Mac Addresses For Host Ethernet Adapters - IBM Power PS700 Installation And User Manual

The routing of an Ethernet controller to a particular I/O-module bay depends on the type of blade server.
You can verify which Ethernet controller is routed to which I/O-module bay by using the following test:
1. Install only one Ethernet switch module or pass-thru module in I/O-module bay 1.
2. Make sure that the ports on the switch module or pass-thru module are enabled. Click I/O Module
Tasks > Admin/Power/Restart in the management-module Web interface.
3. Enable only one of the Ethernet controllers on the blade server. Note the designation that the blade
server operating system has for the controller.
4. Ping an external computer on the network that is connected to the switch module or pass-thru
module. If you can ping the external computer, the Ethernet controller that you enabled is associated
with the switch module or pass-thru module in I/O-module bay 1. The other Ethernet controller in
the blade server is associated with the switch module or pass-thru module in I/O-module bay 2.
If you have installed an I/O expansion card in the blade server, communication from the expansion card
should be routed to I/O-module bays 3 and 4, if these bays are supported by your BladeCenter unit. You
can verify which controller on the card is routed to which I/O-module bay by performing the same test
and using a controller on the expansion card and a compatible switch module or pass-thru module in
I/O-module bay 3 or 4.

MAC addresses for host Ethernet adapters

Two integrated Ethernet controllers in the PS700 blade server provide a Host Ethernet Adapter (HEA)
that, in turn, provides virtual logical host Ethernet adapters (LHEAs) to client logical partitions (LPARs).
The Virtual I/O Server software uses LHEAs as if they were real physical adapters.
The logical HEAs in the PS700 blade server bypass the need for further bridging from Virtual I/O Server,
because the LHEAs connect directly to the integrated Ethernet controllers in the blade server, and from
there to the I/O modules in the BladeCenter unit.
The PS700 blade servers use two physical HEA ports and 14 logical HEA ports to share the two
integrated physical Ethernet adapters on the blade server. The 14 logical HEA medium access control
(MAC) addresses are in the same range as the two integrated Ethernet controllers (eth0 and eth1) and the
two associated physical HEA ports on the blade server.
The MAC addresses of the two physical HEAs are displayed in the advanced management module. The
MAC address of the first integrated Ethernet controller (eth0) is listed on a label on the blade server. The
label also lists the last MAC address. Table 6 shows the relative addressing scheme.
Table 6. MAC addressing scheme for physical and logical host Ethernet adapters
Node
Integrated Ethernet
controller eth0
Integrated Ethernet
controller eth1
HEA port 0
HEA port 1
Logical HEA ports
Logical HEA port
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Power Systems: Installation and User's Guide for the IBM Power PS700 (8406-70Y)
Name in management
module
MAC address 1
MAC address 2
Relation to the MAC that
is listed on the PS700 label
Same as first MAC address
MAC + 1
MAC + 2
MAC + 3
MAC +4 to MAC +16
MAC +17
Same as last MAC address
on the label
Example
00:1A:64:44:0e:c4
00:1A:64:44:0e:c5
00:1A:64:44:0e:c6
00:1A:64:44:0e:c7
00:1A:64:44:0ec8 to
00:1A:64:44:0ed4
00:1A:64:44:0ec8 to
00:1A:64:44:0ed4