网络接口无法启用

[leibnewton]

    将本项目的100g版本编译后，将bit文件下载到板卡并热重启，加载mqnic.ko模块后能看到有两个网卡设备了。
    现已用DAC连接线连接vu13p网口和另一个Intel 100g网卡的网口，指示灯已亮。启用Intel 100g网口设备也成功。但在启用vu13p网口时，却没有效果，而且ethtool返回的信息也很简略。请问是什么原因呢？
    下方是执行的命令和结果：

root@caas-a149:~# lspci | grep -i eth
09:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 Gigabit Ethernet PCIe
09:00.1 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 Gigabit Ethernet PCIe
41:00.0 Ethernet controller: Device 1234:1001
c2:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
c2:00.1 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
root@caas-a149:~# ethtool enp65s0
Settings for enp65s0:
        Link detected: no
root@caas-a149:~# ip link show enp65s0
7: enp65s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether f6:a7:af:46:10:34 brd ff:ff:ff:ff:ff:ff
root@caas-a149:~# ip link set enp65s0 up
root@caas-a149:~# ip link show enp65s0
7: enp65s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether f6:a7:af:46:10:34 brd ff:ff:ff:ff:ff:ff