Ah, I just realized if I had checked that earlier, this would have
solved my issue!
As you can see in the other answer, I just didn't realize that there is
a default network.
Thanks for the help! :)
Am 16.04.2018 um 23:29 schrieb Bob McMahon:
I'd look at three things on both ends
* iptables -L (or firewall settings)
* routing tables (ip route show all)
* arp tables (arp -n) and the mac addresses (ifconfig)
to verify the end/end path. Also, if there are switches in the middle
dumping the switch address tables may be required
Bob
On Mon, Apr 16, 2018 at 2:20 PM, Bruce A. Mah <b...@es.net
<mailto:b...@es.net>> wrote:
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 <http://12.34.56.78:12345>
12.12.12.12:1111 <http://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.
>>
>>
>>
>>
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