Unable to switch from rj45 to sfp onboard NIC

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Apr 18, 2021
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sebasr.com
I have proxmox 8.4.1 installed on a MINISFORUM MS-01.
The server has 4 NICs:
2.5Gbps RJ45 LAN ×2 (enp87s0 and enp88s0)
10Gbps SFP+ LAN ×2 (enp2s0f0np0 and enp2s0f1np1)

I installed proxmox through the RJ45 port as I was waiting for my DAC cable, and all was good.
I'm trying now to switch to the SFP+ port, but failing: when both rj45 and sfp DAC are connected, i can connect from either of the static IPs of the 2 NICs.
Once I unplug the RJ45, I cannot connect through the SFP+ address. I'm a bit lost as to why I can't connect through the SFP+ port.

Here is my /etc/network/interfaces file:


Code:
auto lo
iface lo inet loopback

iface enp87s0 inet manual

iface enp88s0 inet manual

iface enp2s0f0np0 inet manual

iface enp2s0f1np1 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.1.99/24
        gateway 192.168.1.1
        bridge-ports enp2s0f1np1
        bridge-stp off
        bridge-fd 0

iface wlp89s0 inet manual

auto vmbr1
iface vmbr1 inet static
        address 192.168.1.98/24
        bridge-ports enp88s0
        bridge-stp off
        bridge-fd 0

auto vmbr2
iface vmbr2 inet static
        address 192.168.1.97/24
        bridge-ports enp2s0f0np0
        bridge-stp off
        bridge-fd 0

auto vmbr3
iface vmbr3 inet static
        address 192.168.1.96/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0

source /etc/network/interfaces.d/*


Details of the SFP+ card:
Code:
root@edge:~#ethtool enp2s0f1np1
Settings for enp2s0f1np1:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  10000baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 10000Mb/s
        Duplex: Full
        Auto-negotiation: off
        Port: Direct Attach Copper
        PHYAD: 0
        Transceiver: internal
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes
 
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