HP XC System Software Hardware Preparation Guide Version 3.0

it may be an installed card, as with the HP Integrity rx2600 server. Any node with an external interface must
also have a third Ethernet connection of any kind to communicate with external networks.
Administration Network Interconnect Connections
In cases where an additional Gigabit Ethernet port or switch may not be available, the HP XC System
Software allows the interconnect to be configured on the Administration Network. When the interconnect is
configured on the Administration Network, only a single LAN is used.
However, be aware that configuring the system in this way may negatively impact system performance.
To configure the interconnect on the Administration Network, you include the --ic=AdminNet option on
the discover command line, which is documented in the HP XC System Software Installation Guide .
If you do not specify the --ic=AdminNet option, the discover command attempts to locate the highest
speed interconnect on the system with the default being a Gigabit Ethernet network that is separate from the
Administration Network.
Other Types of Interconnect Connections
The other interconnect types that are supported (such as Myrinet and InfiniBand) do not have the ordering
requirements of the Quadrics interconnect, but it makes sense to structure it in parallel with the other two
networks in order to make your connections easy to maintain and service.
The port numbering on these other interconnect switches starts at number 1 in contrast to the port numbering
on the Quadrics interconnect switch, which starts at number 0.
Interconnect Connections 29