MXS924 Users Guide
–
Dolphin Interconnect Solutions
Page 4
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Terms and Acronyms
Important terms and acronyms used in this manual
AOC
A
ctive
O
ptical
C
able. Special PCIe fiber cable assembly with SFF-8644 connectors.
CMI
C
able
M
anagement
I
nterface. The 2-wire management interface for communication between
subsystems connected by a PCIe 3.0 cable. Details can be found in the PCI-SIG External Cabling
Specification 3.0. The CMI functionality is optional with the MXS924 switch.
BMC Controller Board Management Controller (Microcontroller) on the MXS924 used to manage and implement the CMI
communications and switch management functions. CMI communication require PCIe 3.0 / 4.0 cables.
eXpressWare
Dolphins software stack for PCIe clustering and IO.
Lane
One PCI Express Lane contains a differential pair for transmission and a differential pair for reception.
Link
A collection of PCI Express Lanes providing the communication path between an Upstream and
Downstream Port. The MXS924 support links of x4, x8 or x16 width by utilizing lanes from 1,2 or 4 ports.
MiniSAS-HD
Standard MiniSAS-HD cable with SFF-8644 connectors.
PCIe 3.0 cable
PCIe 3.0 cable with SFF-8644 connectors. Complaint to the new PCI-SIG External Cabling Specification
3.0. Support for CMI.
PCIe 4.0 cable
PCIe 4.0 cable with SFF-8644 connectors. Complaint to the new PCI-SIG External Cabling Specification
4.0. (draft) Support for CMI.
Chassis Ports
The MXS924 has 24 x4 Gen3 SFF-8644 ports, named P1, P2, P
3 …,
P24. The port numbers are printed on
the chassis panel below the connectors.
Fabric Port
MXS924 ports configured to be used as a link to another MXS924 switch. For standard dual switch
configurations, Chassis Ports P1, P2, P3 and P4 are normally the fabric ports.
