Avaya Configuring Ethernet, FDDI, and Token Ring Services Instrukcja Użytkownika Pobierz pdf (Strona 27)

Configuring Ethernet Services

305259-A Rev 00

2-3

The following sections describe proprietary features of Bay Networks Fast

Ethernet router services, and provide hints and notes for operation.

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

The connector you use determines the supported features of 100BASE-TX and

100BASE-FX operation (Table 2-2)

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.

Table 2-2. 100BASE-T Features

Operation Cabling Physical Interface

Automatic Line

Negotiation Full Duplex *

* The current implementation of the Ethernet standard does not address full-duplex operation or congestion control; these

are proprietary features.

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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