Subnet Rules with Layer 3 Switches
Thinking about subnets when using Layer 3 switches requires a little more work. When a network diagram uses router icons, there is a clear division of where the IP subnets will be needed, as demonstrated previously in Figure 13-3. By contrast, consider Figure 13-4, which shows a Nexus switch, which can be configured as a Layer 3 switch. Which of the four servers should be in the same subnet, and which should be in different subnets?
Figure 13-4 The Lack of Information Makes It Unclear Which Servers Are in Which Subnets
To know where subnets should exist when using Layer 3 switches, you must know what VLANs ...
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