Optional Gigabit Ethernet Modules; Network Configuration Example; Providing Dedicated Links For Fast Ethernet - 3Com SuperStack II 3900 Getting Started Manual

18 C 1: S
HAPTER YSTEM AND

Optional Gigabit Ethernet Modules

The Switch 3900 back panel has two expansion slots
that can hold optional Gigabit Ethernet modules.
These modules are available in the following
configurations:
1000BASE-SX Module
Multimode fiber with paired SC connectors.
1000BASE-LX Module —
Single-mode fiber with paired SC connectors.
Multimode fiber with paired SC connectors.
For distances, see Chapter 3. For details on installing
and using the optional Gigabit Ethernet modules, see
the 1000BASE-SX/1000BASE-LX Gigabit Ethernet
Module Installation Guide that is on the
Documentation CD and shipped with each module.
S O
ETUP VERVIEW

Network Configuration Example

This section describes one way to place the
Switch 3900 in your network to alleviate traffic
congestion.

Providing Dedicated Links for Fast Ethernet

The rapid deployment of Fast Ethernet has increased
bandwidth demand many times over, not only
because it supports 100 Mbps connections on the
network but also because it places demands on the
servers to manage the traffic coming through those
connections.
Figure 4 shows how the Switch 3900 provides direct
100 Mbps links to devices on the network through its
Fast Ethernet ports and up to three dedicated Gigabit
links to your network's servers.
In this sample configuration, the Switch 3900 can
provide up to 36 clients on your network with a
dedicated 100 Mbps link and can multiplex the client
traffic for Gigabit-speed access to the servers. (You
can use one port on the Switch 3900 for in-band
management as well as for network traffic.)