[Skimmertalk] Moving a trio of RP over to a separate LAN - how to assign static fixed IP to the Red Pitaya

[Jeff Blaine]

Thanks for the pointer Bob.

You know far more about this sort of thing than I do but I did notice in 
the notes that if DHCP requests fail, it's got a static IP fall back to 
192.168.1.100 and I think x.101.  I will have to test that out but if 
that's the case, then it looks like all I have to do is to patch the 
dhcpcd.conf lines 41 & 51 on two of the units and that will give me 
static and unique IP on the 3 boxes.  And fortunately that subnet x.1.x 
is unused in my network.

Easy enough to try...

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com

On 3/10/2023 1:07 AM, Bob Wilson, N6TV wrote:
> The method for assigning a fixed IP address to the RP is documented 
> somewhat tersely here, under "Network Configuration".
>
> http://pavel-demin.github.io/red-pitaya-notes/alpine/
>
> You'll have to get into the weeds and edit  /etc/dhcpcd.conf as 
> explained in the referenced link.
>
> But, if you're using the RP-16, it requests /two/ IP addresses with a 
> "phoney" Mac address (FF substituted for 2nd to last byte) for the 
> second 8-slice receiver, using this command in start.sh:
>
> ip link add mvl0 link eth0 address $address type macvlan mode passthru
>
> I don't know if that command works with fixed IP addresses; it 
> probably requires a real DHCP server.
>
> In sum, I don't think trying to make all that work is worth the effort.
>
> 73,
> Bob, N6TV
>
>
> On Thu, Mar 9, 2023 at 10:04 PM Jeff Blaine <KeepWalking188 at ac0c.com> 
> wrote:
>
>     My key question is how to assign a static IP to the RP Skimmer
>     receiver?
>
>     The background is this...
>
>     I have 3 RP now and in a busy contest condition, the combined network
>     utilization of the 1G link is pretty significant.  Not nearly the
>     point
>     where it swamps the network, but it's easily 30-50% of network
>     capacity
>     in these conditions.
>
>     The computer I use for the skim server host has 2 LAN cards built
>     into
>     the motherboard.  So I'm thinking that I could probably hang the 3 RP
>     and a switch off of the 2nd LAN port which would isolate all that
>     Skimmer chatter to the 2nd LAN port and keep it all from my primary
>     LAN.  As all the skimmer apps (as well as HSSDR) run on that computer
>     and no where else in the shack, I won't need to bridge the two
>     Ethernet
>     connections on the motherboard.
>
>     There is no gateway bound traffic and I don't want to hang a
>     router off
>     this mini-network just to provide DHCP so I'm thinking that I
>     probably
>     could make this work cleanly if I can figure out how to assign the 3
>     individual RP with static fixed IP.
>
>     Appreciate any advice there.  And if any other of you fine fellows
>     may
>     have been there, done that as well.
>
>     -- 
>     73/jeff/ac0c
>     alpha-charlie-zero-charlie
>     www.ac0c.com <http://www.ac0c.com>
>
>     _______________________________________________
>     Skimmertalk mailing list
>     Skimmertalk at contesting.com
>     http://lists.contesting.com/mailman/listinfo/skimmertalk
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.contesting.com/pipermail/skimmertalk/attachments/20230310/102b1a78/attachment.html>