Managing Serviceguard Eighteenth Edition, September 2010

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.
For information about implementing APA with Serviceguard, see the latest version of
the HP Auto Port Aggregation (APA) Support Guide and other APA documents posted
at www.hp.com/go/hpux-networking-docs.
VLAN Configurations
Virtual LAN configuration using HP-UX VLAN software is supported in Serviceguard
clusters.
104 Understanding Serviceguard Software Components