Fixed Interfaces
27
Fixed Interfaces
Ethernet Interface
Ethernet interface
H3C MSR 20 Series Routers are available with fixed 100Base-TX FE interface(s) and
Ethernet modules/cards for expansion. For more information, refer to
H3C MSR
20/30/50 Series Routers Interface Card and Interface Module Manual
. The
following table describes Ethernet interface attributes.
n
MDI (Media Dependent Interface) is a typical type of Ethernet interface provided
by network adapters. MDIX is crossover media-dependent interface, which is
commonly found on a Hub or LAN switch.
Ethernet cable
Ethernet interfaces usually use category 5 twisted pair cables, as shown in the
following figure:
Figure 13
Ethernet cable
Ethernet cables fit into the following two categories:
■
Standard cable, also called straight-through cable, at both ends of which, wires
are crimped in the RJ-45 connectors in the same sequence. The cable connects
different categories of devices, such as a terminal device (PC for example) or
router to a Hub or LAN switch. The cable accompanying the router is standard
cable.
■
Crossover cable, at both ends of which, wires are crimped in the RJ-45
connectors in different sequences. The cable connects the same category of
devices, such as PC to PC or PC to router. You can make crossover cables
yourself as needed.
n
In making network cables, shielded cables are preferred for electromagnetic
compatibility sake.
Table 18
Attributes of the Ethernet interface
Attribute Description
Connector RJ-45
Interface MDI/MDIX auto-sensing
Frame format
Ethernet_II
Ethernet_SNAP
Operating mode
10/100 Mbps auto-sensing
Full duplex/half duplex
