Зависает UDP

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Следующея проблема: При работе udp, происходит зависание. С чем это связанно: клиент:

root@router:~# iperf3 -c 10.243.2.6 -u
Connecting to host 10.243.2.6, port 5201
[  4] local 192.168.2.1 port 38623 connected to 10.243.2.6 port 5201
[ ID] Interval           Transfer     Bandwidth       Total Datagrams
[  4]   0.00-1.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   1.00-2.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   2.00-3.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   3.00-4.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   4.00-5.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   5.00-6.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   6.00-7.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   7.00-8.00   sec   128 KBytes  1.05 Mbits/sec  16  
[  4]   8.00-9.00   sec   128 KBytes  1.05 Mbits/sec  16