[hpsdr] LAN - WLAN

[John Marvin]

  Bernd,

Here are some answers that I believe are correct:

1) Since Discovery is done as a local broadcast you can't do discovery 
from a different subnet.
2) Even if you were to use a static IP address my understanding is that 
you still can't get to a Hermes or Metis on a different subnet. This is 
due to the fact that they do not support any form of routing so they 
will just send out a ARP request on the local subnet and not get a 
response.  It's possible that you might be able to get around this if 
your router supports static arp table entries. This would allow the 
router to respond for the remote host, but that is a hardwired 
configuratione, i.e. the remote host(s) would have to have static IP's, 
and you'd have to put a static arp table entry in for every host that 
wanted to access Hermes. Kind of ugly, but it might work.
3) You can run multiple Hermes/Metis on the same lan, but not all 
software supports selection of a particular radio. However, they do all 
ignore a busy radio. As far as I can tell PowerSDR does not allow any 
form of selection. Both KISS console and CuSDR do allow selection. So if 
you want to run multiple versions of PowerSDR you would be able to (i.e. 
the first PowerSDR would find one of the radios and then the second 
would ignore the busy radio and choose the other radio), but you might 
not be able to guarantee which one got assigned to which radio if that 
mattered.

For true remote access you probably want a server on the local subnet 
anyway which can compress the audio going out over the internet.

John
AC0ZG

On 12/19/2012 2:52 AM, Bernd Gasser wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Gerhard,
> I'm running a similar setup on WLAN but noticed that the bandwidth may be
> too low especially for the higher traffic when running RX2 and I'm sometimes
> getting distortions on Audio.
>
> Regarding your setup '2 Gigabyte switches - Ubiquiti 5 GHz link / 180
> Mbs/~900 ft - 2 Gigabyte switches' - I'm assuming you are running the
> Ubiquiti in bridge-mode (L2) or do you have them setup as routers with
> different IP-subnets?
>
> If on IP-subnets, I'd have a few questions (maybe also to the greater
> audience):
> When having Hermes and the PC on different IP-subnets, how does discovery of
> Hermes work? - Fixed IP on Hermes? - But how to convince PowerSDR to
> identify and select a specific Hermes board on a 'remote' IP-subnet? - As I
> have seen PSDR is just doing a broadcast on local subnet to find Hermes or
> Metis. Not sure what happens here with multiple Hermes/Metis on same
> IP-subnet?
>
> Assuming there is a way to identify a specific Hermes/Metis board on local
> or remote IP-subnets, would it be supported to run multiple different boards
> on same LAN? In this case - how to assign a specific board to one of
> multiple instances of PSDR?
>
> Background for the questions - I'm running three HPSDR TRX now (Ozy(USB) /
> Metis&Hermes(LAN)) and I'd be looking for a way to run Hermes and Metis in
> parallel on the same NW or have it accessible from remote (i.e. HAMNET).
>
> 73,
> Bernd/OE1ACM
>
>
>
> -----Original Message-----
> From: hpsdr-bounces at lists.openhpsdr.org
> [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Gerhard Burian
> Sent: Mittwoch, 19. Dezember 2012 08:41
> To: hpsdr at openhpsdr.org
> Subject: [hpsdr] LAN - WLAN
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hello,
>
> Just want to report about successfully setting up the Hermes/Anan10 box and
> running PowerSDR RX2 over a LAN and WLAN link:
>
> Hermes - 2 Gigabyte switches - Ubiquiti 5 GHz link / 180 Mbs/~900 ft - 2
> Gigabyte switches - PC
>
> Ping response is 1 - 4 ms.
>
> I can now operate from my office desk all day long J!
>
> I want to thank everyone for making this possible.
>
>
>
> Gerhard OE3GBB
>
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