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DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
4
CONNECTING THE SWITCH
This chapter describes how to connect the DES 3326 to your Fast Ethernet network.
Switch to End Node
End nodes include PCs outfitted with a 10, 100 or 10/100 Mbps RJ-45 Ethernet/Fast Ethernet
Network Interface Card (NIC) and most routers. The RJ-45 UTP ports on NICs and most routers are
MDI-II. When using a normal straight-through cable, an MDI-II port must connect to an MDI-X port.
An end node can be connected to the Switch via a two-pair Category 3, 4, 5 UTP/STP straight cable (be
sure to use Category 5e UTP or STP cabling for 100 Mbps Fast Ethernet connections). The end node
should be connected to any of the twenty-three ports (2x - 24x) of the DES-3326 or to either of the two
100BASE-TX ports on the front-panel module that came preinstalled on the switch. Port 1x can be
used as an uplink port to connect to another switch using either a crossed or a straight-through cable.
This port is switched between MDI-X and MDI-II to accommodate either type of cable.
Figure 4-1. Switch connected to an End Node
The LED indicators for the port the end node is connected to are lit according to the capabilities of the
NIC. If LED indicators are not illuminated after making a proper connection, check the PC’s LAN card,
the cable, switch conditions, and connections.
The following LED indicator states are possible for an end node to switch connection:
1. The 100 LED indicator comes ON for a 100 Mbps and stays OFF for 10 Mbps.
2. The Link/Act LED indicator lights up upon hooking up a PC that is powered on.
Switch to Hub or Switch
These connections can be accomplished in a number of ways. The most important consideration is that
when using a normal, straight-through cable, the connection should be made between a normal
crossed port (Port 2x, 3x, etc.) and an Uplink (MDI-II) port. If you are using a crossover cable, the
connection must be made from Uplink to Uplink (port 1x on the DES-3326), or from a crossed port to
another crossed port.
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