Recommended Sun Systems Ethernet Port Configuration (Auto-Negotiation or Manual Configuration)
(Doc ID 1006000.1)
Last updated on JANUARY 26, 2018
Applies to:Solaris Operating System - Version 8.0 to 10 9/10 U9 [Release 8.0 to 10.0]
Solaris Operating System - Version 9 GA and later
Using auto-negotiation is the IEEE 802.3 standard and customers are encouraged to follow the "intent" of 802.3u/z standards and implement auto-negotiation in fast Ethernet and gigabit Ethernet environments.
Oracle recommends that the practice of forcing interfaces should be avoided unless absolutely necessary. Disabling auto-negotiation has been the source of many cases involving link failures, network delays and performance problems.
Policies which dictate the disabling of auto-negotiation for historical reasons should now be discouraged.
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