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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Dege , Christian Mardmoeller , Dennis Ostermann References: <20241202083352.3865373-1-nikita.yoush@cogentembedded.com> Content-Language: en-US, ru-RU From: Nikita Yushchenko In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit > Does IEEE 802.3 allow auto-negotiation to be turned off for speeds > greater than 1Gbps? Per 802.3-2022 ch, autoneg is optional: | 125.2.4.3 Auto-Negotiation, type single differential-pair media | | Auto-Negotiation (Clause 98) may be used by 2.5GBASE-T1 and | 5GBASE-T1 devices to detect the abilities (modes of operation) | supported by the device at the other end of a link segment, | determine common abilities, and configure for joint operation. | Auto-Negotiation is performed upon link startup through the use | of half-duplex differential Manchester encoding. | | The use of Clause 98 Auto-Negotiation is optional for 2.5GBASE-T1 | and 5GBASE-T1 PHYs.