On 08/14/2013 08:16 AM, Edison, Arul (GE Healthcare) wrote:
Hi ,
I am using the repacked version of Scientific Linux 6.3
My PC has a mother board , which has 2 Ethernet port
eth0 is connected to a device & IP configured for eth0 is 192.168.2.1
eth1 is connected to a hub. This is intern connected with another PC. IP
configured for eth0 is 192.168.1.20
The issue here is eth0 IP Address is now got changed to the IP address
of eth1 when the Device connected with eth0 become powered on .
With this, eth0 & eth1 has same IP address. Because of this the
application running on Scientific Linux 6.3 PC is not able to
communicate with the Device connected with eth0. I have enclosed the
/var/log/message file below for the reference
Please suggest me what is the configuration to be done for the same?
/etc/sysconfig/network-scripts/ifcfg-eth0 file from system is as below:-
*******************************************
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none
IPADDR=192.168.2.1
NETMASK=255.255.255.0
/etc/sysconfig/network-scripts/ ifcfg-eth1 file from system is as below:-
*****************************************************
DEVICE=eth1
BOOTPROTO=none
#IPADDR=192.168.1.90
IPADDR=192.168.1.20
NETMASK=255.255.255.0
When the Scientific Linux 6.3 Pc is booted , the network configuration
of the system is as below:-
************************
eth0 Link encap:Ethernet HWaddr 00:0B:AB:38:29:A6
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:16 Memory:fdbc0000-fdbe0000
eth1 Link encap:Ethernet HWaddr 00:0B:AB:38:29:A7
inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20b:abff:fe38:29a7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:381 errors:0 dropped:0 overruns:0 frame:0
TX packets:267 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:26234 (25.6 KiB) TX bytes:29696 (29.0 KiB)
Interrupt:17 Memory:fddc0000-fdde0000
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:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:240 (240.0 b) TX bytes:240 (240.0 b)
When the Device that is connected to the eth0 is powered on and booted,
the network configuration of the system changed as below:-
*****************************
eth0 Link encap:Ethernet HWaddr 00:0B:AB:38:29:A6
inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20b:abff:fe38:29a6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:240 (240.0 b) TX bytes:9814 (9.5 KiB)
Interrupt:16 Memory:fdbc0000-fdbe0000
eth1 Link encap:Ethernet HWaddr 00:0B:AB:38:29:A7
inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20b:abff:fe38:29a7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6077 errors:0 dropped:0 overruns:0 frame:0
TX packets:4412 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:427716 (417.6 KiB) TX bytes:287127 (280.3 KiB)
Interrupt:17 Memory:fddc0000-fdde0000
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:42683 errors:0 dropped:0 overruns:0 frame:0
TX packets:42683 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4447027 (4.2 MiB) TX bytes:4447027 (4.2 MiB)
/var/log/message file is as below:-
******************************
Aug 17 11:54:42 magic kernel: ttyS2: LSR safety check engaged!
Aug 17 11:54:46 magic kernel: ttyS2: LSR safety check engaged!
Aug 17 11:54:57 magic kernel: e1000e: eth0 NIC Link is Up 1000 Mbps Full
Duplex, Flow Control: None
Aug 17 11:54:57 magic kernel: ADDRCONF(NETDEV_CHANGE): eth0: link
becomes ready
Aug 17 11:54:57 magic NetworkManager[1612]: <info> (eth0): carrier now
ON (device state 2)
Aug 17 11:54:57 magic NetworkManager[1612]: <info> (eth0): device state
change: 2 -> 3 (reason 40)
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
starting connection 'eth1'
Aug 17 11:54:57 magic NetworkManager[1612]: <info> (eth0): device state
change: 3 -> 4 (reason 0)
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 1 of 5 (Device Prepare) scheduled...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 1 of 5 (Device Prepare) started...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 2 of 5 (Device Configure) scheduled...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 1 of 5 (Device Prepare) complete.
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 2 of 5 (Device Configure) starting...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> (eth0): device state
change: 4 -> 5 (reason 0)
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 2 of 5 (Device Configure) successful.
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 3 of 5 (IP Configure Start) scheduled.
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 2 of 5 (Device Configure) complete.
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 3 of 5 (IP Configure Start) started...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> (eth0): device state
change: 5 -> 7 (reason 0)
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 4 of 5 (IP4 Configure Get) scheduled...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 3 of 5 (IP Configure Start) complete.
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 4 of 5 (IP4 Configure Get) started...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 5 of 5 (IP Configure Commit) scheduled...
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 4 of 5 (IP4 Configure Get) complete.
Aug 17 11:54:57 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 5 of 5 (IP Configure Commit) started...
Aug 17 11:54:57 magic avahi-daemon[1624]: Withdrawing address record for
192.168.2.1 on eth0.
Aug 17 11:54:57 magic avahi-daemon[1624]: Leaving mDNS multicast group
on interface eth0.IPv4 with address 192.168.2.1.
Aug 17 11:54:57 magic avahi-daemon[1624]: Interface eth0.IPv4 no longer
relevant for mDNS.
Aug 17 11:54:57 magic avahi-daemon[1624]: Joining mDNS multicast group
on interface eth0.IPv4 with address 192.168.1.20.
Aug 17 11:54:57 magic avahi-daemon[1624]: New relevant interface
eth0.IPv4 for mDNS.
Aug 17 11:54:57 magic avahi-daemon[1624]: Registering new address record
for 192.168.1.20 on eth0.IPv4.
Aug 17 11:54:57 magic kernel: e1000e: eth0 NIC Link is Down
Aug 17 11:54:58 magic NetworkManager[1612]: <info> (eth0): device state
change: 7 -> 8 (reason 0)
Aug 17 11:54:58 magic NetworkManager[1612]: <info> Activation (eth0)
successful, device activated.
Aug 17 11:54:58 magic NetworkManager[1612]: <info> Activation (eth0)
Stage 5 of 5 (IP Configure Commit) complete.
Aug 17 11:54:58 magic NetworkManager[1612]: <info> (eth0): carrier now
OFF (device state 8, deferring action for 4 seconds)
Aug 17 11:54:58 magic avahi-daemon[1624]: Registering new address record
for fe80::20b:abff:fe38:29a6 on eth0.*.
Aug 17 11:55:00 magic NetworkManager[1612]: <info> (eth0): carrier now
ON (device state 8)
Aug 17 11:55:00 magic kernel: e1000e: eth0 NIC Link is Up 1000 Mbps Full
Duplex, Flow Control: None
Aug 17 11:57:39 magic kernel: device eth0 left promiscuous mode
Thanks,
Arul
Ditch NetworkManager. It causes more headaches than it is worth.
-Mark
--
Mr. Mark V. Stodola
Senior Control Systems Engineer
National Electrostatics Corp.
P.O. Box 620310
Middleton, WI 53562-0310 USA
Phone: (608) 831-7600
Fax: (608) 831-9591
