HP ProLiant BL660c HP BladeSystem c-Class architecture - Page 12

Figure 7. Logically overlaying physical lanes (right) onto sets of four traces (left) 1X Lane-0 2X Lane-0 Lane-1 4X Lane-0 Lane-1 Lane-2 Lane-3 1x (KX, KR, SAS, Fibre Channel) 2x (SAS, PCI Express) Lane-0 Lane-1 Lane-2 Lane-3 4x (KX4, InfiniBand, PCI Express) Connectivity between blades and interconnect modules The c-Class server blades use mezzanine cards to connect to various network fabrics. The connections between the mezzanine cards on the server blades and the interconnect modules are through independent traces on the NonStop signal midplane. Connections differ depending on the enclosure. The c7000 enclosure was designed for fully-redundant connections between the server blades and interconnect modules. As an example, Figure 8 shows how c-Class half-height server blades in the c7000 enclosure connect redundantly to the interconnect bays. The c3000 enclosure, on the other hand, was focused on a mid-market customer that often does not require full redundancy. With the c3000 enclosure, customers can use either a single Ethernet switch or redundant Ethernet switches in interconnect bays 1 and 2. Figure 9 gives an example of how c-Class half-height server blades connect to the interconnect bays in the c3000 enclosure. Customers should review the appropriate user guide for each enclosure. The guides are available at http://h71028.www7.hp.com/enterprise/cache/316682-0-0-0-121.html. 12