Chapter 11 Avaya P330 Layer 2 Features

Fast Ethernet

Fast Ethernet is a newer version of Ethernet, supporting data transfer rates of 100 Mbps. Fast Ethernet is sufficiently similar to Ethernet to support the use of most existing Ethernet applications and network management tools. Fast Ethernet is also known as 100BASE-T (over copper) or 100BASE-FX (over fiber).

Fast Ethernet is standardized as IEEE 802.3u.

Gigabit Ethernet

Gigabit Ethernet supports data rates of 1 Gbps. It is also known as 1000BASE-T (over copper) or 1000BASE-FX (over fiber).

Gigabit Ethernet is standardized as IEEE 802.3z.

Configuring Ethernet Parameters

Auto-negotiation

Auto-Negotiation is a protocol that runs between two stations, two switchs or a station and a switch. When enabled, Auto-Negotiation negotiates port speed and duplex mode by detecting the highest common denominator port connection for the endstations. For example, if one workstation supports both 10 Mbps and 100 Mbps speed ports, while the other workstation only supports 10 Mbps, then Auto- Negotiation sets the port speed to 10 Mbps.

For Gigabit ports, Auto-Negotiation determines the Flow Control configuration of the port.

Full-Duplex/Half-Duplex

Devices that support Full-Duplex can transmit and receive data simultaneously, as opposed to half-duplex transmission where each device can only communicate in turn.

Full-Duplex provides higher throughput than half-duplex.

Speed

The IEEE defines three standard speeds for Ethernet: 10, 100 and 1000 Mbps (also known as Ethernet, Fast Ethernet and Gigabit Ethernet respectively).

54

Avaya P332G-ML User’s Guide

Page 68
Image 68
Avaya P332G-ML manual Configuring Ethernet Parameters