Multiple Red Pitayas on a Single Device Using Ethernet Cables

[zzyzzy42]

Description of the setup:

• Device: STEM122-16 and Raspberry Pi 4B
• SD card image: red-pitaya-alpine-3.14-armv7-20220322
• Application: GNU Radio
• Other relevant information:

Description of the problem:

Hi Pavel,

I hope your week is going well! Sorry to bother you again.

I am wondering if there is a way to connect multiple Red Pitayas to a single device using ethernet cables.

I connected 2 Red Pitayas to my Raspberry Pi using 2 Ethernet cables and tried to access them using their mDNS IP address, the RP-F0XXX.LOCAL/ thing. It seems like I could only connect to one of them.

I must be missing something. Maybe there is a way to set the IP address of different Red Pitayas in their configuration files? Thanks a lot for your help!

Steps to reproduce the problem:

1. Connect 2 Red Pitayas to a Raspberry Pi 4B using 2 Ethernet cables.
2. Set the IP address of the two Ethernet ports on the Raspberry Pi 4B to 192.168.1.111 and 192.168.1.112.
3. Power on the Red Pitayas.
4. Open a browser and enter RP-F0899D.LOCAL/. Red Pitaya 1 can now work with GNU Radio.
5. Open a new browser tab and enter RP-F08940.LOCAL/. It still connects to Red Pitaya 1, even though the IP address is from the other Red Pitaya (Red Pitaya 2).
6. The same phenomenon is observed in GNU Radio.

[pavel-demin]

The easiest solution is to use a small router with several gigabit ports and connect all devices to this router.

Here are some examples of such routers: https://www.tp-link.com/us/business-networking/omada-sdn-router/er605 https://www.zyxel.com/global/en/products/wifi-router/ac750-dual-band-wireless-gigabit-router-nbg6515

If you really insist on your current network setup, then check out the Network configuration notes. The commands to edit /etc/dhcpcd.conf are

nano /etc/dhcpcd.conf
lbu commit -d

[zzyzzy42]

Will try, thank you very much!