HP-UX Serviceguard Heartbeat Configuration Solutions

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Figure 1
Systems with more Heartbeat interfaces than Processors
• If you have more Heartbeat interfaces than processors (count both primary and standby
interfaces):
1) Assign each primary interface to a different processor until all processors have one
primary interface. Then, follow either (a) or (b).
a) If there are still some unassigned primary interfaces (e.g., you ran out of
processors to assign the primary interfaces), assign the remaining primary
interfaces to separate processors even if this creates overlap with those assigned
in (1) until all primary interfaces have been assigned to a processor. Attempt to
spread the assignments as evenly as possible across the processors.
OR
b) If you have assigned all the primary interfaces and still have some processors
available, then begin assigning standbys until you have all assigned all
processors an interface (either a primary or standby).
2) Assign any remaining standby interface(s) to the same processor as its associated
primary interface.
In the following picture (Figure 2), we have 3 heartbeat pairs (non-Link Aggregate). There
are primary and standby #1 (P1 and S1), primary and standby heartbeat #2 (P2 and S2),
and primary and standby heartbeat #3 (P3 and S3). Since we have 6 interfaces but only 4
processors, we will have overlap. We assign the primaries to separate processors and as
many standbys to separate processors. When we begin to overlap, we assign the remaining
standbys to processors which have their primary already assigned as shown.