Chapter 3: Installation; Overview; Pre-Installation Considerations; Fast Ethernet Considerations - Cisco Gigabit Smart Switch with Resilient Clustering Technology and PoE SLM224G4PS User Manual

Chapter 3
Chapter 3:
Installation

Overview

This chapter will explain how to connect network devices
to the Switch. The following diagram shows a typical
network configuration.
Cable/DSL
Internet Modem Router Wireless Access Point
10/100/1000
Desktop
Typical Network Configuration for the SLM248G4PS
When you connect your network devices, make sure you
do not exceed the maximum cabling distances, which are
listed in the following table:
Maximum Cabling Distances
From To
Switch Switch or Hub
Hub† Hub
Switch or Hub† Computer
A hub refers to any type of 100 Mbps hub. A 10 Mbps hub connected
†
to another 10 Mbps hub can span up to 100 meters (328 feet).
24/48-Port 10/100 + 4-Port Gigabit Smart Switch with Resilient Clustering Technology and PoE
Uplink via Fiber to
Server Switch
10/100
Notebook
Maximum Distance
100 meters (328 feet)
5 meters (16.4 feet)
100 meters (328 feet)

Pre-Installation Considerations

Fast Ethernet Considerations

If you are using the Switch for Fast Ethernet (100 Mbps)
applications, you must observe the following guidelines:

Full-Duplex Considerations

The Switch provides full-duplex support for its RJ-45
ports. Full-duplex operation allows data to be sent and
received simultaneously, doubling a port's potential data
throughput. If you will be using the Switch in full-duplex
mode, the maximum cable length using Category 5 cable
is 328 feet (100 meters).

1000BASE-T Cable Requirements

All Category 5 UTP cables that are used for 100BASE-TX
connections should also work for 1000BASE-T, providing
that all four wire pairs are connected. However, it is
recommended that for all critical connections, or any
new cable installations, Category 5e (enhanced Category
5) or Category 6 cable should be used. The Category
5e specification includes test parameters that are only
recommendations for Category 5. Therefore, the first
step in preparing existing Category 5 cabling for running
1000BASE-T is a simple test of the cable installation to be
sure that it complies with the IEEE 802.3ab standards.

Positioning the Switch

Before you choose a location for the Switch, observe the
following guidelines:
Make sure that the Switch is accessible and that the
•
cables can be connected easily.
Keep cabling away from sources of electrical noise,
•
power lines, and fluorescent lighting fixtures.
Position the Switch away from water and moisture
•
sources.
To ensure adequate air flow around the Switch, be
•
sure to provide a minimum clearance of two inches
(50 mm).
Do not stack free-standing Switches more than four
•
units high.

Placement Options

There are two ways to physically install the Switch, either
set the Switch on its four rubber feet for desktop placement
or mount the switch in a standard-sized, 19-inch wide, 1U-
high rack for rack-mount placement.
Installation
5