Chapter 3: Ethernet Module Fundamentals; Ethernet Module Concepts - Avaya Virtual Services Platform 9000 Series Configuration Manual

Chapter 3: Ethernet module fundamentals

Use the information in this section to understand Ethernet configuration concepts.
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Ethernet module concepts

• Ethernet module features
Ethernet module concepts
Extending Ethernet over local, metropolitan, and wide area networks provides cost-effective
solutions for data transmission and ensures end-to-end Ethernet connectivity. To optimize
Ethernet communications, you can configure a number of parameters. The following sections
provide information you can use to configure Ethernet modules for optimal performance.
• Port speed and duplex mode
• Autonegotiation
• Remote Fault Indication and Far End Fault Indication
• Custom Autonegotiation Advertisement
• 802.3x flow control for Gigabit Ethernet
• Maximum transmission unit and jumbo frames
• MLT and Link Aggregation Control Protocol groups port speed
• Virtual Router Forwarding for Ethernet modules
Port speed and duplex mode
The Avaya Virtual Services Platform 9000 Ethernet modules support various data rates; these
include 10 Mbit/s, 100 Mbit/s, 1000 Mbit/s, and 10 Gbit/s. Some modules support several data
rates and use Autonegotiation to determine the appropriate data rate.
The duplex mode determines the direction of traffic flow during data communication. Half-
duplex indicates that communication occurs between two Ethernet devices in both directions,
but only in one direction at a time. Full-duplex indicates that communication occurs in both
directions simultaneously. If you do not use Autonegotiation, ensure that you set both
interconnected Ethernet devices to the same mode.
Some modules must use full-duplex; on those modules, you cannot change this parameter.
Autonegotiation
Use Autonegotiation to allow the device to automatically negotiate the best common data rate
and duplex mode to use between two Autonegotiation-capable Ethernet devices.
Autonegotiation automatically configures devices that share a link segment to take maximum
advantage of their abilities. You can use Autonegotiation to advertise abilities of devices at
Configuration — Ethernet Modules
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