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Subject: Re: [Intel-wired-lan] ice: E810-XXV: Dell GBIC S28-10G-25G-SR-85C does not work X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 3/25/2026 12:02 AM, Paul Menzel wrote: > Dear Tony, dear Przemek, > > > Just a kind reminder: > > Am 18.02.26 um 16:00 schrieb Paul Menzel: > >> One more follow-up: >> >> Am 18.02.26 um 13:09 schrieb Paul Menzel: >> >>> Am 17.02.26 um 19:16 schrieb Tony Nguyen: >>> >>>> On 2/17/2026 9:15 AM, Paul Menzel wrote: >>> >>>> I spoke to one of our link people about this. >>>> >>>>> It works with Broadcom network controller BCM57414: >>>>> >>>>>      $ lspci -nn -s c4:00 >>>>>      c4:00.0 Ethernet controller [0200]: Broadcom Inc. and >>>>> subsidiaries BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet >>>>> Controller [14e4:16d7] (rev 01) >>>>>      c4:00.1 Ethernet controller [0200]: Broadcom Inc. and >>>>> subsidiaries BCM57414 NetXtreme-E 10Gb/25Gb RDMA Ethernet >>>>> Controller [14e4:16d7] (rev 01) >>>>> >>>>> The difference seems to be that the Broadcom device supports auto- >>>>> negotiation, and the Intel device does not: >>>> >>>> Strictly speaking, optical links do not provide auto-negotiation. >>>> >>>>> Intel E810-XXV: >>>>> >>>>>      Supported ports: [ FIBRE ] >>>>>      Supported link modes:   1000baseT/Full >>>>>                              10000baseT/Full >>>>>                              25000baseCR/Full >>>>>                              25000baseSR/Full >>>>>                              1000baseX/Full >>>>>                              10000baseCR/Full >>>>>                              10000baseSR/Full >>>>>                              10000baseLR/Full >>>>>      Supported pause frame use: Symmetric >>>>>      Supports auto-negotiation: No >>>>>      Supported FEC modes: None >>>>>      Advertised link modes:  25000baseSR/Full >>>> >>>> The important part is here 10G is not an advertised link mode... >>>> >>>>>      Advertised pause frame use: No >>>>>      Advertised auto-negotiation: No >>>>>      Advertised FEC modes: None >>>>>      Speed: Unknown! >>>>>      Duplex: Unknown! (255) >>>>>      Auto-negotiation: off >>>>>      Port: FIBRE >>>>>      PHYAD: 0 >>>>>      Transceiver: internal >>>>>      Supports Wake-on: d >>>>>      Wake-on: d >>>>>          Current message level: 0x00000007 (7) >>>>>                                 drv probe link >>>>>      Link detected: no >>>>> >>>>> Broadcom BCM57414 NetXtreme-E: >>>>> >>>>>      Supported ports: [ FIBRE ] >>>>>      Supported link modes:   25000baseSR/Full >>>>>                              10000baseSR/Full >>>>>      Supported pause frame use: Symmetric Receive-only >>>>>      Supports auto-negotiation: Yes >>>>>      Supported FEC modes: RS     BASER >>>>>      Advertised link modes:  25000baseSR/Full >>>>>                              10000baseSR/Full >>>> >>>> ... where it is here. >>>> >>>>>      Advertised pause frame use: No >>>>>      Advertised auto-negotiation: Yes >>>>>      Advertised FEC modes: Not reported >>>>>      Speed: Unknown! >>>>>      Duplex: Unknown! (255) >>>>>      Auto-negotiation: on >>>>>      Port: FIBRE >>>>>      PHYAD: 1 >>>>>      Transceiver: internal >>>>>      Supports Wake-on: g >>>>>      Wake-on: d >>>>>          Current message level: 0x00002081 (8321) >>>>>                                 drv tx_err hw >>>>>      Link detected: no >>> >>>>>> PS: >>>>>> >>>>>> ``` >>>>>> $ ip link show net04 >>>>>> 7: net04: mtu 1500 qdisc mq >>>>>> switchid b48351ffff278d44 state DOWN mode DEFAULT group default >>>>>> qlen 1000 >>>>>>      link/ether b4:83:51:27:8d:44 brd ff:ff:ff:ff:ff:ff >>>>>>      alias eth4 >>>>>> $ sudo ethtool -m net04 >>>>>>      Identifier                                : 0x03 (SFP) >>>>>>      Extended identifier                       : 0x04 (GBIC/SFP >>>>>> defined by 2-wire interface ID) >>>>>>      Connector                                 : 0x07 (LC) >>>>>>      Transceiver codes                         : 0x00 0x00 0x00 >>>>>> 0x00 0x00 0x00 0x00 0x00 0x02 >>>> >>>> 0x10 would be here for advertised 10G support. It is not, which is >>>> why it's not being advertised. He mentioned it's very common for >>>> dual rates to claim it on paper but not advertise it properly. >>> >>> Thank you for looking into this. It should work in this case, as it >>> works with the Broadcom device. >>> >>>> Could you provide the output for 'ethool -m hex on'? >>> >>> Sure. Please find it attached for the Intel and Broadcom device. It’s >>> the same GBIC model and only the serial number should differ. >> >> The Dell support pointed to the section *Known Issues* in the release >> notes of the Intel network controller firmware version 24.0.5 [1]: >> >>>    - When using the dual rate 10G/25G SR optics module (DN# M14MK), >>> linking at 10G may not be >>>      possible if auto negotiation is enabled. To workaround this >>> issue, disable Auto Negotiation >>>      on the switch interface. On the adapter side: >>>       - To obtain 10Gps link on pre-OS environment, set Media >>> Detection to Disabled in Main >>>         Configuration Page and in NIC Configuration, uncheck the box >>> labeled 25G and make sure >>>         the box for 10G is checked, this will force the link speed to >>> 10Gps. >>>       - To obtain 10Gps link on OS, you will need to manually set the >>> speed to 10Gps. For example, >>>         use "ethtool -s INTERFACE advertise 0x80000000000" on Linux. >> >> (I am unclear to what component “if auto negotiation is enabled” >> refers to.) >> >> Anyway, without changing anything on the switch, running the suggested >> command >> >>      sudo ethtool -s p3p2 advertise 0x80000000000 >> >> get the link up: >> >>      ice 0000:81:00.1 p3p2: NIC Link is up 10 Gbps Full Duplex, >> Requested FEC: RS-FEC, Negotiated FEC: NONE, Autoneg Advertised: Off, >> Autoneg Negotiated: False, Flow Control: None >> >> Does the Linux kernel need a quirk to work around the broken firmware? >> (Which hopefully will still be fixed in future releases.) The firmware works correctly as it is implemented against spec; the module itself does not as it's not correctly advertising its supported speeds. > Were you able to talk to your firmware engineers, if it could be improved? That being said, there are firmware changes coming that will work around this module's issues. I don't know when that will be released though. Thanks, Tony > Kind regards, > > Paul > > >>> PS: For completeness: >>> >>>      $ ethtool -i net04 >>>      driver: ice >>>      version: 6.12.0-160000.5-default >>>      firmware-version: 4.80 0x800206a0 24.0.5 >>>      expansion-rom-version: >>>      bus-info: 0000:81:00.1 >>>      supports-statistics: yes >>>      supports-test: yes >>>      supports-eeprom-access: yes >>>      supports-register-dump: yes >>>      supports-priv-flags: yes >> >> >> [1]: https://dl.dell.com/FOLDER13423820M/2/ >> fw_release_e810_e823-20250910.txt >>      "Intel(R) E810 Adapter and E823 LOM Firmware Release Notes for >> Version 24.0.5" >