HP BladeSystem c3000 Tower Enclosure Setup and Installation Guide

Installing components 39
Connection Port number Connects to interconnect
bay/port
Comments
Mezzanine slot 1—
1x, 2x, or 4x cards
Server A: Mezz port 1
Server A: Mezz port 2
Server B: Mezz port 1
Server B: Mezz port 2
3/Port N
4/Port N
3/Port N+8
4/Port N+8
• Two single-wide
modules or one double-
wide interconnect
module
• Only two ports will be
connected.
• Four port cards will only
connect the first two
ports.
Bay-to-bay crosslinks
For bay-to-bay communication, the enclosure midplane provides four-trace SerDes signals between
adjacent bays.
Device bay crosslinks
Device bay crosslinks are wired between adjacent horizontal device bay pairs.
For half-height blades, these crosslinks are used to connect a four-lane PCIe module to a partner blade
such as a tape blade or a PCI expansion blade. For full-height blades, these signals are used to connect a
PCIe module to a partner blade in the lower adjacent bay and require a PCIe pass-thru mezzanine card
installed in mezzanine connector 3. The Onboard Administrator disables the device bay crosslinks in
instances where they cannot be used, such as when two blades reside in adjacent device bays.