H3c-technologies H3C MSR 20-1X Manual de usuario descargar pdf (Pagina 31)

Table 17 Attributes of Layer 3 Ethernet interfaces

Item Description

Connector type

RJ45

Interface type

MDI/MDI-X autosensing

Frame format

Ethernet_II

Ethernet_SNAP

Operating mode

10/100 Mbps autosensing

Half duplex/full duplex

NOTE:

Media dependent interface (MDI) is a typical Ethernet interface provided by network adapters, while

media-dependent interface crossover (MDIX) is an interface commonly found on a hub or LAN switch.

Ethernet cable

Electrical Ethernet interfaces usually use category-5 twisted pair cables to connect Ethernet networks, as

shown in the following figure:

Figure 20 Ethernet cable

Ethernet cables fall into the following two categories:

• Standard cable, also called straight-through cable. At both ends of a standard cable, wires are

crimped in the RJ-45 connectors in the same sequence. A straight-through cable is used to connect

a terminal device (for example, a PC or router) to a hub or LAN Switch. The cables delivered with

the router are standard cables.

• Crossover cable. At both ends of a crossover cable, wires are crimped in the RJ-45 connectors in

different sequences. A crossover cable is used to connect a terminal device (for example, PC or

router) to another terminal device. You can make crossover cables by yourself.

NOTE:

In making network cables, shielded cables are preferred for the electromagnetic compatibility sake.

Connecting the Ethernet cable

Follow these steps to connect an Ethernet cable:

Step1 Connect one end of the Ethernet cable to an Ethernet interface on the router and the other end to the peer

device. For a 10/100 Mbps Ethernet interface that supports MDI/MDIX autosensing, you can use a

straight-through cable or crossover cable to connect the interface to a hub or LAN Switch.

Step2 View the LINK LED of the Ethernet interface after power-on. If the LINK LED is ON, a link is present. If the

LINK LED is OFF, no link is present. In the latter case, check the line.

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H3c-technologies H3C MSR 20-1X Manual de usuario Pagina 31