IBM NeXtScale System Planning And Implementation Manual page 180

Remote access to the IMM2 is provided by an Ethernet connection. The
nx360 M4 has a dedicated port that allows direct access to the IMM and provides
a separate physical connection. However, IMM can be configured to be accessed
through the first on-board 1 Gb Ethernet port, which results in less cabling and a
shared physical link to the IMM and the Ethernet port. Figure 7-2 displays both
ports that allow access to IMM.
Eth1/IMM2 Shared port IMM2 dedicated port
Figure 7-2 IMM2 dedicated and shared port
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IBM NeXtScale System Planning and Implementation Guide