Avaya Configuring Ethernet, FDDI, and Token Ring Services Manual de usuario Pagina 27

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Configuring Ethernet Services
117020-A Rev. A
2-3
100Base-T Media
Each Bay Networks 100Base-T router port provides two physical connectors for
LAN media:
Media Dependent Interface (MDI): RJ-45 connector to integral transceiver
Media Independent Interface (MII): DB-40 connector to an external
transceiver
Which connector you use determines the supported features of 100Base-TX and
100Base-FX operation (T
able 2-1).
100Base-T Packet Size
When using the 100Base-T Link Module, larger packet sizes yield better
performance than smaller packet sizes. In general, you should configure your
application to use the largest packet size possible.
*. The current implementation of the Ethernet standard does not address full-duplex operation or congestion control; these
are proprietary features.
Table 2-1. 100Base-T Features
Operation Cabling Physical Interface
Automatic Line
Negotation Full Duplex *
Congestion
Control
*
100Base-TX
(MDI)
Category 5
unshielded
twisted pair (UTP)
copper
RJ-45 connector Supported Supported Supported
100Base-FX
(MII)
Multimode
Fiber optic
DB-40 connector to
external transceiver
Not supported Supported Not supported
100Base-TX
(MII)
UTP DB-40 connector to
external transceiver
Supported Not supported Not supported
Note: To obtain the highest aggregate throughput, use only one port on a
100Base-T Link Module. Demanding high throughput from both ports
simultaneously will result in some packet loss, which may decrease the
performance of sensitive applications.
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