Unable to bring up eth1 (SFP LAN)

Software

openwrt-imagebuilder-24.10.0-rc2-mediatek-filogic.Linux-x86_64
Linux OpenWrt 6.6.63 #0 SMP Tue Dec  3 11:41:08 2024 aarch64 GNU/Linux

I bought the board with the official SFP modules (one of them being SFP-10G-BX20-D)

I was able to use the module to connect R4 with a switch using eth2 (SFP WAN) but when it comes to the eth1 port the interface just refuses to go up.

ethtool reports successful link detection and TX/RX power and I was able to tcpdump on eth1 and see broadcasting packets

root@OpenWrt:~# [  172.894786] sfp sfp2: module removed
[  175.103241] sfp sfp2: module OEM              SFP-10G-BX20-D   rev 1.0  sn 2406180043       dc 240619  
[  175.143105] hwmon hwmon2: temp1_input not attached to any thermal zone
ethtool eth1
Settings for eth1:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseLR/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10000baseLR/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 10000Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: FIBRE
        PHYAD: 0
        Transceiver: internal
        Current message level: 0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: no
root@OpenWrt:~# ip link set eth1 down
[  573.714202] br-lan: port 4(eth1) entered disabled state
root@OpenWrt:~# ip link set eth1 up
[  576.053682] mtk_soc_eth 15100000.ethernet eth1: configuring for inband/10gbase-r link mode
root@OpenWrt:~# ip link show eth1
3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq master br-lan state DOWN mode DEFAULT group default qlen 1000
    link/ether ca:70:a3:b5:cc:48 brd ff:ff:ff:ff:ff:ff

This looks suspiciously like the problem I had, see A new dual 10G router based on Filogic 880 (Banana Pi BPi-R4) - #807 by buz - Hardware Questions and Recommendations - OpenWrt Forum for my solution

thanks, I think I also tried something similar to yours

I didn’t have issue with the SFP WAN or br-wan so I tried force_link=1 on the br-lan interface but no luck