[hpsdr] Problems with direct connection PC-OpenHPSDR

[Kjell Karlsen]

Hi Scott.

Normally I am using a switch connected to router but in this particular  
setup I do not want to use the router and switch. The PC will be connected  
to Internet via wifi.

Also for portable use I do not want to carry more bits and pieces than  
needed so I prefer direct connection. And it has never been any problems  
using fixed IP address in the range 10.0.0.xx.

73, Kjell



På Thu, 30 May 2019 20:39:15 +0200, skrev Scott Traurig  
<scott.traurig at gmail.com>:

> George:
>
> Any modern NIC will invoke Auto-MDI/MDIX protocols which have virtually  
> eliminated the need for crossover cables. Also, there will be no  
> >performance improvement from using a switch.
>
> Kjell:
>
> You obviously have a router attached to that switch providing DHCP  
> services. You should have mentioned that. That is how the SDR card is  
> getting >10.0.0.61 automatically when attached to the switch. Your PC  
> will also get an address automatically that way.
>
> Also, it would appear that you had the PC wired port set up for  
> DHCP/APIPA and a fixed address in the SDR card. That will not work when  
> using >APIPA. The PC wired port will eventually settle on 169.254.x.x  
> and that is not going to work to talk to an SDR card with an address of  
> 10.0.x.x.
>
> The EASIEST and generally SAFEST way to connect these things is to  
> always use a switch and router and let the router hand out addresses to  
> >everything automatically via DHCP. This will not work for more complex  
> situations (folks who want remote access, etc.), but people who want to  
> >create more complex network solutions generally understand what they  
> are doing by definition.
>
> 73,
>
> Scott
>
> On Thu, May 30, 2019 at 1:46 PM Kjell Karlsen <la2ni at online.no> wrote:
>> Hi Scott and Georg.
>>
>> First: This happened with both Protocols.
>>
>> Usually I have had the IP address set  fixed to 10.0.0.xx on the SDR  
>> cards and that has normally been no problem.
>>
>> I changed the IP address on the SDR card to 0.0.0.0 and now I am able  
>> to connect directly. The IP address on the SDR card is now  
>> 169.254.170.149.
>>
>> If I connect via the switch, the SDR card get 10.0.0.61.
>>
>> So now I am happy!!
>>
>> Thank you both for the help.
>>
>> 73, Kjell
>>
>>



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