Ping over diffent networks

Question

Ping over diffent networks

Nicolai Madsen 1

Hi Every body

I really hope some one could help me, I am barely new to work between two different networks.

Now to the question.

I have setup like the attach picture shows.

After I have tried a lot where I have used ROUTE ADD and enabled IPRouting on PC2, then it is possible for me to ping between PC1 and PC3, but i want to ping between PC1 and Laptop 2. I really don't know what to do, to ping from PC1 to laptop 2. PC 1 and 2 have network interfaces and are running Windows 10, but PC3 have a build in switch and are running Windows CE.

Hope some one could help me.

BR
Nicolai

risolis 8,741 Reputation points

2022-05-06T07:25:16.123+00:00

Hello @Nicolai Madsen

Thank you for your post.

Is this physical set up or on a Hyper-V environment?
What do you see when you check the route table for issue device? Route print command from CMD terminal.,..

BR,
Nicolai Madsen 1 Reputation point

2022-05-06T07:55:21.837+00:00

hi @risolis

Thank you for the reply!

This is physical set up, I have attached the route prints

6 answers

Your answer

risolis 8,741 Reputation points

2022-05-06T07:25:16.123+00:00

Hello @Nicolai Madsen

Thank you for your post.

Is this physical set up or on a Hyper-V environment?
What do you see when you check the route table for issue device? Route print command from CMD terminal.,..

BR,
Nicolai Madsen 1 Reputation point

2022-05-06T07:55:21.837+00:00

hi @risolis

Thank you for the reply!

This is physical set up, I have attached the route prints

Answer 1

risolis 8,741

Hi @Nicolai Madsen

Thank to you as well for your answer.

If I am not mistaken you stated you configured static routes but some of the outputs does not show persistent routes....

Did you run a Tracert command as well?

BR,

Nicolai Madsen 1 Reputation point

2022-05-06T08:10:03.87+00:00

Hi

I did not know much about this, but in start I started to make the persistent, but sudently the network did not work any more. After I have reinstalled the PC's the I have learned that if I did not use the -p then a restart of the PC will delete the change. Hope that you can tell me where to make the ROUTE ADD, and what to write.

I have forgot to mention that I am able to ping from laptop 2 to PC 2 and PC 3.

BR.

Answer 2

risolis 8,741

I just wanted to recap the details given.

The subnets on this scenario are the ones below:

-10.75.16.0/24
-10.75.17.0.24

Is the set up connected or configured like this?

laptop2 is on 10.75.17.0/24
PC1 is on 10.75.16.0/24
PC2 is on 10.75.16.0/24 and 10.75.17.0/24 on each of their NICs
PC3 is on 10.75.17.0/24

Did you enabled Routing and Remote Access service/IP forwarding?

BR,

Nicolai Madsen 1 Reputation point

2022-05-06T08:35:04.257+00:00

Yes you are right about the setup.

I have enabled this on PC2, nothing else

"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters.
risolis 8,741 Reputation points

2022-05-06T08:59:19.62+00:00

Please check the metric for the static routes on PC2 as well as the next hop...

Let me know how it goes...

If you want to check the path taken, just do a tracert from laptop to the PC and viceversa.

BR,
Nicolai Madsen 1 Reputation point

2022-05-06T09:02:31.737+00:00

Hi

Could you please elaborate what you want to test a bit more? Now we are starting to use some words that I have heard but newer got the complete understand of ;)

BR
risolis 8,741 Reputation points

2022-05-06T09:09:56.12+00:00

Sure.

For instance, this is the output for PC2's ip table below:

If I am not mistaken you have 2 next hops ending in .218 and .238 as well as 2 static routes for each subnet address with different metric.

Then, the command Tracert is the next one:

So, you need to adjust it by using the IP of each host device.

BR,
Nicolai Madsen 1 Reputation point

2022-05-06T09:14:49.953+00:00

Hi

As you told me earlier, you want me to make a tracert from Laptop 2 and from PC 1, and then send the result to you?

BR,
risolis 8,741 Reputation points

2022-05-06T09:16:12.867+00:00

if it is possible please
Nicolai Madsen 1 Reputation point

2022-05-06T09:30:28.333+00:00

I have made a tracert from PC1 to Laptop2 and from Laptop2 to PC1.

Hope it gives more meaning for you than it does for me.
risolis 8,741 Reputation points

2022-05-06T09:58:38.8+00:00

which device is using 10.75.17.1 on the NIC?
Nicolai Madsen 1 Reputation point

2022-05-06T10:09:38.273+00:00

I could see that it was the wifi on laptop 2 that had that IP, I have shutdown for the WIFI on laptop2, and made the tracert from laptop2 to PC1 once again.

Just for test, then I have made a tracert from laptop2 to PC2 (10.75.17.238) as you can see on the picture.
risolis 8,741 Reputation points

2022-05-06T10:17:32.803+00:00

add a static route for network 10.75.16.0 with next-hop ending in .238 please
Nicolai Madsen 1 Reputation point

2022-05-06T10:38:13.763+00:00

Should I add that on Laptop2?
And I should type this in CMD, right?
route add 10.75.16.0 mask 255.255.255.0 10.75.17.238
risolis 8,741 Reputation points

2022-05-06T10:55:05.157+00:00

yes please
Nicolai Madsen 1 Reputation point

2022-05-06T11:06:56.07+00:00

I have added the route but I can not ping 10.75.16.217?
risolis 8,741 Reputation points

2022-05-06T11:16:23.433+00:00

Can I get the IP configuration of your NIC devices?
Nicolai Madsen 1 Reputation point

2022-05-06T11:26:18.067+00:00

I could see that I had made a typing error then I should make the route so I had wrote 10.15.16.0 instead of 10.75.16.0. I have made a new route for 10.75.16.0 now, as you can see

I have attached the Ip Config for all the PC's

Answer 3

risolis 8,741

I see it now... You are missing default gateways on your PC's : )

This is observed on your outputs above:

Nicolai Madsen 1 Reputation point

2022-05-06T11:41:06.023+00:00

ohhh could you please tell what to type here, because I had tried different things and none worked, so I hope you could help me here?
Nicolai Madsen 1 Reputation point

2022-05-06T12:14:39.82+00:00

@risolis

Thank you, but could you please tell what to type here, because I had tried different things and none worked, so I hope you could help me here?
risolis 8,741 Reputation points

2022-05-06T12:19:46.47+00:00

here it is the most detailed document found for you to get this configured having default gateway in blank.

Case 4: Connecting to Two Routed Networks (advanced)

https://www.ni.com/es-cr/support/documentation/supplemental/11/best-practices-for-using-multiple-network-interfaces--nics--with.html

BR.
risolis 8,741 Reputation points

2022-05-06T16:20:04.5+00:00

Hi @Nicolai Madsen

Did you go over the link given above?

BR,

Answer 4

risolis 8,741

Hello @Nicolai Madsen

I hope you are doing fine.

I wanted to know if your concern was address correctly or further assistance might be needed.

BR,

Nicolai Madsen 1 Reputation point

2022-05-09T06:09:07.227+00:00

Hi @risolis

Will look at this link in this week. I will return if I need anyone assistance.
For now, thank you very much for the help

BR,
risolis 8,741 Reputation points

2022-05-09T06:18:40.223+00:00

Your welcome!
risolis 8,741 Reputation points

2022-05-14T00:19:34.55+00:00

Hi,

I wonder if you were able to get it working or if you need further help : )

BR,

Answer 5

Hi there,

Turn Off Windows Firewall on PC1 and Laptop 2 . It might reject PING from different Networks.

Your route table will be helpful in identifying the possible ping configurations. You should be able to ping either IP on a separate ping operation, without issue, if your PC is aware of where those networks are. If the routes aren't already there, you should be able to add them yourself.

route add -p <network> mask <subnet mask> <gateway>

My suggestion would be to have a check once on setting up the Routing and Remote Access.

This step-by-step article describes how to set up a Routing and Remote Access service on Windows. By default, the Routing and Remote Access service are installed automatically during the Windows installation, but it is disabled.

How to set up Routing and Remote Access for an Intranet https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/set-up-routing-remote-access-intranet

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Ping over diffent networks

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