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TCP connection in different subnet

Created by: leomauro at: 8/28/2009 9:16 AM (8 Replies)

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8/28/2009 9:16 AM	Rate (0)
leomauro Advanced Member Joined: 5/10/2006 Last visit: 3/10/2023 Posts: 19 Rating: (0)	Dear All, I need to make a TCP connection between a CP 343-1 Lean and other station with IP address in different subnet: CP 343-1 Lean (194.0.0.1), Other Station (194.1.0.3) through a router with IP address (194.0.0.3) If I entered this address, at compile time I get the following message: "Error: SIMATIC 300\CPU 314 : 0001 A050: The connection endpoints have different subnet addresses. Either change the addresses or use routers.". I can not change the IP addresses, and I don't know where and how to enter the router. Any help? Regards Mauro Attachment Network.jpg (307 Downloads)

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8/28/2009 11:08 AM	Rate (0)
gcor Advanced Member Joined: 7/17/2008 Last visit: 10/25/2013 Posts: 34 Rating: (2)	Hi leomauro, Attached you can find how to add a router in HW CP343 properties Regards Attachment router.JPG (488 Downloads)

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8/28/2009 11:21 AM	Rate (0)
smiffy Platinum Expert Joined: 1/17/2007 Last visit: 3/17/2023 Posts: 1523 Rating: (518)	You will need to specify that you want to use a router in the CP properties, which are accessed through the hardware configuration. Open hardware configuration, then double click on the CP, then select the properties button shown on the general tab. This will open another window called "Properties - Ethernet interface XXX". Select the Parmaters tab. On here you will see a use router check box. Check it and put your router address in the address box provided (in your case 194.0.0.3). See attached picture. Attachment userouter.jpg (438 Downloads)
	Programming today is the race between software engineers building bigger and better idiot proof programs, and the universe producing bigger and better idiots. So far, the universe is winning...
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8/28/2009 11:22 AM	Rate (0)
leomauro Advanced Member Joined: 5/10/2006 Last visit: 3/10/2023 Posts: 19 Rating: (0)	Thanks for your reply I have already entered the gateway address in HW CP343 properties (as in your attachment), but the error remains. The gateway address must be entered also in the Other Station? Regards
	Last edited by: leomauro at: 8/28/2009 11:24 AM
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8/28/2009 11:26 AM	Rate (0)
gcor Advanced Member Joined: 7/17/2008 Last visit: 10/25/2013 Posts: 34 Rating: (2)	Yes, you have to do it in the same way, the window is the same

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8/28/2009 11:32 AM	Rate (0)
leomauro Advanced Member Joined: 5/10/2006 Last visit: 3/10/2023 Posts: 19 Rating: (0)	gcor Yes, you have to do it in the same way, the window is the same Ok, but when I try to insert the gateway address (194.0.0.3) in the Other Station (194.1.0.3), I've a windows with the following message: "The two fields "IP Address" and "Router" must match within the subnet mask."

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8/28/2009 11:59 AM	Rate (1)
gcor Advanced Member Joined: 7/17/2008 Last visit: 10/25/2013 Posts: 34 Rating: (2)	Ok, The "other station" router IP mus to be something like 194.1.0.X, because that is the router function: Join differents subnet. In your case the the subnets 192.0.0.X and 192.1.0.X Like this _______Router_________ 192.0.0.1------------------192.0.0.3 < > 192.1.0.1--------------------192.1.0.3 The best configuration will be _______Router_________ 192.0.0.3------------------192.0.0.1 < > 192.1.0.1--------------------192.1.0.3 So you have to configure two diferents subnets in your router, by the way, wich router do you have? Regards

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8/28/2009 1:18 PM	Rate (0)
leomauro Advanced Member Joined: 5/10/2006 Last visit: 3/10/2023 Posts: 19 Rating: (0)	gcor So you have to configure two diferents subnets in your router, by the way, wich router do you have? At the moment I have not this information, the router is provided by the customer. You know any router that can configured two diferents subnets? Thanks and best regards

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8/28/2009 1:24 PM	Rate (0)
gcor Advanced Member Joined: 7/17/2008 Last visit: 10/25/2013 Posts: 34 Rating: (2)	Hi leomauro, All the routers can do it, because that is the main feature of them. If the device cannot do it, probabley you are talking about a switch Just in case, if you use the router Scalance X-400/Cisco/Enterasys, I can guide you with the configuration. Regards

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