在 wireguard 隧道上建立 vxlan 隧道， iperf3 测试没速度，这是啥情况？ TCP over UDP over UDP

[FreeEx]

v 站贴图不方便，复制粘贴测试结果了。

server

Accepted connection from 10.0.0.2, port 33854
[  5] local 10.0.0.1 port 5201 connected to 10.0.0.2 port 33856
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   1.00-2.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   2.00-3.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   3.00-4.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   4.00-5.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   5.00-6.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   6.00-7.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   7.00-8.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   8.00-9.00   sec  0.00 Bytes  0.00 bits/sec                  
[  5]   9.00-10.00  sec  0.00 Bytes  0.00 bits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.00  sec  0.00 Bytes  0.00 bits/sec                  receiver

client

root@dubuntu:/etc/wireguard# ip netns exec ns0 iperf3 -c 10.0.0.1
Connecting to host 10.0.0.1, port 5201
[  5] local 10.0.0.2 port 33856 connected to 10.0.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   107 KBytes   879 Kbits/sec    2   1.41 KBytes       
[  5]   1.00-2.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes       
[  5]   2.00-3.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       
[  5]   3.00-4.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes       
[  5]   4.00-5.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       
[  5]   5.00-6.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       
[  5]   6.00-7.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes       
[  5]   7.00-8.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       
[  5]   8.00-9.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       
[  5]   9.00-10.00  sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec   107 KBytes  88.0 Kbits/sec    5             sender
[  5]   0.00-10.00  sec  0.00 Bytes  0.00 bits/sec                  receiver

iperf Done.