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Guest rkduet

EtherNet/IP Network Addressing

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I have looked and so far can not find a standard class or range within a class for Industrial Ethernet/IP addressing. I would like to follow a standard if I can . I have 15 nodes on 7 switches to create one segment that will eventually tie to a gateway router. How do I determine what to address these item statically. I will not have a SCADA initially sorunning BOOTP is out. Any pointers or answers or web sites would be helpful.

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I don't know of any myself. I just always use: 192.168.1.x for any network that is internal. So far I've not run into any problems.

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Two cases exist concerning how to choose your IP address: Joining an existing network: The System Administrator will assign it to new nodes. Creating a private network: You can choose any non-reserved IP addresses Do not use 0, 1, 127 or 255 or addresses beginning with values greater than 223 as they have special meanings Also private internet address are in the form 169.254.xxx.xxx , 10.xxx.xxx.xxx or 192.168.xxx.xxx as these addresses are guaranteed not to be in use on the internet Some IP addresses have a special or reserved meaning 0.0.0.0 The default gateway address to which packets are sent if they do not belong on the local network. 127.0.0.1 Local loopback address useful for diagnostic checks using the ping utility 224.0.0.0 Default multicast address 255.255.255.255 Limited broadcast address A broadcast to any machine on the local network The first octet of an IP address will show the class to which the address belongs:- 1 to 126 is Class A which will support upto 16,777,214 hosts 128 to 191 is Class B which will support upto 65,534 hosts 192 to 223 is Class C which will support upto 254 hosts Even when networking 254 hosts it is unlikely that they will all be in the same physical location, and therefore the network is constructed in smaller subnets An IP address can be interpreted as two fields:- netid + hostid or with a subnet mask applied netid + subnetid + hostid The subnet mask shows which bits are the netid and which are the hostid 255.255.255.0 = 11111111 11111111 11111111 00000000 255.255.0.0 =11111111 11111111 00000000 00000000

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