Users Guide

Hardware Overview 111
The front-panel switch ports have the following characteristics:
• The switch automatically detects the difference between crossed and
straight-through cables on RJ-45 ports and automatically chooses the MDI
or MDIX configuration to match the other end.
• SFP+ ports support Dell EMC-qualified transceivers utilizing 10GBASE-
SR, 10GBASE-LR, 10GBASE-CR, or 1000BASE-X technologies. The
default behavior is to log a message and generate an SNMP trap on
insertion or removal of an optic that is not qualified by Dell EMC. The
message and trap can be suppressed by using the service unsupported-
transceiver command.
• RJ-45 front-panel ports support full- or half-duplex mode 10/100/1000
Mbps speeds on standard Category 5 UTP cable. 1000BASE-X and
1000BASE-T operation requires the use of auto-negotiation.
• SFP+ ports support SFP+ transceivers and SFP+ copper twin-ax
technology operating at 10G or 1G speeds in full-duplex mode. SFP
transceivers are supported in SFP+ ports and operate at 1G full-duplex.
SFP transceivers require auto-negotiation to be enabled.
SFP+ ports may be configured to support 16 GB stacking over Ethernet
cables. These ports may be configured to support stacking in pairs, e.g.,
Te1/0/1 and Te1/0/2 may be configured to support stacking, or Te1/0/3 and
Te1/0/4 may be configured to support stacking, or all four ports may be
configured to support stacking.
• The Dell EMC Networking N1524P/N1548P front-panel ports support
PoE (15.4W) and PoE+ (34.2W) as well as legacy capacitive detection for
pre-standard powered devices (PDs).
Console Port
The console port provides serial communication capabilities, which allows
communication using the RS-232 protocol. The serial port provides a direct
connection to the switch and allows access to the CLI from a console
terminal connected to the port through the provided serial cable (with RJ45
YOST to female DB-9 connectors).
The console port is separately configurable and can be run as an asynchronous
link from 1200 BAUD to 115,200 BAUD. The Dell CLI supports changing the
speed only. The defaults are 9600 BAUD, 8 data bits, no parity, 1 stop bit, and
no flow control.