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## 8.4.2 Private Networks 

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The internal private networks (black and gray) are using the IP ranges of 172.x.x.x by default. You need to make sure that the network which is used for the internal private network is not interfering with outside network ranges used by any network that the management console can reach. 

If the default address range cannot be used because it conflicts with another network, you can instead specify one of three optional addresses ranges. Table 8-2 shows the possible options that can be chosen during installation. 

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The change of the internal private network is not the configuring of each individual network interface. It is set as a whole setting for both black and gray networks in one step. 

Figure 8-15 shows the how the setting is made., by selecting HMC Management → Query/Change IP Range 

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