System Configurations
20
Product Description
Product/Module
Name
P/N
sLB-4018 18-Port QDR Line Board
sLB-4018
VLT-30043
sMB-CM Chassis Management Board
sMB-CM
VLT-30044
sPSU-S 1.4KW AC Power Supply Module
sPSU-S
VLT-30046
sFU-40H Horizontal Fan Unit
sFU-40H
VLT-30047-F
sFU-40V Vertical Fan Unit
sFU-40V
VLT-30048-F
The above parts can be ordered separately. The following table provides the list of additional
spare parts and accessories.
Table 4: Spare Parts and Accessories
Description
Comment
P/N
Cable Management Right
Delivered with the
switch
KIT-00023
Cable Management Left
KIT-00024
Cabling guide bracket kit for HyperScale Fabric Board. It
includes the following parts:
2 x 19" Long bracket (MEC-00576)
Cable management for Spine in 648 configuration
(MEC-00593)
Screws for assembly (380J30011)
Set must be ordered per
chassis
KIT-00022
2.3
Switch Internal Topology
High performance computing clusters typically utilize Clos networks, sometimes referred to
as "Fat Tree" or Constant Bisectional Bandwidth (CBB) networks, to construct large node
count non-blocking configurations. A Clos network is a switch topology in which integrated
non-blocking switch chips (crossbars) with a relatively low number of ports are used to build a
non-blocking switch topology supporting a much larger number of endpoints.
The Grid Director 4700 features an internal Clos network with Line Boards as the edge (leaf)
switches and Fabric Boards as the core (spine) switches. Each Line Board switch chip is
connected to each switch chip on the Fabric Boards through one or more InfiniBand
connections.
The path from one external port to another node may require three switch hops:
Hop 1 at a Line Board
Hop 2 at a Fabric Board
Hop 3 at another Line Board.
2.3.1
HyperScale Fabric Boards
HyperScale™ is an interconnect technology, enabling large scale fabrics at reduced latency,
cost and complexity. Mellanox HyperScale fabric cards have double the capacity of standard
fabric cards, as well as external (12x) ports. This combination enables new, modular
configurations that allow scaling to large fabric sizes with the minimum amount of ports and
