3. Vnet/IP Network Configuration without using Information Network
3-4
TI 30A10A05-01E
n
Host address for open communications
Select the host address for open communications from the range of Vnet/IP network
addresses—which are 130 to 253—that you can use in open communications. The default host
address for recommended layer 3 switches is set to 253. Ensure that the host address is not
duplicated in Vnet/IP stations and all other devices in a Vnet/IP domain.
030202J.ai
For control communications (2~129)
For open communications (130~253)
253
For SNTP server (254)
254
130
129
1
L3SW (Default Setting: 253)
2
Reserved
Figure Host Address Allocation
n
Virtual IP address for control network TCP/IP communications
The control network TCP/IP protocol is used for communications such as downloading recipes
in CENTUM from HIS to FCS. Vnet/IP protocols support encapsulated control network TCP/
IP protocols or TCP/IP over V net to remain compatible with the existing V net system. For this
purpose, you have to set a virtual IP address. In normal conditions, use the following default IP
address that is automatically determined by the domain number and station number:
• IP address:
172.16.<domain number>.<station number>
• Subnet mask:
255.255.0.0
030203E.ai
IP address for control communications
IP
UDP
Vnet/IP protocol
Control application
TCP/IP
over V net
Virtual IP addres for TCP/IP over V net
Figure Virtual IP address for control network TCP/IP communications
Aug.19,2011-00
Содержание Vnet/IP
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