Re: Question re IP address mapping in a RAC environment

Wouldn't that be the VIP of node 2 that's migrated to node 1?

Finn

On Thu, Feb 21, 2008 at 5:38 PM, William Wagman <wjwagman_at_ucdavis.edu> wrote:

> Greetings,
>
> Below is the output from ifconfig -a on one node of a two node RAC
> cluster running Oracle 10.2.0.3.0 EE on RHEL4. I just noticed something
> interesting today. If node 2 of the cluster is down there will appear an
> entry for eth0:2 with IP address for that node, see below. This makes
> sense to me, sort of, in that connections from node 2 must be redirected
> to node 2 and when node 2 comes back up the entry for eth0:2 no longer
> appears. My question, where can I find an explanation/documentation of
> what is occurring here and how it functions? I guess this is what the
> CRS is supposed to be doing, I'm just looking for more detail.
>
> Thanks.
>
> Both nodes up ----------
>
> eth0 Link encap:Ethernet HWaddr 00:11:43:EB:C7:8C
> inet addr:128.120.45.32 Bcast:128.120.45.127
> Mask:255.255.255.128
> inet6 addr: fe80::211:43ff:feeb:c78c/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:1157 errors:0 dropped:0 overruns:0 frame:0
> TX packets:5437 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:122271 (119.4 KiB) TX bytes:619958 (605.4 KiB)
> Interrupt:233
>
> eth0:1 Link encap:Ethernet HWaddr 00:11:43:EB:C7:8C
> inet addr:128.120.45.33 Bcast:128.120.45.127
> Mask:255.255.255.128
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:233
>
> eth1 Link encap:Ethernet HWaddr 00:11:43:EB:C7:8D
> inet addr:192.168.10.156 Bcast:192.168.10.255
> Mask:255.255.255.0
> inet6 addr: fe80::211:43ff:feeb:c78d/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:65825 errors:0 dropped:0 overruns:0 frame:0
> TX packets:23028 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:70736721 (67.4 MiB) TX bytes:10977844 (10.4 MiB)
> Interrupt:50
>
> Added when node 2 unavailable ---------
>
> eth0:2 Link encap:Ethernet HWaddr 00:0F:1F:69:6B:A1
> inet addr:128.120.45.31 Bcast:128.120.45.127
> Mask:255.255.255.128
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:233
>
> Bill Wagman
> Univ. of California at Davis
> IET Campus Data Center
> wjwagman_at_ucdavis.edu
> (530) 754-6208
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>

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