Broadcom P411W-32P, User Manual

Broadcom

P411W-32P-UG104

7

P411W-32P PCIe 4.0 

User Guide 

NVMe Switch Adapter

Figure 2  Backplane with x4 Connectors

4.2  VPP-Based Backplanes

Broadcom requires new designs to enable UBM for backplane management. However, the adapter maintains support for 
Virtual Pin Port (VPP) backplane management for legacy implementations. If using x4 connectors on the backplane, each 
leg of the cable must connect to adjacent drives; otherwise, the LEDs might not work properly. 

For proper slot identification, cables must connect based on the desired slot enumeration. The most common backplane 
connector types are x4 or x8 SFF-8654 or SFF-8611 connectors. Each x8 connector on the adapter has an “A” side and “B” 
side. The adapter searches for the VPP target on the side to which the VPP target is connected.

?

#

#

#

#

3&&5 

.6-EX$RIVE

3&&5 

.6-EX$RIVE

3&&5 

.6-EX$RIVE

3&&5 

.6-EX$RIVE

0

0

0

0

3LOT

3LOT

3LOT

3LOT

3&&5 

.6-EX$RIVE

3&&5 

.6-EX$RIVE

3&&5 

.6-EX$RIVE

3&&5 

.6-EX$RIVE

3LOT

3LOT

3LOT

3LOT

0

0

0

0

!SIDE

"SIDE

!SIDE

"SIDE

!SIDE

"SIDE

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER

5"-&25

5"-

#ONTROLLER