User guide

14 Implementing Cisco InfiniBand on IBM BladeCenter
The 4X InfiniBand HCAs installed in the blade servers are PCI Express x4 cards with two
output ports that are routed to bays 7 and 9. Two 4X InfiniBand high-speed switch modules
are installed in these bays (two modules provide redundancy). Because the 4X InfiniBand
HCA is a two-port card and not a four-port card, bays 8 and 10 are not connected.
The bridge module bays used in this configuration are bays 3 and 5, as shown in Figure 1-8.
Bridge modules in bays 3 and 5 can be a redundant pair or one can be a InfiniBand-to-Fibre
Channel bridge, and the other can be an InfiniBand-to-Ethernet bridge. See Chapter 2,
“InfiniBand products for BladeCenter” on page 15 for details about these bridge modules.
Bays 4 and 6 are also suitable for bridge modules, but these bays are not used in this
configuration because the 4X InfiniBand HCA does not have a third and fourth port.