Have you had a chance to look over the udev logical devices for the adapters? Since both adapters are set to two different networks, have you check the route to communicate?
On Wed, Aug 14, 2013 at 9:16 AM, Edison, Arul (GE Healthcare) < aruljeyananth.jamesedi...@ge.com> 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**** > > ** ** >
