Redhat6.2, IP address chaos (change, switch,wrong) after service network restart

Redhat 6.2, 2 Ethernet interface,2 IP addresses.

 

# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:6A:47:AA 
          inet addr:192.168.1.162  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe6a:47aa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1901 errors:0 dropped:0 overruns:0 frame:0
          TX packets:798 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:143990 (140.6 KiB)  TX bytes:78270 (76.4 KiB)

eth2      Link encap:Ethernet  HWaddr 00:50:56:37:70:21 
          inet addr:172.24.40.1  Bcast:172.24.40.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fe37:7021/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:199 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:18960 (18.5 KiB)  TX bytes:1730 (1.6 KiB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:27 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4836 (4.7 KiB)  TX bytes:4836 (4.7 KiB)

 

After the command "service network restart", eth0 get the IP address for eth2, no IP address for eth2.

 

From the message log, we can see:

 

Dec  8 23:19:48 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 8 -> 3 (reason 39)
Dec  8 23:19:48 RHEL6-64 NetworkManager[1956]: (eth0): deactivating device (reason: 39).
Dec  8 23:19:48 RHEL6-64 NetworkManager[1956]: (eth2): device state change: 8 -> 3 (reason 39)
Dec  8 23:19:48 RHEL6-64 NetworkManager[1956]: (eth2): deactivating device (reason: 39).
Dec  8 23:19:48 RHEL6-64 NET[2474]: /etc/sysconfig/network-scripts/ifdown-post : updated /etc/resolv.conf
Dec  8 23:19:49 RHEL6-64 kernel: lo: Disabled Privacy Extensions
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) starting connection 'System eth0'
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 3 -> 4 (reason 0)
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 1 of 5 (Device Prepare) started...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) starting...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 4 -> 5 (reason 0)
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) successful.
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) complete.
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 5 -> 7 (reason 0)
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 4 of 5 (IP4 Configure Get) scheduled...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 4 of 5 (IP4 Configure Get) started...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 5 of 5 (IP Configure Commit) scheduled...
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 4 of 5 (IP4 Configure Get) complete.
Dec  8 23:19:49 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 5 of 5 (IP Configure Commit) started...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 7 -> 8 (reason 0)
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Policy set 'System eth0' (eth0) as default for IPv4 routing and DNS.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) successful, device activated.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 8 -> 3 (reason 0)
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: (eth0): deactivating device (reason: 0).
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) starting connection 'System eth2'
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 3 -> 4 (reason 0)
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 1 of 5 (Device Prepare) started...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) starting...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 4 -> 5 (reason 0)
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) successful.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 2 of 5 (Device Configure) complete.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 5 -> 7 (reason 0)
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 4 of 5 (IP4 Configure Get) scheduled...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 4 of 5 (IP4 Configure Get) started...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 5 of 5 (IP Configure Commit) scheduled...
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 4 of 5 (IP4 Configure Get) complete.
Dec  8 23:19:50 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 5 of 5 (IP Configure Commit) started...
Dec  8 23:19:51 RHEL6-64 NetworkManager[1956]: (eth0): device state change: 7 -> 8 (reason 0)
Dec  8 23:19:51 RHEL6-64 NetworkManager[1956]: Activation (eth0) successful, device activated.
Dec  8 23:19:51 RHEL6-64 NetworkManager[1956]: Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete.

 

Reason:

A. Install desktop and NetworkManager

B. Edit the IP configuration via configuration file ifcfg-eth0 and ifcfg-eth2

 

Soluton:

 

Stop and disable service "NetworkManager".

 

chkconfig NetworkManager off

service NetworkManager stop

service network restart

 

 

Disadvantage:

 

Cannot edit network configuration via GUI.

 

More information:

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