5 Replies Latest reply: Mar 19, 2014 12:08 PM by P.Forstmann RSS

    Too many IP addresses on RAC cluster node

    P.Forstmann

      I am using Oracle Linux 6.3 and have 2 Virtual Box virtual machines running an 11.2.0.3 RAC cluster.

       

      This is /etc/hosts on first node:

       

      [root@vmoe1 etc]# cat /etc/hosts

      127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

      ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

      #

      # Public

      192.168.56.51    vmoe1.localdomain vmoe1

      192.168.56.52    vmoe2.localdomain vmoe2

      # Private

      192.168.43.51    vmoe1-priv.localdomain  vmoe1-priv

      192.168.43.52    vmoe2-priv.localdomain  vmoe2-priv

      # Virtual

      192.168.56.61    vmoe1-vip.localdomain vmoe1-vip

      192.168.56.62    vmoe2-vip.localdomain vmoe2-vip

      #

      192.168.56.74    ol6elsa0

      #

      192.168.56.251 c11 c11.localdomain

      [root@vmoe1 etc]#

       

      IP configuration scripts are the following:

       

       

      [root@vmoe1 network-scripts]# cat ifcfg-eth0

      DEVICE="eth0"

      IPADDR=10.0.2.15

      HWADDR="08:00:27:D5:E5:93"

      TYPE="Ethernet"

      [root@vmoe1 network-scripts]# cat ifcfg-eth1

      DEVICE="eth1"

      IPADDR=192.168.56.51

      HWADDR="08:00:27:7C:08:7F"

      TYPE="Ethernet"

      [root@vmoe1 network-scripts]# cat ifcfg-eth2

      DEVICE="eth2"

      IPADDR=192.168.43.51

      HWADDR="08:00:27:E9:E8:99"

      TYPE="Ethernet"

      [root@vmoe1 network-scripts]#

       

      but if I run ifconfig I see that too many IP adresses are allocated:

       

       

      [root@vmoe1 network-scripts]# ifconfig

      eth0      Link encap:Ethernet  HWaddr 08:00:27:D5:E5:93

                inet addr:10.0.2.15  Bcast:10.255.255.255  Mask:255.0.0.0

                inet6 addr: fe80::a00:27ff:fed5:e593/64 Scope:Link

                UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

                RX packets:146 errors:0 dropped:0 overruns:0 frame:0

                TX packets:219 errors:0 dropped:0 overruns:0 carrier:0

                collisions:0 txqueuelen:1000

                RX bytes:11370 (11.1 KiB)  TX bytes:22754 (22.2 KiB)

       

      eth1      Link encap:Ethernet  HWaddr 08:00:27:7C:08:7F

                inet addr:192.168.56.51  Bcast:192.168.56.255  Mask:255.255.255.0

                inet6 addr: fe80::a00:27ff:fe7c:87f/64 Scope:Link

                UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

                RX packets:2982 errors:0 dropped:0 overruns:0 frame:0

                TX packets:2063 errors:0 dropped:0 overruns:0 carrier:0

                collisions:0 txqueuelen:1000

                RX bytes:355353 (347.0 KiB)  TX bytes:478295 (467.0 KiB)

       

      eth1:1    Link encap:Ethernet  HWaddr 08:00:27:7C:08:7F

                inet addr:192.168.56.61  Bcast:192.168.56.255  Mask:255.255.255.0

                UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

       

      eth1:2    Link encap:Ethernet  HWaddr 08:00:27:7C:08:7F

                inet addr:192.168.56.65  Bcast:192.168.56.255  Mask:255.255.255.0

                UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

       

      eth2      Link encap:Ethernet  HWaddr 08:00:27:E9:E8:99

                inet addr:192.168.43.51  Bcast:192.168.43.255  Mask:255.255.255.0

                inet6 addr: fe80::a00:27ff:fee9:e899/64 Scope:Link

                UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

                RX packets:197896 errors:0 dropped:0 overruns:0 frame:0

                TX packets:128717 errors:0 dropped:0 overruns:0 carrier:0

                collisions:0 txqueuelen:1000

                RX bytes:160437548 (153.0 MiB)  TX bytes:62783891 (59.8 MiB)

       

      eth2:1    Link encap:Ethernet  HWaddr 08:00:27:E9:E8:99

                inet addr:169.254.237.102  Bcast:169.254.255.255  Mask:255.255.0.0

                UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

       

      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:32960 errors:0 dropped:0 overruns:0 frame:0

                TX packets:32960 errors:0 dropped:0 overruns:0 carrier:0

                collisions:0 txqueuelen:0

                RX bytes:19428995 (18.5 MiB)  TX bytes:19428995 (18.5 MiB)

       

      [root@vmoe1 network-scripts]#

       

      According to syslog it seems that NTP is using many IP addresses for example 192.168.56.65:

       

      [root@vmoe1 network-scripts]# grep "56.65" /var/log/messages

      Mar 19 14:35:00 vmoe1 ntpd[1545]: Listening on interface #11 eth1:1, 192.168.56.65#123 Enabled

      Mar 19 14:43:23 vmoe1 ntpd[1735]: Listening on interface #12 eth1:2, 192.168.56.65#123 Enabled

      [root@vmoe1 network-scripts]#


       

      Can somebody explain why 192.168.56.65 IP adressed is used by eth1:2  ?