opensand team mailing list archive

[Julien BERNARD <jbernard@xxxxxxxxxxxxxxxxxxx>]

Hi Jussi,


> We have tested ping from ST1 to GW with
> *iperf -c 192.168.18.42 -u -b 10m*
> *iperf -c ***192.168.18.42* -u -b 60m
> **iperf -c ***192.168.18.42* -u -b 100m *

If you are using the default IP configuration you should use 
192.168.42.1 as destination address because with your command, you does 
not send your traffic through OpenSAND.
With iperf it is recommended to use 192.168.42.3 that is the tun 
interface address to be sure that the server report will be correctly 
received.

Moreover, there is a lot of configuration parameters to change to expect 
reaching high rates and return link is limited to approximately 70Mb/s: 
65Mb/s CRA + 8Mb/s RBDC.
The configuration parameters to be changed are:
 Global>global>up_return_band: increase bandwidth and symbol_rate in 
carriers_distribution
 ST1 >dvb_rcs_tal: increase rt_fixed_bandwidth (CRA), fifos size_max 
(for BE if you don't use QoS) and max_rbdc


> It seems even  100 bandwidth go trough without loss almost rate of 
> 90Mbits/s. I´d like make sure that encapsulation really work? I 
> undestood that installation from packets includes these plugins.
For the encapsulation, by default you have AAL5/ATM on return link and 
ULE/MPEG2-TS on forward link.
You can install the packets for GSE encapsulation that will be available 
on forward link.


Regards,


--
Julien BERNARD
Viveris Technologies
+33 (0)5 61 00 31 84