Cluster setup working over wlan0 but not eth0

[kwlii]

I followed the instructions for setting up a cluster at the following site.

https://raspberrytips.com/raspberry-pi-cluster/

I can get my command to work when using nodesips that are set for my pi's nodes that are on my wifi network, but I cannot get it to work when i use the ip addresses for the ethernet switch i have them all connected to.

Here my command works because my nodesips file has the wifi ip addresses.

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$/opt/mpi/bin/mpiexec -f nodesips -n 3 python test.py
Hello from lzonepi4b1
Hello from lzonepi3bp1
Hello from lzonepi4b2

But I get the following results from the eithernet switch ip addresses which i set in the managed switch i am using 192.168.0.* versus the wifi router addresses which is 192.168.1.*

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$/opt/mpi/bin/mpiexec -f nodesips -n 3 python test.py
Hello from lzonepi4b1
ssh_askpass: exec(/usr/bin/ssh-askpass): No such file or directory
Host key verification failed.
Hello from lzonepi4b2

Seems like my 3rd node which is a pi 3b+ isn't connected to the switch, but I can ping it, and the other 2 work. Perhaps something wrong with the ether net socket because I see the yellow light, but no green light like is see on my 4b's

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$ ping 192.168.0.203
PING 192.168.0.203 (192.168.0.203) 56(84) bytes of data.
64 bytes from 192.168.0.203: icmp_seq=1 ttl=64 time=0.347 ms
64 bytes from 192.168.0.203: icmp_seq=2 ttl=64 time=0.285 ms
64 bytes from 192.168.0.203: icmp_seq=3 ttl=64 time=0.324 ms
64 bytes from 192.168.0.203: icmp_seq=4 ttl=64 time=0.292 ms

If it is the ethernet socket, "no green light", where might i find a troubleshooting spot for that?

Thanks in advance.

[rpdom]

If it is the ethernet socket, "no green light", where might i find a troubleshooting spot for that?

You won't because that is normal when a 3B+ is connected at 1000Mb/s

[kwlii]

I read that 3b+ could only use 100 mb, so I need to set the port on the switch. I am trying to figure out how to do that now on my GS105E.
Thanks

[rpdom]

You'll only get a maximum throughput of about 400Mb/s on a Pi 3B+ due to the limitations of the USB2 bus, but it will connect at a link speed of 1000Mb/s.

I use GS108 and GS116 switches and have no problems with them.