Compaq ProLiant 1600 Administrator's Manual page 23

Architecture of the Compaq ProLiant Clusters HA/F100 and HA/F200 1-11
Cluster Interconnect
Two types of cluster interconnect cables may be used depending on the type of
devices used to implement the interconnect, and whether the interconnect is
dedicated or shared:
1. Ethernet
If Ethernet NICs are used to implement the interconnect, there are three
options:
Dedicated Interconnect Using an Ethernet Crossover Cable:
An Ethernet crossover cable (supplied in both the HA/F100 and
HA/F200 kits) can be used to connect the NICs directly together to
create a dedicated interconnect.
Dedicated Interconnect Using Standard Ethernet Cables and a
private Ethernet Hub: Standard Ethernet cables can be used to
connect the NICs together through a private Ethernet hub to create
another type of dedicated interconnect. Note that an Ethernet
crossover cable should not be used when using an Ethernet hub
because the hub performs the crossover function.
Shared Interconnect Using Standard Ethernet Cables and a
Public Hub: Standard Ethernet cables may also be used to connect
the NICs to a public network to create a nondedicated interconnect.
2. ServerNet
If Compaq ServerNet adapters are used to implement the interconnect,
special ServerNet cables must be used.
Network Interconnect
Standard Ethernet cables are used to provide this type of connection.