Oracle Linux: Link Speed of Ethernet Interface is Changed from 1Gbps to 100Mbps with out configuration changes
Last updated on AUGUST 11, 2016
Applies to:Linux OS - Version Oracle Linux 5.0 and later
Information in this document applies to any platform.
A NIC, which was linked up as 1Gbps with auto-negotiation at the OS boot time, is suddenly changed to be 100Mbps without any operations. This would be happen not only with link speed, but also with others like duplex etc.
For example, /var/log/messages shows:
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