60km link with nstreme enable cause lower bandwidth

mipland · Tue Oct 31, 2006 2:36 pm

Hy all,
I have a problem with nstreme.

Position:
Site A: RB112, SR5, sectorial antenna 16dBi, 1549m asl
Site B: RB112, SR5, panel antenna 24dBi, 60m asl ca.
Freq. 5825, 5GHz band (no turbo) and no nstreme: 10Mbps udp/receive.
Freq. 5825, 5GHz band (no turbo) and nstreme: 7Mbps udp/receive.

Why? Is it normal?

73 de IZ3HAD

janisk · Tue Oct 31, 2006 2:53 pm

try to tur off connection tracking you may get better results, but suggest you to have mroe powerfull PCU there to do Nstream

mipland · Tue Oct 31, 2006 2:59 pm

Ok, thanks for the answer.
So, wich is the minimum hardware (CPU/RAM) to make a powerful link with nstreme enable?
May be a RB532 the solution?

Thanks

73 de IZ3HAD

Hydro · Tue Oct 31, 2006 3:15 pm

I've got a similar set-up using 532's and SR5's doing PTP. The cpu is constantly at 30% but bandwidth is decent.
I've got another set-up thats a 2ghz machine running 3 SR9's and 3 CM9's all with Nstreame. That one rarely goes over 2% cpu useage.

If I remember correctly the suggested is 850 or above.

Hydro

mipland · Tue Oct 31, 2006 3:18 pm

I've got a similar set-up using 532's and SR5's doing PTP. The cpu is constantly at 30% but bandwidth is decent.

Ok, and...which is your bandwidth?

datawlan · Tue Oct 31, 2006 10:02 pm

Test setup, with result:

2xRB532 (each with 2*CM9 card; 5200 and 5280Mhz)
(signal strength=68, 36Mbit connect speed; STN=28, TX=Card/23dbi)
4xGrante 60cm

app. 21km distance, clear visible conditions,

14-14,5Mbit average bandwith (65-78% of CPU usage)

Yes, active link for 1,5 weeks now.

mipland · Tue Oct 31, 2006 11:34 pm

Perfect. I retried this evening. I tried the same 60km link with 5Ghz band (without turbo), nstreme enable, conn-track disable, 2xRB112, 2xSR5, 1x sect.antenna 16dBi, 1x grid antenna 24dBi: 13-14Mbps (UDP receive)!
Thanks

73 de IZ3HAD

datawlan · Tue Oct 31, 2006 11:59 pm

with TCP, what is the difference?

jo2jo · Wed Nov 01, 2006 8:19 am

yea hydro you left out the key part, the Bandwidth numbers.

thanks

mipland · Thu Nov 02, 2006 2:09 pm

with TCP, what is the difference?

With 13-14Mbps UDP-->9,5-10Mbps TCP.