IOT devices and internet connection

[Arielis]

Hi,

Ive got one PC with two ethernet cards:

- On one card some IOT devices are connected

- On the other card, we`ve got the internet connection

When the IoT devices are connected to the ethernet card, we lose the internet connection.

IoT Network 1= Ethernet Card 1

The IP address of the card:

IP:1.1.1.9

Subnet:255.255.255.0

Network 2 =  Ethernet Card 2

DHCP

Happy to share the wireshark files if needed. Attached are the wireshark files from both cards. What could be the reason when connecting the IoT network, the internet connection goes down? Is it because we are using some IP addresses like 1.1.1.9?

Many thanks

[marce1000]

        - Check networking related log files when this happens, such as eventvwr on Windows (e.g.)

 M.  

[Arielis]

Hi Marce,

Thanks, I`ll check this. Can I send you the wireshark files?

Thank

[marce1000]

 - I am not a specialist in Wireshark. Other suggestions are : what error do you get in browser(s) when trying to access a website ? 2) What happens if you execute a tracert to a public ip address ?

 M.

[Arielis]

There are no errors when the other cable is not connected. I`ve only got an error saying we cannot access this page when I am connecting the cables with the IoT device.

Thank you

[marce1000]

            - Check the routing table on your PC when the IOT device gets  connected

 M.

[Georg Pauwen]

Hello,

what s the context of your question, what does the rest of your topology look like ? What is the PC connected to (switch --> router) and what brand/type/model is the rest of your equipment ?

[tanto.roni]

i have same problem with you

[Georg Pauwen]

Hello,

post a schematic drawing of your topology, showing which devices are in your network, and how they are (physically and logically) connected...

[paul driver]

Hello
You have two options

1- is to bridge both network cards so all users  access the same network.

start/run
ncpa.cpl

Selct both network cards then advanced/ bridge connections

2 - provide your IOT user the subnetmask/default gateway of the nic 1 and set a default route towards nic2 

IOT users
ip address = 1.1.1.x
Subnet mask = 255.255.255,0

Default-gateway = 1.1.1.9

route pc
Add persistant default route to point to the dhcp nexthop
netstat -r < this will give you the current route table/route metrics and interface numbers (IF) of your pc
route add 0.0.0.0 mask 0.0.0.0 x.x.x.x metric 1 IF x -p