On 24/01/2013 15:59, Lu Jiang wrote: > Thanks Phil. In our this environment eth1 is for private interface. eth0 is > for public interfaces. > Does this mean something may be wrong with the private IP addresses? > Hi, I think the configuration of eth1:1 is correct: eth1:1 Link encap:Ethernet HWaddr 00:50:56:9A:00:88 inet addr:169.254.203.77 Bcast:169.254.255.255 Mask:255.255.0.0 See 11gR2 Grid Infrastructure Redundant Interconnect and ora.cluster_interconnect.haip [ID 1210883.1]: Grid automatically picks free link local addresses from reserved 169.254.*.* subnet for HAIP. According to RFC-3927, link local subnet 169.254.*.* should not be used for any other purpose. This is from one of our clusters: [xxxx ~]$ /sbin/ifconfig | grep -B1 -A1 169 bond1:1 Link encap:Ethernet HWaddr 00:19:99:BA:AE:CE inet addr:169.254.50.253 Bcast:169.254.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 Regards Dimitre -- //www.freelists.org/webpage/oracle-l