Administrator's Guide

Configuring HyperFabric
Configuring HyperFabric with ServiceGuard
Chapter 490
How HyperFabric Handles Adapter Failures
HyperFabric adapters are handled differently than other types of
networking adapters (such as Ethernet, FDDI, and Fibre Channel) in the
ServiceGuard environment. In the non-HyperFabric cases, two network
links are in a node, and one will be active and one will be idle or in
standby. In the case of an active link failure, ServiceGuard is notified and
the network traffic is switched to the standby adapter (which then
becomes active).
However, in the case of HyperFabric, if two adapters are in a node, both
will be active. If one active HyperFabric adapter fails, its network traffic
is switched to the other active HyperFabric adapter in the node.
(Throughput might be slower because only one active adapter is now
handling the network traffic.) This rearrangement is handled by the
HyperFabric software, and ServiceGuard is not notified. However, note
that if all of the HyperFabric adapters fail, HyperFabric does notify
ServiceGuard. In both cases, though, the events are logged to
/var/adm/clic_log and /var/adm/syslog.log.