Avaya P460 Manuel D’Utilisation
Chapter 4
Avaya P460 Layer 2 Features
Ethernet
Ethernet is one of the most widely implemented LAN standards.
It uses the Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
access method to handle simultaneous demands. CSMA/CD is a multi-user
network allocation procedure in which every station can receive the transmissions
of any other station. Each station waits for the network to be idle before transmitting
and each station can detect collisions by other stations.
The first version of Ethernet supported data transfer rates of 10 Mbps, and is
therefore known as 10BASE-T.
It uses the Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
access method to handle simultaneous demands. CSMA/CD is a multi-user
network allocation procedure in which every station can receive the transmissions
of any other station. Each station waits for the network to be idle before transmitting
and each station can detect collisions by other stations.
The first version of Ethernet supported data transfer rates of 10 Mbps, and is
therefore known as 10BASE-T.
Fast Ethernet€
Fast Ethernet is a newer version of Ethernet, supporting data transfer rates of 100
Mbps. Fast Ethernet is similar enough to Ethernet to support the use of most current
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.
Mbps. Fast Ethernet is similar enough to Ethernet to support the use of most current
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.
(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 switches 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.
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.
Avaya P460 Configuration Guide
15