Ubuntu 14.04 绑定 (balance-rr) 已关闭，但从站已启动

我正在尝试在我的 Ubuntu 14.04 服务器上设置 balance-rr。我有一个 USB 3.0 双网卡适配器（eth1 和 eth2）。它直接连接到我的 NAS。它工作正常，然后我重新启动，现在它不工作。我现在似乎无法让它工作，我看不出有什么问题。以下是我认为相关的所有文件。两个从接口似乎都工作正常，但绑定已关闭。有什么我想念的吗？谢谢！

猫 /etc/模块

lp
rtc
bonding

# Chip drivers
coretemp

猫 /etc/网络/接口

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

# eth1 configuration
auto eth1
iface eth1 inet manual
bond-master bond0

# eth2 configuration
auto eth2
iface eth2 inet manual
bond-master bond0

# Bonding eth1 & eth2 to create bond0 NIC
auto bond0
iface bond0 inet static
address 172.16.0.101
netmask 255.255.255.0
bond-mode balance-rr
bond-miimon 100
bond-slaves none

cat /proc/net/bonding/bond0

Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: load balancing (round-robin)
MII Status: down
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

须藤 ethtool bond0

Settings for bond0:
        Supported ports: [ ]
        Supported link modes:   Not reported
        Supported pause frame use: No
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Speed: Unknown!
        Duplex: Unknown! (255)
        Port: Other
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
        Link detected: no

须藤 ethtool eth1

Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 3
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pg
        Wake-on: g
        Current message level: 0x00000007 (7)
                       drv probe link
        Link detected: yes

须藤 ethtool eth2

Settings for eth1:
        Supported ports: [ TP MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 3
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pg
        Wake-on: g
        Current message level: 0x00000007 (7)
                       drv probe link
        Link detected: yes

dmesg | grep“eth1”

[    6.259558] ax88179_178a 2-4.1:1.0 eth1: register 'ax88179_178a' at usb-0000:00:14.0-4.1, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0a:cd:2b:c9:14
[    6.893683] bond0: Adding slave eth1
[   10.219344] ax88179_178a 2-4.1:1.0 eth1: ax88179_178a - Link status is: 1
[   10.220703] ax88179_178a 2-4.1:1.0 eth1: Write medium type: 0x013b
[   10.221713] ax88179_178a 2-4.1:1.0 eth1: link up, 1000Mbps, full-duplex, lpa 0xCDE1

dmesg | grep “eth2”

[    6.588030] ax88179_178a 2-4.2:1.0 eth2: register 'ax88179_178a' at usb-0000:00:14.0-4.2, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:0a:cd:2b:c9:15
[    6.894174] bond0: Adding slave eth2
[   10.603356] ax88179_178a 2-4.2:1.0 eth2: ax88179_178a - Link status is: 1
[   10.604551] ax88179_178a 2-4.2:1.0 eth2: Write medium type: 0x013b
[   10.605743] ax88179_178a 2-4.2:1.0 eth2: link up, 1000Mbps, full-duplex, lpa 0xCDE1

dmesg | grep "bond0"

[    6.664913] bond0: Setting MII monitoring interval to 100
[    6.893683] bond0: Adding slave eth1
[    6.894174] bond0: Adding slave eth2