YOKOGAWA Vnet/IP, Technical Information

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1. Overview of Vnet/IP
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TI 30A10A05-01E
1.4 Vnet/IP System Structure
In Vnet/IP, a region that uses only layer 2 switches for connections without using devices
such as a V net router or layer 3 switch is referred to as a Vnet/IP domain. Vnet/IP builds a
network for each domain.
When building networks, it is important to consider the limitations for each domain and
for all the domains.
n
Vnet/IP domain
In a Vnet/IP domain, Vnet/IP stations are connected to layer 2 switches that are configured by
star or ring topology.
There can be up to 64 Vnet/IP stations connected in a Vnet/IP domain. If more than 64 Vnet/IP
stations are connected, domains can be separated to increase the number of stations connected.
In a CENTUM and ProSafe-RS system, you can configure up to 16 domains, which can be a
combination of Vnet/IP, V net, and VL net (CENTUM only) domains.
You can connect up to seven levels of layer 2 switches in a Vnet/IP domain. There is no limit on
the number of layer 2 switches that you can use in the domain. However, there should not be
more than seven layer 2 switches used in between stations.
010401E.ai
L3SW
L2SW
Vnet/IP Domain Vnet/IP Domain Vnet/IP Domain
V net Domain
V net
router
L2SW L2SW
Figure Sample Structure of Multiple Domains
• Number of Vnet/IP stations per domain: Up to 64 stations
• Levels of layer 2 switch connection per domain: Up to 7 levels
• Number of domains in the system: Up to 16 domains
Dec. 26, 2016-00