Hitachi CB 520H A1 User Manual page 45

Figure 1-24 Definition of Network Segment ID on LPAR manager
Communications between NIC#0 on LPAR1 (assigned to segment 1av),
NIC#1 on LPAR2 (assigned to segment 1bv) and NIC#2 on LPAR2 (assigned
to segment 2av) have to go through external network.
Tip:
• Communication between VF NICs connected to the same network
segment does not use an external network. In contrast, communication
between VF NICs connected to different network segments takes place
over an external network.
Virtual NIC
Up to 4 Network Segment for Virtual NIC can be defined on an LPAR
manager. NIC assigned the network segments is called "Virtual NIC". Virtual
NIC can communicate through no physical NIC network between LPARs.
Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide
LPAR manager Functions
1-31