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1. Overview of Vnet/IP

1-13

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 congured 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 congure 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

YOKOGAWA Vnet/IP User Manual

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