3.00-4.00   sec  11.2 MBytes  93.8 Mbits/sec    0   96.2 KBytes       
[  5]   4.00-5.00   sec  11.2 MBytes  93.8 Mbits/sec    0    209 KBytes       
[  5]   5.00-6.00   sec  11.2 MBytes  93.8 Mbits/sec    0   99.0 KBytes       
[  5]   6.00-7.00   sec  11.2 MBytes  93.8 Mbits/sec    0    119 KBytes       
[  5]   7.00-8.00   sec  11.2 MBytes  94.3 Mbits/sec    0    140 KBytes       
[  5]   8.00-9.00   sec  11.2 MBytes  93.8 Mbits/sec    0    127 KBytes       
[  5]   9.00-10.00  sec  11.2 MBytes  93.8 Mbits/sec    0    130 KBytes       
[  5]  10.00-11.00  sec  10.8 MBytes  90.2 Mbits/sec    0    107 KBytes       
[  5]  11.00-12.00  sec  11.7 MBytes  97.9 Mbits/sec    0    120 KBytes       
[  5]  12.00-13.00  sec  11.2 MBytes  93.8 Mbits/sec    0    119 KBytes       
[  5]  13.00-14.00  sec  11.2 MBytes  93.8 Mbits/sec    0    105 KBytes       
[  5]  14.00-15.00  sec  10.7 MBytes  89.7 Mbits/sec    0    105 KBytes       
[  5]  15.00-16.00  sec  11.7 MBytes  97.9 Mbits/sec    0    127 KBytes       
[  5]  16.00-17.00  sec  10.8 MBytes  90.2 Mbits/sec    0    150 KBytes       
[  5]  17.00-17.78  sec  9.05 MBytes  96.7 Mbits/sec    0   90.5 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-17.78  sec   200 MBytes  94.3 Mbits/sec    0             sender
[  5]   0.00-17.79  sec   199 MBytes  93.8 Mbits/sec                  receiver
MI-R3P->PC
root@MI-R3P:~# iperf3 -c 192.168.1.30 -n 200m
Connecting to host 192.168.1.30, port 5201
[  5] local 192.168.1.1 port 1812 connected to 192.168.1.30 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  56.2 MBytes   472 Mbits/sec    0    368 KBytes       
[  5]   1.00-2.00   sec  49.5 MBytes   415 Mbits/sec    0    303 KBytes       
[  5]   2.00-3.00   sec  48.8 MBytes   408 Mbits/sec    0    379 KBytes       
[  5]   3.00-3.88   sec  45.4 MBytes   433 Mbits/sec    0    337 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-3.88   sec   200 MBytes   432 Mbits/sec    0             sender
[  5]   0.00-3.89   sec   199 MBytes   429 Mbits/sec                  receiver