V2EX-intel x520 网卡收发速度不一致，帮分析分析

lifavor:

基本信息：

状态 1

PC: TL-NT521 aqc107 电口 RJ45 超六线

NAS: TL-NT521F aqc107 光口，dac 铜缆

交换机：QSW-M2108R-2C 威联通

主板插槽：pcie 3.0*4 (x16 插槽，b660m 迫击炮第三槽)

PC 与 NAS 使用 iperf3 测速一切正常

状态 2 只换 NAS 网卡

NAS: intel x520 光口，dac 铜缆，读 10G, 写 3G 左右

NAS: intel x520 光口，双 LC intel 兼容光模块，读 10G, 写 3G 左右

PS:之前咸鱼买了张 x520 以为有问题，退了，现在又从淘宝买了个拆机卡，还是这样

怀疑点：交换机有问题，光模块有问题，unraid 系统与 x520 兼容性，各位老铁分析分析

E:\iperf-3.1.3-win64>iperf3.exe -c 192.168.50.113 -R
Connecting to host 192.168.50.113, port 5201
Reverse mode, remote host 192.168.50.113 is sending
[  4] local 192.168.50.242 port 9307 connected to 192.168.50.113 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  1.02 GBytes  8.76 Gbits/sec
[  4]   1.00-2.00   sec  1.02 GBytes  8.80 Gbits/sec
[  4]   2.00-3.00   sec  1.02 GBytes  8.77 Gbits/sec
[  4]   3.00-4.00   sec  1.03 GBytes  8.89 Gbits/sec
[  4]   4.00-5.00   sec  1.01 GBytes  8.71 Gbits/sec
[  4]   5.00-6.00   sec  1.01 GBytes  8.66 Gbits/sec
[  4]   6.00-7.00   sec  1.02 GBytes  8.79 Gbits/sec
[  4]   7.00-8.00   sec  1.04 GBytes  8.89 Gbits/sec
[  4]   8.00-9.00   sec  1.01 GBytes  8.68 Gbits/sec
[  4]   9.00-10.00  sec  1.02 GBytes  8.74 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  10.2 GBytes  8.77 Gbits/sec    3             sender
[  4]   0.00-10.00  sec  10.2 GBytes  8.77 Gbits/sec                  receiver

iperf Done.

E:\iperf-3.1.3-win64>iperf3.exe -c 192.168.50.113
Connecting to host 192.168.50.113, port 5201
[  4] local 192.168.50.242 port 9311 connected to 192.168.50.113 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec   384 MBytes  3.22 Gbits/sec
[  4]   1.00-2.01   sec   340 MBytes  2.81 Gbits/sec
[  4]   2.01-3.00   sec   346 MBytes  2.94 Gbits/sec
[  4]   3.00-4.00   sec   322 MBytes  2.70 Gbits/sec
[  4]   4.00-5.00   sec   378 MBytes  3.17 Gbits/sec
[  4]   5.00-6.00   sec   302 MBytes  2.53 Gbits/sec
[  4]   6.00-7.00   sec   441 MBytes  3.70 Gbits/sec
[  4]   7.00-8.00   sec   493 MBytes  4.14 Gbits/sec
[  4]   8.00-9.00   sec   352 MBytes  2.95 Gbits/sec
[  4]   9.00-10.00  sec   348 MBytes  2.92 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec  3.62 GBytes  3.11 Gbits/sec                  sender
[  4]   0.00-10.00  sec  3.62 GBytes  3.11 Gbits/sec                  receiver

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