Line Cards; Cooling System - Dell PowerConnect J-EX8216 Hardware Manual

Dell PowerConnect J-Series J-EX8216 Ethernet Switch Hardware Guide

Line Cards

Cooling System

6
installed in the front of the chassis in the slots labeled RE0 and RE1. A redundant
configuration J-EX8216 switch has a two RE modules. See "Routing Engine (RE) Module
in a J-EX8216 Switch" on page 26 and "J-EX8216 Switch Configurations" on page 7.
The Switch Fabric (SF) modules provide the switching functionality to a J-EX8216 switch.
The SF modules are hot-insertable and hot-removable field-replaceable units (FRUs).
All eight SF modules are installed in the rear of the chassis in the slots labeled SF7 through
SF0. In a J-EX8216 switch, all eight SF modules are active and must be installed in the
switch for normal operation. If a single SF module fails, the input/output traffic for that
module is load-balanced among the remaining SF modules, providing graceful degradation
in midplane performance.
The impact of an SF module failure on the performance of a J-EX8216 switch varies based
on the type of line cards installed in the switch and the traffic mix flowing through them.
In a J-EX8216 switch configuration that is fully loaded with 8-port 10-Gigabit Ethernet
SFP+ line cards, if one SF module fails, the remaining seven SF modules still have sufficient
switching capacity to maintain continuous switch operation at full wire-rate performance.
See "Switch Fabric (SF) Modules in a J-EX8216 Switch" on page 29.
The J-EX8216 switch features 16 horizontal line card slots and supports wire-rate
performance for all packet sizes for the installed line cards. The line cards in J-EX8200
switches combine a Packet Forwarding Engine and Ethernet interfaces on a single
assembly. They are field-replaceable units (FRUs), and you can install them in the slots
labeled 0 through 15 on the front of the switch chassis. All line cards are hot-insertable
and hot-removable.
The following line cards are available for J-EX8216 switches:
8-port 10-Gigabit Ethernet SFP+ line card: This line card has eight 10-gigabit SFP+
ports on its faceplate in which you can install SFP+ transceivers. See "8-port SFP+
Line Card in a J-EX8200 Switch" on page 32.
48-port 100/1000 SFP line card: This line card has 48 1-gigabit SFP ports on its
faceplate in which you can install SFP transceivers. See "48-port SFP Line Card in a
J-EX8200 Switch" on page 33.
48-port 10/100/1000 RJ-45 line card: This line card has 48 10/100/1000 Gigabit
Ethernet ports with RJ-45 connectors on its faceplate. See "48-port RJ-45 Line Card
in a J-EX8200 Switch" on page 34.
The cooling system in a J-EX8216 switch consists of two hot-insertable and
hot-removable, field-replaceable unit (FRU) fan trays. Each fan tray contains nine fans.
Both fan trays install vertically on the left front of the chassis and provide side-to-side
chassis cooling and front-to-side cooling. The top and bottom fan trays are identical and
interchangeable. However, only the top fan tray cools the SF modules installed in the
rear of the chassis. See "Cooling System and Airflow in a J-EX8216 Switch" on page 44.