DES-1218/DES-1226 10/100/1000 Mbps Ethernet Switch User’s Guide
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 1x, 2x, 3x, etc.) and an uplink (port 1x in MDI-II mode) port. If you are using a crossover cable, the connection must be made from uplink to uplink, or from a crossed port to another crossed port.
♦A 10BASE-T hub or switch can be connected to the Switch via a two-pair Category 3, 4 or 5 UTP/STP straight cable.
♦A 100BASE-TX hub or switch can be connected to the Switch via a two-pair Category 5 UTP/STP straight cable.
If the other switch or hub contains an unused uplink port, we suggest connecting the other device’s uplink (MDI-II) port to any of the switch’s (MDI-X) ports using a normal straight-through cable, as shown below.
If the other device does not have an unused uplink port, make the connection with a normal straight-through cable from the designated MDI-II port on the switch to any normal crossed port on the hub. Alternatively, if you have a crossover cable you can save the MDI-II (uplink) port for other connections and make this one from a crossed port to another crossed port.
Figure 4-2. Switch connected to a normal (non-Uplink) port on a hub or switch using a
straight or crossover cable
