Eth2 - Strange beahvior

[Utilsea]

Hello,
currently configurin on RevPi 4S with our own software, I notice a strage behaviour of the eth2 interface.

eth1 is connected to our router allowing remote access using ANYDESK.
We need eth2 enabled and connecteded to our S-IOT (Subsea IOT) gateway.

Here below the configuration we have :

Eth2 :
IPV4 configuration : manual
address : 169.254.197.100
Gateway : 169.254.197.1
DNS server : 169.254.197.1

on our system :
fix IP
address 197.254.197.52
Server listen on port 2105

The strange things is that when pinging I got the follwing :
pi@RevPi100363126022:~$ ping 169.254.197.52
PING 169.254.197.52 (169.254.197.52) 56(84) bytes of data.
From 169.254.197.100 icmp_seq=1 Destination Host Unreachable
From 169.254.197.100 icmp_seq=5 Destination Host Unreachable
From 169.254.197.100 icmp_seq=6 Destination Host Unreachable
From 169.254.197.100 icmp_seq=7 Destination Host Unreachable
From 169.254.197.100 icmp_seq=8 Destination Host Unreachable
From 169.254.197.100 icmp_seq=9 Destination Host Unreachable
From 169.254.197.100 icmp_seq=10 Destination Host Unreachable
64 bytes from 169.254.197.52: icmp_seq=12 ttl=255 time=0.436 ms
64 bytes from 169.254.197.52: icmp_seq=13 ttl=255 time=0.434 ms
64 bytes from 169.254.197.52: icmp_seq=14 ttl=255 time=0.396 ms
64 bytes from 169.254.197.52: icmp_seq=18 ttl=255 time=0.350 ms
From 169.254.197.100 icmp_seq=19 Destination Host Unreachable
From 169.254.197.100 icmp_seq=20 Destination Host Unreachable
From 169.254.197.100 icmp_seq=21 Destination Host Unreachable
From 169.254.197.100 icmp_seq=22 Destination Host Unreachable
From 169.254.197.100 icmp_seq=23 Destination Host Unreachable
From 169.254.197.100 icmp_seq=24 Destination Host Unreachable
^C
--- 169.254.197.52 ping statistics ---
26 packets transmitted, 4 received, +13 errors, 84.6154% packet loss, time 25574ms

We got an answer time to time and it is not suitable for our application ...

We also try to install a DNS/DHCP (DNSMASQ) for eth2 with more or less the same result.

Thanks in adavance

[nicolaiB]

Please share your network configuration. From the spare details you provided it looks like you have configured two default gateways and the traffic gets diverted.

Nicolai

[Utilsea]

Hello Nicolai,
thanks for answering.
for the moment after downgrading and to BULLSEYE and then upgrading to BOOKWORM I do not succeed to log on to the unit.
Look like login or password have been changed or lost.

Thanks in advance
Eric

[Utilsea]

Problem solved
at least for the login.

[Utilsea]

Hello,
back on my secondary ethernet interface problems who remain the same.
Device connected to this interface is only answering time to time to ping request.

The configuration is this as follow :

Eth0 --> connected to router for internet access (working well)
Eth1 --> connected to an ethernet switch then connected to our S-IOT.

S-IOT system configured as DHCP client (running an UDP listener allowing to recover the IPV4 address delivered by the RevPI)
On the RevPi DNSMASK installed with DNS server disabled.

Our network configuration :

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.22 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::5818:b986:dd60:15b6 prefixlen 64 scopeid 0x20<link>
inet6 2a01:cb08:86c8:ee00:b00a:4dec:c0b1:5a32 prefixlen 64 scopeid 0x0<global>
ether c8:3e:a7:12:42:55 txqueuelen 1000 (Ethernet)
RX packets 225 bytes 40928 (39.9 KiB)
RX errors 0 dropped 17 overruns 0 frame 0
TX packets 174 bytes 24111 (23.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 169.254.197.1 netmask 255.255.255.0 broadcast 169.254.197.255
inet6 fe80::4d7195b5:a000 prefixlen 64 scopeid 0x20<link>
ether c8:3e:a7:12:42:56 txqueuelen 1000 (Ethernet)
RX packets 29 bytes 2152 (2.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 97 bytes 12567 (12.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 53 bytes 6512 (6.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 53 bytes 6512 (6.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

pileft: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 96:b4:3d:c2:fb:9b txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 38

And DNSMASQ.CONF (uncommented lines only)
"
port=0 # to disable DNS server
interface=eth1
no-hosts
dhcp-range=eth1,169.254.197.50,169.254.197.55,12h
dhcp-authoritative
log-dhcp

Eth1 config.

↑│
│ Profile name Wired connection 2______________________ ▮│
│ Device eth1 (C8:3E:A7:12:42:56)________________ ▒│
│ ▒│
│ ═ ETHERNET <Show> ▒│
│ ═ 802.1X SECURITY <Show> ▒│
│ ▒│
│ ╤ IPv4 CONFIGURATION <Manual> <Hide> ▒│
│ │ Addresses 169.254.197.1/24_________ <Remove> ▒│
│ │ <Add...> ▒│
│ │ Gateway 169.254.197.1____________ ▒│
│ │ DNS servers 169.254.197.1____________ <Remove> ▒│
│ │ <Add...> ▒│
│ │ Search domains <Add...> ▒│
│ │ ▒│
│ │ Routing (No custom routes) <Edit...> ▒│
│ │ [ ] Never use this network for default route ▒│
│ │ [ ] Ignore automatically obtained routes ▒│
│ │ [ ] Ignore automatically obtained DNS parameters


And finally ping results (169.254.197.54 is our S-IOT system address delivered by DHCP):

ping 169.254.197.54
PING 169.254.197.54 (169.254.197.54) 56(84) bytes of data.
64 bytes from 169.254.197.54: icmp_seq=1 ttl=255 time=1016 ms
64 bytes from 169.254.197.54: icmp_seq=3 ttl=255 time=0.431 ms
64 bytes from 169.254.197.54: icmp_seq=9 ttl=255 time=0.373 ms
64 bytes from 169.254.197.54: icmp_seq=12 ttl=255 time=0.335 ms
^C
--- 169.254.197.54 ping statistics ---
[14 packets transmitted, 4 received, 71.4286% packet loss,[/i] [/b][/b]time 13304ms
rtt min/avg/max/mdev = 0.335/254.367/1016.329/439.918 ms, pipe 2


If somebody have an idea

thanks in advance.