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Ethernet Autonegotiation Best Practices (817-7526) (Doc ID 1328861.1)

Last updated on OCTOBER 24, 2019

Applies to:

Solaris Operating System - Version 8.0 to 10 9/10 U9 [Release 8.0 to 10.0]
Solaris Operating System - Version 8 6/00 U1 to 11.1 [Release 8.0 to 11.0]
Information in this document applies to any platform.

Purpose

"This article discusses the advantages of using Ethernet autonegotiation when
connecting Fast Ethernet (100 Mbps) and Gigabit Ethernet (1000Mbps) NICs to
network switches, routers, and hubs. It emphasizes Sun's recommendation to leave
Ethernet autonegotiation enabled (default) when connecting devices that are
compliant with IEEE 802.3 standards.

Link failures, network delays, performance problems, and network troubleshooting
difficulties can be alleviated and optimal link configuration is achieved with the
correct implementation of Ethernet autonegotiation. Using autonegotiation is the
IEEE 802.3 standard and customers are encouraged to follow the “intent” of IEEE
802.3u/z standards and implement autonegotiation in their Ethernet environments."

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps

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