[CentOS-es] Probelma con 2 tarjeta de red en CentOS6.3

Mie Mar 20 08:24:49 UTC 2013

Buenos días. 

Tengo un problema que nunca me había pasado y con el que llevo un tiempo bloqueado. 

En un sistema (virtualizado con VMWare) CentOS6.3 tengo 1 tarjeta de red funcionando correctamente. Ahora necesito añadirle una segunda tarjeta de red. La tarjeta se instala correctamente según los registros que quedan en messages . La puedo configurar sin problemas desde system-config-network-tui . Cuando la activo con ifup ethX no me da ningún problema ni veo entradas en los logs que indiquen error, pero a los pocos segundos (2-3 seg) se pierde la conexión con la otra IP. Si hago un ifdown ethX y reinicio network vuelve a funcionar todo correctamente. De hw no parece ya que he probado con tarjetas diferentes y el comportamiento es el mismo. Las vmtools están actualizadas. 

Este es un tail del messages cuando he activado-desactivado-reiniciado y los ficheros de configuración de las tarjetas. La que está operativa es la eth1 y la que no me deja configurar es la eth3 

[root en lorentz log]# tail -n 40 messages 
Mar 20 07:55:11 lorentz ntpd[1765]: Listening on interface #15 eth3, 10.1.10.68#123 Enabled 
Mar 20 07:55:28 lorentz ntpd[1765]: Deleting interface #14 eth3, fe80::250:56ff:fe8a:45de#123, interface stats: received=0, sent=0, dropped=0, active_time=17 secs 
Mar 20 07:55:28 lorentz ntpd[1765]: Deleting interface #15 eth3, 10.1.10.68#123, interface stats: received=0, sent=0, dropped=0, active_time=17 secs 
Mar 20 07:58:48 lorentz ntpd[1765]: synchronized to 10.1.2.54, stratum 3 
Mar 20 08:00:22 lorentz ntpd[1765]: time reset -34.361615 s 
Mar 20 08:09:26 lorentz system-config-network[4381]: chmod 0644 //etc/sysconfig/networking/devices/ifcfg-eth1 
Mar 20 08:09:26 lorentz system-config-network[4381]: chmod 0644 //etc/sysconfig/networking/devices/ifcfg-eth3 
Mar 20 08:09:46 lorentz ntpd[1765]: synchronized to 10.1.2.54, stratum 3 
Mar 20 09:16:39 lorentz system-config-network[4594]: chmod 0644 //etc/sysconfig/networking/devices/ifcfg-eth1 
Mar 20 09:16:39 lorentz system-config-network[4594]: chmod 0644 //etc/sysconfig/networking/devices/ifcfg-eth3 
Mar 20 09:17:07 lorentz kernel: lo: Disabled Privacy Extensions 
Mar 20 09:17:07 lorentz kernel: e1000: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None 
Mar 20 09:17:07 lorentz kernel: ADDRCONF(NETDEV_UP): eth1: link is not ready 
Mar 20 09:17:07 lorentz kernel: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready 
Mar 20 09:17:08 lorentz kernel: eth3: intr type 3, mode 0, 2 vectors allocated 
Mar 20 09:17:08 lorentz kernel: eth3: NIC Link is Up 10000 Mbps 
Mar 20 09:17:09 lorentz NET[4971]: /etc/sysconfig/network-scripts/ifup-post : updated /etc/resolv.conf 
Mar 20 09:17:12 lorentz ntpd[1765]: Listening on interface #16 eth3, fe80::250:56ff:fe8a:45de#123 Enabled 
Mar 20 09:17:12 lorentz ntpd[1765]: Listening on interface #17 eth3, 10.1.10.68#123 Enabled 
Mar 20 09:17:47 lorentz NET[5040]: /etc/sysconfig/network-scripts/ifdown-post : updated /etc/resolv.conf 
Mar 20 09:17:49 lorentz ntpd[1765]: Deleting interface #16 eth3, fe80::250:56ff:fe8a:45de#123, interface stats: received=0, sent=0, dropped=0, active_time=37 secs 
Mar 20 09:17:49 lorentz ntpd[1765]: Deleting interface #17 eth3, 10.1.10.68#123, interface stats: received=0, sent=0, dropped=0, active_time=37 secs 
Mar 20 09:18:12 lorentz kernel: lo: Disabled Privacy Extensions 
Mar 20 09:18:12 lorentz kernel: e1000: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None 
Mar 20 09:18:12 lorentz kernel: ADDRCONF(NETDEV_UP): eth1: link is not ready 
Mar 20 09:18:12 lorentz kernel: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready 
Mar 20 09:18:14 lorentz kernel: eth3: intr type 3, mode 0, 2 vectors allocated 
Mar 20 09:18:14 lorentz kernel: eth3: NIC Link is Up 10000 Mbps 
Mar 20 09:18:15 lorentz NET[5416]: /etc/sysconfig/network-scripts/ifup-post : updated /etc/resolv.conf 
Mar 20 09:18:17 lorentz ntpd[1765]: Listening on interface #18 eth3, fe80::250:56ff:fe8a:45de#123 Enabled 
Mar 20 09:18:17 lorentz ntpd[1765]: Listening on interface #19 eth3, 10.1.10.68#123 Enabled 
Mar 20 09:18:20 lorentz NET[5484]: /etc/sysconfig/network-scripts/ifdown-post : updated /etc/resolv.conf 
Mar 20 09:18:22 lorentz ntpd[1765]: Deleting interface #18 eth3, fe80::250:56ff:fe8a:45de#123, interface stats: received=0, sent=0, dropped=0, active_time=5 secs 
Mar 20 09:18:22 lorentz ntpd[1765]: Deleting interface #19 eth3, 10.1.10.68#123, interface stats: received=0, sent=0, dropped=0, active_time=5 secs 
Mar 20 09:18:44 lorentz kernel: lo: Disabled Privacy Extensions 
Mar 20 09:18:44 lorentz kernel: e1000: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None 
Mar 20 09:18:45 lorentz ntpd[1765]: Deleting interface #12 eth1, fe80::250:56ff:fe8a:d03c#123, interface stats: received=0, sent=0, dropped=0, active_time=5096 secs 
Mar 20 09:18:45 lorentz ntpd[1765]: Deleting interface #13 eth1, 10.20.2.24#123, interface stats: received=57, sent=57, dropped=0, active_time=5096 secs 
Mar 20 09:18:47 lorentz ntpd[1765]: Listening on interface #20 eth1, fe80::250:56ff:fe8a:d03c#123 Enabled 
Mar 20 09:18:47 lorentz ntpd[1765]: Listening on interface #21 eth1, 10.20.2.24#123 Enabled 

D EVICE= eth1 
HWADDR=00:50:56:8a:d0:3c 
NM_CONTROLLED=no 
ONBOOT=yes 
IPADDR=10.20.2.24 
BOOTPROTO=none 
NETMASK=255.255.0.0 
DNS2=10.1.2.54 
TYPE=Ethernet 
GATEWAY=10.20.1.12 
DNS1=10.20.1.12 
IPV6INIT=no 
USERCTL=no 
~ 

DNS1=10.1.1.1 
DEVICE=eth3 
BOOTPROTO=none 
TYPE=Ethernet 
HWADDR=00:50:56:8a:45:de 
NM_CONTROLLED=no 
ONBOOT=no 
IPV6INIT=no 
USERCTL=no 
IPADDR=10.1.10.68 
NETMASK=255.255.0.0 
GATEWAY=10.1.1.1 
~ 

Gracias por adelantado. 

Un saludo, 

Antonio MANOGUE 