「Device eth0 has different MAC address than expected, ignoring.」問題

在使用VMware Workstation Pro的克隆虛擬機遇到問題「Device eth0 has different MAC address than expected, ignoring.」 系統：CentOS7

service network restart //重啓網絡服務

Restarting network (via systemctl):  Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.                                                [FAILED]

發現異常了，查看一下日誌

cat /var/log/messages //查看日誌

Jun 18 12:04:54 localhost network: Bringing up interface Wired_connection_1:  ERROR    : [/etc/sysconfig/network-scripts/ifup-eth] Device  has different MAC address than expected, ignoring.
Jun 18 12:04:54 localhost /etc/sysconfig/network-scripts/ifup-eth: Device  has different MAC address than expected, ignoring
Jun 18 12:04:54 localhost network: [FAILED]
Jun 18 12:04:54 localhost network: Bringing up interface eth0:  RTNETLINK answers: File exists
Jun 18 12:05:06 localhost PackageKit: uid 0 is trying to obtain org.freedesktop.packagekit.system-sources-refresh auth (only_trusted:0)
Jun 18 12:05:06 localhost PackageKit: uid 0 obtained auth for org.freedesktop.packagekit.system-sources-refresh
Jun 18 12:05:07 localhost kernel: TCP: lp registered
Jun 18 12:05:15 localhost network: [  OK  ]
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost network: RTNETLINK answers: File exists
Jun 18 12:05:15 localhost systemd: network.service: control process exited, code=exited status=1
Jun 18 12:05:15 localhost systemd: Failed to start LSB: Bring up/down networking.
Jun 18 12:05:15 localhost systemd: Unit network.service entered failed state.
Jun 18 12:05:15 localhost systemd: network.service failed.

發現第二行有mac地址有問題

vi /etc/sysconfig/network-scripts/ifup-eth  //查看一下這個腳本
### 找出黃色部分Device has different MAC address than expected
> if [ -n "${HWADDR}" ]; then
    FOUNDMACADDR=$(get_hwaddr ${REALDEVICE})
    if [ "${FOUNDMACADDR}" != "${HWADDR}" -a "${FOUNDMACADDR}" != "${MACADDR}" ]; then
            net_log $"Device ${DEVICE} has different MAC address than expected, ignoring."
            exit 1
    fi
fi

發現這個是判斷MAC地址的一個語句 打印一下要判斷的語句爲何MAC不等於，修改一下

if [ -n "${HWADDR}" ]; then
    FOUNDMACADDR=$(get_hwaddr ${REALDEVICE})
    if [ "${FOUNDMACADDR}" != "${HWADDR}" -a "${FOUNDMACADDR}" != "${MACADDR}" ]; then
            net_log $"Device ${DEVICE} has different MAC address than expected, ignoring."
            net_log $"==============start======================="
            net_log $"!!!!${FOUNDMACADDR}" != "${HWADDR}" -a "${FOUNDMACADDR}" != "${MACADDR}!!!!!"
            net_log $"start.FOUNDMACADDR=${FOUNDMACADDR} - HWADDR=${HWADDR}  -  MACADDR=${MACADDR}.end"
            net_log $"===============ent========================"
            exit 1
    fi
fi

service network restart //重啓網絡服務 cat /var/log/messages //查看日誌

start.FOUNDMACADDR=00:00:00:00:00:00#01200:50:56:25:F1:F1#01252:54:00:C6:E8:77#01252:54:00:C6:E8:77 - ==HWADDR=00:0C:29:EB: D7:BF==  -  MACADDR=.end

發現這個讀取的HWADDR和我修改的/etc/sysconfig/network-scripts/ifcfg-eth0 配置的不同，並且和克隆機的MAC竟然是同樣不太理解，網上都是說改了這個ifcfg-eth0這個配置文件得MAC地址就行了，我改了一直報錯，因此我測試把HWADDR=00:0C:29:EB: D7:BF這個讀取的MAC改爲ifcfg-etho的MAC地址試試

ifcfg-eth0

MACADDR=0:0c:29:eb:d7:bf
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=eth0
DEVICE=eth0
ONBOOT=yes
DNS1=8.8.8.8
IPADDR=192.168.1.109
PREFIX=24
GATEWAY=192.168.1.1
NM_CONTROLLED=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_PRIVACY=no

###虛擬機關閉 設置網絡適配器（本人用的是橋接模式）-高級-MAC地址改爲0:0c:29:eb:d7:bf 重啓

service network restart //重啓網絡服務

[root[@localhost](https://my.oschina.net/u/570656) network-scripts]# service network restart
Restarting network (via systemctl):                        [  OK  ]

可是這樣是有問題的，你2個虛擬機使用同一個mac地址，啓動時第二臺的網絡是有問題的因此問題所在應該是${HWADDR}這個MAC地址的讀取問題，我剛開始是認爲這個讀取應該是在ifcfg-eth0因此在文件中修改HWADDR=MAC地址，可是仍是無效（還在繼續研究中）。剛學習不太理解，歡迎網友提供更好的方案，謝謝。