Network Characterization

Hi,

I have two nodes running qMp in Community mode:

WDR4900
fd66:66:66:b:c24a:ff:fefc:307c
10.1.26.65/28

WDR4300
fd66:66:66:b:204:9fff:feef:101
10.1.26.25/28

I run iperf3 in server mode (ipef3 -s) in one of them (say WDR4300). From the other one I do several measurements of two seconds:

TCP bandwidth in IPv4: OK
root@qMp-TL-WDR4900-0101:~# iperf3 c 10.1.26.25 -t 2
Connecting to host 10.1.26.25, port 5201
[ 4] local 10.1.26.65 port 51184 connected to 10.1.26.25 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 10.9 MBytes 90.9 Mbits/sec 0 234 KBytes
[ 4] 1.00-2.02 sec 14.7 MBytes 122 Mbits/sec 0 294 KBytes
- - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-2.02 sec 25.6 MBytes 107 Mbits/sec 0 sender
[ 4] 0.00-2.02 sec 25.0 MBytes 104 Mbits/sec receiver

iperf Done.

TCP bandwidth in IPv6: OK
root@qMp-TL-WDR4900-0101:~# iperf3 c fd66:66:66:b:c24a:ff:fefc:307c -t 2
Connecting to host fd66:66:66:b:c24a:ff:fefc:307c, port 5201
[ 4] local fd66:66:66:13:a2f3:c1ff:fefa:c02d port 55854 connected to fd66:66:66:b:c24a:ff:fefc:307c port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 10.9 MBytes 91.3 Mbits/sec 0 181 KBytes
[ 4] 1.00-2.00 sec 13.8 MBytes 116 Mbits/sec 0 255 KBytes
- - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-2.00 sec 24.7 MBytes 104 Mbits/sec 0 sender
[ 4] 0.00-2.00 sec 24.2 MBytes 102 Mbits/sec receiver

iperf Done.

UDP bandwidth in IPv4 (target: 1 Mbps): OK
root@qMp-TL-WDR4900-0101:~# iperf3 c 10.1.26.25 -t 2 -u
Connecting to host 10.1.26.25, port 5201
[ 4] local 10.1.26.65 port 40446 connected to 10.1.26.25 port 5201
[ ID] Interval Transfer Bandwidth Total Datagrams
[ 4] 0.00-1.00 sec 120 KBytes 983 Kbits/sec 15
[ 4] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec 16
- - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-2.00 sec 248 KBytes 1.02 Mbits/sec 28129.900 ms 0/31 (0%)
[ 4] Sent 31 datagrams

iperf Done.

UDP bandwidth in IPv6 (target: 1 Mbps): FAIL
On WDR4900 (client):
root@qMp-TL-WDR4900-0101:~# iperf3 -c fd66:66:66:b:c24a:ff:fefc:307c -t 2 -u
Connecting to host fd66:66:66:b:c24a:ff:fefc:307c, port 5201
iperf3: error - unable to read from stream socket: Resource temporarily unavailable

On WDR4300 (server):
root@qMp-TL-WDR4300-307c:~# iperf3 s
----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from fd66:66:66:13:a2f3:c1ff:fefa:c02d, port 55856
[ 5] local fd66:66:66:11:c24a:ff:fefc:307e port 5201 connected to fd66:66:66:13:a2f3:c1ff:fefa:c02d port 50650
iperf3: error - unable to read from stream socket: Connection refused

-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------