8456ch_components.fm Draft Document for Review January 22, 2020 8:31 pm The Management Console also provides the functions for remote call-home and remote  support connectivity. For more information about the HMC, see Chapter 8, “IBM DS8900F Management Console  planning and setup” on page 203. 2.7.1 Ethernet switches The DS8900F base frame has two 8-port Ethernet switches in the Management Enclosure  (ME). The two switches provide two redundant private management networks. Each central  processor complex (CPC) flexible service processor (FSP) and each CPC logical partition  (LPAR) network is connected to both switches. Each of these components, FSP and LPAR is  using their own designated interface for the black and another one for the gray network.  These components are connected to the external breakout ports of the ME. Each HMC is also using two designated ethernet interfaces for the internal black (eth0) and  gray (eth3) networks. As the HMCs are installed in the ME they are already connected  internally to the switches without routing them to outside connections of the ME. Each CPC includes connections to each switch to allow each server to access both private  networks. These networks cannot be accessed externally, and no external connections are  allowed. External client network connection to the DS8900F system is through dedicated  connection to the Management Consoles.  The switches receive power from the PSUs inside the ME and do not require separate power  outlets. The ports on these switches are shown in Figure 2-31. The DS8950F has two 24-port switches (one for the grey and one for the black private  network) at the bottom of the base frame if an expansion frame is connected to the base  frame. These switches connect to the iPDUs in the expansion frame and the switches in the  Management Enclosure. 62  IBM DS8900F Architecture and Implementation Figure 2-31 8-port Ethernet switches (SW1 and SW2) in the Management Enclosure T1ports -> to iPDU E21 and E22 in base frame T2 ports -> to iPDU E23 and E24 in base frame T3 ports -> to CPC C1-T1 ports T4 ports -> to CPC C1-T2 ports T5 ports -> to CPC C11-T1 ports T6 ports -> to CPC C11-T2 ports T7 ports -> to HMC1 eth0 and eth3 ports T8 ports -> to HMC2 eth0 and eth3 ports or SW3-T1and SW4-T1 ports