help:a question about oracle ha on redhat as
 

hello everyone!

i have configured a two nodes redhat cluster (with clumanager),and oracle ha (database files,redo files,undo files and control files on HP MSA 500G2).when i shutdown the active node,the standby node can take-over the shared resource,but when i ifconfig eth0 down(eth1 is heartbeat),i found the standby node can not take-over the shared resource.

would someone give me any suggestion!thankyou very much!