Cabling the HMC and FSP or eBMC

Resolving The Problem

This document shows how to cable the Ethernet connection from the HMC to the managed Server FSP,  or eBMC.

Note: Determine the physical location of the HMC in relation to the servers it manages. If the HMC is more than 25 feet from its managed system, you must provide web browser access to the HMC from the managed system's location so that service personnel can access the HMC. If this distance specification is not adhered to, the hardware warranty of the managed system can be voided.

This document assumes the typical configuration where the HMC eth0 port is configured as a DHCP server on a private network and cabled to the HMC1 port on the managed server. The location of the HMC eth0 port varies depending not only on the HMC model but also the number and type of adapters as well as the version of HMC. However, the information contained in this document shows the typical location of eth0 it is highly recommended that you confirm the location by testing for link status changes.

Locating eth0 using link status
This technique assumes you have a good CAT 5 or CAT 6 Ethernet cable connected to another active Ethernet port (the FSP HMCx port or a switch port). To use link status to locate eth0, do the following:

Note: Starting with V7R3.3.0, the first boot after installation fixes the eth0 interface location to a particular adapter by saving the location to disk. To check for this, you can view (in other words, with cat, less, or more) the net-persisent-names file located in /etc/udev/rules.d/30-net_persistent_names.rules. This file is used to associate the interface to particular port so it will not change when adding an optional Ethernet adapter.

Rack HMC Model 7063-CR2

                                                           eth4  eth5  (if the additional adapter is present)

Rack HMC Model 7063-CR1


Rack HMC Model 7042-CR9

Rack HMC Model 7042-CR7, 7042-CR8




Rack HMC Model 7042-CR5 and 7042-CR6

The additional dual port Ethernet card is standard on the CR5. eth0 is the port labeled Ethernet 1.



Rack-Mounted HMC Model (7310/7042-CR4)

Note: When an optional 2-port PCI-X Ethernet adapter is installed in either of the optional PCI expansion slots, the right side Ethernet port becomes eth0 (stamped act/lnk A). Port A is normally the right port when viewing the HMC from the back of the machine.

Rack-Mounted HMC Model (7310/7042-CR3)

Note: When an optional FC.5706, 2-port PCI-X Ethernet adapter is installed in either of the optional PCI expansion slots, the right side Ethernet port becomes eth0 (stamped act/lnk A). Port A is normally the right port when viewing the HMC from the back of the machine.

Rack-Mounted HMC Model (7310-CR2)

Back view of a rack-mounted HMC





The location of the eth0 varies depending on the number of Ethernet adapters.

Floor standing HMC Model (7310/7042-C06 and 7042-C07)

Back view of a stand-alone HMC




eth0 will be the system board planar connection (Ethernet) except when there is an Ethernet expansion adapter installed. When an Ethernet adapter is installed in an expansion slot, it becomes eth0, depending on what other options are installed. The general rules for the location of eth0 include:

For some example configurations, refer to Table 3.

Table 3. eth0 with 7310-C07, C06, C05 HMC

Floor standing HMC Model (7310/7042-C05)

Back view of a stand-alone HMC



See Table 3 above.

Desktop HMC Models (7310/7042-C04)

Back view of a stand-alone HMC




eth0 will be the system board planar connection (Ethernet port 1) except when there is an Ethernet expansion adapter installed. Unlike like the 7310-C03, when a 10/100 e-net Ethernet adapter is installed in an expansion slot, it might become eth0, depending on what other options are installed. The general rules for the location of eth0 include:

For some example configurations, refer to Table 2.

Table 2. eth0 with 7310-C04 HMC

Desktop HMC Models (7310-C03)

Back view of a stand-alone HMC

5 
eth0 will be the system board planar connection (Ethernet port 1) except when there is a 1 GB Ethernet expansion adapter (FC.5701) in slot 2 or 3. Refer to Table 1. Do not install an FC.5701 1 GB Ethernet PCI card in slot 1.

Table 1. eth0 with 7310-C03 HMC

                                                                                                                                 Power10 Servers

9105-41B, 9105-42A, or 9786-42H

9080-M9S

9040-MR9

9009-22A, 22G, 9008-22L, 9223-22H, 22S, 5105-22E

9009-41A, 42A, 41G, 42G, 9223-42H, 42S

9119 and 9080-MHE and MME
system control unit

Un-P1-C7-T3 Service processor card 1 - HMC port 1
Un-P1-C7-T6 Service processor card 1 - HMC port 2
Un-P1-C10-T3 Service processor card 2 - HMC port 1
Un-P1-C10-T6 Service processor card 2 - HMC port 2

8286 41A and 42A

Note: On POWER7 Systems, the FSP ports are no longer labeled HMC1 and HMC2.

8231-E1C POWER 710
8231-E2C POWER 730


8202-E4C POWER 720
8205-E6C POWER 740


8202-E4B POWER 720
8205-E6B POWER 740



9117-MMB IBM Power 770
9179-MHB IBM Power 780
9117-MMC/D IBM Power 770
9179-MHC/D IBM Power 780
Note: For multi-enclosure systems, the FSP is active and must be cabled in the top two enclosures.


8233-E8B IBM Power 750 Express
8236-E8C IBM Power 755

9119-FHB
Note: HMC-A (front/P1) and HMC-B (back/P2) Px-C4-J01 port of the Bulk Power Assemblies (BPA).

View of POWER6 525 models 9407-M15, 9408-M25, 8203-E4A



View of POWER6 550 models 9409-M50, 8204-E8A

View of POWER6 570 models 8234-EMA, 9117-MMA, and 9406-MMA

Rear View of a Model 9406-520,515,525 Server



Rear View of a Model 9406-550 Server


Rear View of a Model 9406-570 Server




View of a Model 595