Managing Serviceguard Fifteenth Edition, reprinted May 2008

Understanding Serviceguard Software Components
How the Network Manager Works
Chapter 3 109
Figure 3-19 Aggregated Networking Ports
Both the Single and Dual ported LANs in the non-aggregated
configuration have four LAN cards, each associated with a separate
non-aggregated IP address and MAC address, and each with its own
LAN name (lan0, lan1, lan2, lan3). When these ports are aggregated all
four ports are associated with a single IP address and MAC address. In
this example, the aggregated ports are collectively known as lan900, the
name by which the aggregate is known on HP-UX 11i.
Various combinations of Ethernet card types (single or dual-ported) and
aggregation groups are possible, but it is vitally important to remember
that at least two physical cards must be used in any combination of APAs
to avoid a single point of failure for heartbeat connections. HP-APA
currently supports both automatic and manual configuration of link
aggregates.