Issue

ip addr show コマンドを実行すると、ethtool eth2 と ethtool eth3 には問題がないことが示されますが、
#cat /proc/net/bonding/bond1 コマンドを実行すると、eth2 と eth3 に未知のスピードとデュプレックスがあることが報告されます。

[root@localhost ~]# ip addr show

2: eth4:<BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master bond0 state UP qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
3: eth5:<BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master bond0 state UP qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
4: eth0:<BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff

8: bond0:<BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 9000 qdisc noqueue state UP 
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    inet xx:xx:xx:xx:xx:xx/23 brd  scope global bond0

[root@localhost ~]# ethtool eth2
Settings for eth2:
        Supported ports:[ TP ]
        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/Half 1000baseT/Full 
        Advertised pause frame use:Symmetric
        Advertised auto-negotiation:Yes
        Link partner advertised link modes:1000baseT/Full 
        Link partner advertised pause frame use:Transmit-only
        Link partner advertised auto-negotiation:Yes
        Speed:1000Mb/s
        Duplex:Full
        Port:Twisted Pair
        PHYAD:3
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: on
        Supports Wake-on: g
        Wake-on: g
        Current message level:0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: yes

[root@localhost ~]# ethtool eth3
Settings for eth3:
        Supported ports:[ TP ]
        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/Half 1000baseT/Full 
        Advertised pause frame use:Symmetric
        Advertised auto-negotiation:Yes
        Link partner advertised link modes:1000baseT/Full 
        Link partner advertised pause frame use:Transmit-only
        Link partner advertised auto-negotiation:Yes
        Speed:1000Mb/s
        Duplex:Full
        Port:Twisted Pair
        PHYAD:4
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: off
        Supports Wake-on: g
        Wake-on: g
        Current message level:0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: yes
[root@lrchwp2bapp004 ~]# cat /proc/net/bonding/bond1
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave:None
Currently Active Slave: eth2
MII Status: up
MII Polling Interval (ms):100
Up Delay (ms):5000
Down Delay (ms):1000

Slave Interface: eth2
MII Status: up
Speed:Unknown
Duplex:Unknown
Link Failure Count:0
Permanent HW addr: xx:xx:xx:xx:xx:xx
Slave queue ID:0

Slave Interface: eth3
MII Status: up
Speed:Unknown
Duplex:Unknown
Link Failure Count:0
Permanent HW addr: xx:xx:xx:xx:xx:xx
Slave queue ID:0
[root@hostname ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.8 (Santiago)