Bull Escala BL460, Problem Determination And Service Manual, Page: 257 / 266

Chapter 5. Configuring
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5.7 MAC addresses for host Ethernet adapters
Two integrated Ethernet controllers in the Escala BL460 blade server each 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 (VIOS) software uses LHEAs as if
they were real physical adapters.
The logical HEAs in the Escala BL460 blade server bypass the need for further bridging
from VIOS, because the LHEAs connect directly to the integrated Ethernet controllers in the
blade server, and from there to the I/O modules in the Bull Blade Chassis - Enterprise.
The Escala BL460 blade server uses 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 Chassis 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. The following table
shows the relative addressing scheme.
Node
Name in
management
module
Relation to the
MAC that is listed
on the Escala
BL460 blade
server label
Example
Integrated Ethernet
controller eth0
Same as first MAC
ddress
00:1A:64:44:0e:c4
Integrated Ethernet
controller eth1
MAC + 1
00:1A:64:44:0e:c5
HEA port 0 MAC address 1 MAC + 2
00:1A:64:44:0e:c6
HEA port 1 MAC address 2 MAC + 3
00:1A:64:44:0e:c7
Logical HEA ports
MAC +4 to MAC +16
00:1A:64:44:0ec8 to
00:1A:64:44:0ed5
Logical HEA port
MAC +17
Same as last MAC
address on the label
00:1A:64:44:0ec8 to
00:1A:64:44:0ed5
Table 5-1. MAC addressing scheme for physical and logical host Ethernet adapters
For more information about planning, deploying, and managing the use of host Ethernet
adapters, see the Configuring section of the PowerVM Information Roadmap .