If memory serves me right, Marcel wrote: > Hey Bruce, > > thanks for the fast reply. > > Actually I'm using a Python script and therefor I get the IP of the > interface using netifaces. > > I also checked that using ifconfig while running the script and netstat > -an showed the same IP. > > Here was the output (using the IPs from before) while running the iperf3 > command: > > tcp 0 1 12.34.56.78:12345 12.12.12.12:1111 SYN_SENT > > I can't see what might be wrong here, do you have an idea where else I > could look for an issue?
Hmmm...that looks pretty much normal to me...this is indeed more than a little odd. It's weird that if you use "-B" to specify the outgoing address, it stops working even if you specify the same address the routing table would have picked anyway. At the moment I can't think of anything to try next...I know that's not much help. Bruce. > Am 13.04.2018 um 20:25 schrieb Bruce A. Mah: >> If memory serves me right, Marcel wrote: >> >>> I'm trying to do an iperf3 test using a Huawei ME909 wwan modem on a >>> raspberry pi zero w. >>> >>> I use the command as iperf3 -c 12.12.12.12 -t 3 -p 5201 -B 12.34.56.78 >>> >>> where 12.12.12.12 is the ip of the server machine and 12.34.56.78 is the >>> ip of the Huawei modem. >>> >>> With this command, I get a timeout error, but when I ommit the -B part >>> with the ip of the modem, iperf3 uses the wlan0 interface and behaves >>> normally. >>> >>> I should also mention that I connected the modem with AT commands >>> (AT+COPS, AT^NDISDUP) and when I do a ping over that interface it also >>> behaves as expected, but when I use a package size over 1300 for ping, I >>> also get a timeout error. >>> >>> I'm quite new to this kind of stuff, so I would appreciate any help! >> Hi Marcel-- >> >> Hmmm...I don't completely understand the networking setup, but the >> argument to -B is supposed to be the address of the network interface on >> the iperf3 client machine that you want to bind to. So you're saying >> the Huawei modem presents an IP network interface with the address >> 12.34.56.78 (I presume that's not the real address, which is fine). >> >> Any chance you can do "ip addr" (or the equivalent) for this interface? >> I'd like to check if the address assigned is really the same as what >> you're giving in the "-B" parameter to iperf3. Also you can see the MTU >> for the link (might help with the ping issue you mentioned). >> >> While the test is running you might be able to (from another window) use >> "netstat -an" as additional verification of the local address being used. >> >> Bruce. >> >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> >> >> _______________________________________________ >> Iperf-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/iperf-users > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > > > _______________________________________________ > Iperf-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/iperf-users >
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