Intel® X722 10GBase-T以太网控制器在Ubuntu Server 18.04与22.04下无法建立以太网连接的问题求助

各位大佬好，我最近碰到一个头疼的网络问题，想请教下大家：

我们用的是Supermicro的4U服务器，先后装了Ubuntu Server 22.04和18.04两个版本，尝试通过以太网线缆连接互联网，但一直失败。线缆本身没问题——已经在笔记本上测试过连通性了。插服务器上的两个LAN口时，LED会缓慢闪烁绿灯（大概5秒一次），但就是连不上网。

下面是我已经排查过的操作和结果：

1. 查看网络接口状态 #

运行ip a命令，输出显示两个网口eno1和eno2都处于<NO-CARRIER,BROADCAST,MULTICAST,UP>状态，也就是物理链路没检测到载波。手动关闭再重启这两个接口也没有改善：

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 3c:ec:ef:0f:7a:28 brd ff:ff:ff:ff:ff:ff
3: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 3c:ec:ef:0f:7a:29 brd ff:ff:ff:ff:ff:ff

2. 检查网卡参数与链路状态 #

用ethtool eno1查看网卡配置，发现Auto-negotiation是关闭状态，而且明确显示Link detected: no，速度和双工模式都显示为未知。尝试用sudo ethtool -s eno1 speed 100 duplex full强制设置速度和双工，结果报错Cannot set new settings: Invalid argument，无法修改参数：

Settings for eno1:
    Supported ports: [ ]
    Supported link modes:   1000baseT/Full
                            1000baseKX/Full
                            10000baseT/Full
                            10000baseKR/Full
    Supported pause frame use: Symmetric Receive-only
    Supports auto-negotiation: Yes
    Supported FEC modes: Not reported
    Advertised link modes:  1000baseT/Full
                            1000baseKX/Full
                            10000baseT/Full
                            10000baseKR/Full
    Advertised pause frame use: No
    Advertised auto-negotiation: Yes
    Advertised FEC modes: Not reported
    Speed: Unknown!
    Duplex: Unknown! (255)
    Port: Other
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: off
    Supports Wake-on: g
    Wake-on: g
    Current message level: 0x00000007 (7)
                   drv probe link
    Link detected: no

3. 确认网卡驱动状态 #

检查网卡驱动，运行modinfo i40e的输出显示Intel XL710的驱动已经正确加载，版本为2.1.14-k，依赖项也正常：

filename:       /lib/modules/4.15.0-156-generic/kernel/drivers/net/ethernet/intel/i40e/i40e.ko
version:        2.1.14-k
license:        GPL
description:    Intel(R) Ethernet Connection XL710 Network Driver
author:         Intel Corporation, <e1000-devel@lists.sourceforge.net>
srcversion:     304E7F43D32C80652A1A2A9
alias:          pci:v00008086d0000158Bsv*sd*bc*sc*i*
alias:          pci:v00008086d0000158Asv*sd*bc*sc*i*
alias:          pci:v00008086d00001588sv*sd*bc*sc*i*
alias:          pci:v00008086d00001587sv*sd*bc*sc*i*
alias:          pci:v00008086d000037D3sv*sd*bc*sc*i*
alias:          pci:v00008086d000037D2sv*sd*bc*sc*i*
alias:          pci:v00008086d000037D1sv*sd*bc*sc*i*
alias:          pci:v00008086d000037D0sv*sd*bc*sc*i*
alias:          pci:v00008086d000037CFsv*sd*bc*sc*i*
alias:          pci:v00008086d000037CEsv*sd*bc*sc*i*
alias:          pci:v00008086d00001589sv*sd*bc*sc*i*
alias:          pci:v00008086d00001586sv*sd*bc*sc*i*
alias:          pci:v00008086d00001585sv*sd*bc*sc*i*
alias:          pci:v00008086d00001584sv*sd*bc*sc*i*
alias:          pci:v00008086d00001583sv*sd*bc*sc*i*
alias:          pci:v00008086d00001581sv*sd*bc*sc*i*
alias:          pci:v00008086d00001580sv*sd*bc*sc*i*
alias:          pci:v00008086d00001574sv*sd*bc*sc*i*
alias:          pci:v00008086d00001572sv*sd*bc*sc*i*
depends:        ptp
retpoline:      Y
intree:         Y
name:           i40e
vermagic:       4.15.0-156-generic SMP mod_unload modversions
signat:         PKCS#7
signer:
sig_key:
sig_hashalgo:   md4
parm:           debug:Debug level (0=none,...,16=all), Debug mask (0x8XXXXXXX) (uint)

4. DHCP连接尝试 #

运行dhclient -v eno1尝试获取IP，结果显示没有收到任何DHCP OFFER，这也和链路未连通的状态一致。

另外，我查过类似的案例，有用户用同款X722网卡在Ubuntu Server 20.04下也遇到过类似的DHCP连接问题，我们的情况和该案例里的场景非常相似——都是使用DHCP分配IP，而且因为环境限制，没法随便把服务器挪到别的房间测试，也不太方便直接设置静态IP。

现在实在没头绪了，有没有大佬能给点排查方向或者解决方案？万分感谢！

备注：内容来源于stack exchange，提问作者Alexander Tkachenko