Hello,

I found the following entries in /var/log/messages:

Node1:

Jun 23 13:34:29 evg60lx-stnet-oracle-rac1 su(pam_unix)[11130]: session opened for user oracle by (uid=0)
Jun 23 13:34:29 evg60lx-stnet-oracle-rac1 su(pam_unix)[11130]: session closed for user oracle
Jun 23 13:34:30 evg60lx-stnet-oracle-rac1 kernel: o2net: connection to node evg60lx-stnet-oracle-rac2 (num 1) at 172.18.0.252:7777 has been idle for 10.0 seconds, shutting it down.
Jun 23 13:34:30 evg60lx-stnet-oracle-rac1 kernel: (0,0)2net_idle_timer:1418 here are some times that might help debug the situation: (tmr 1214246060.533338 now 1214246070.533571 dr 1214246060.533329 adv 1214246060.533339:1214246060.533339 func (bc55c001:504) 1214238801.75265:1214238801.75271)
Jun 23 13:34:30 evg60lx-stnet-oracle-rac1 kernel: o2net: no longer connected to node evg60lx-stnet-oracle-rac2 (num 1) at 172.18.0.252:7777
Jun 23 13:34:30 evg60lx-stnet-oracle-rac1 su(pam_unix)[11179]: session opened for user oracle by (uid=0)

Node2:

Jun 23 13:34:30 evg60lx-stnet-oracle-rac2 su(pam_unix)[5422]: session closed for user oracle
Jun 23 13:34:30 evg60lx-stnet-oracle-rac2 kernel: o2net: no longer connected to node evg60lx-stnet-oracle-rac1 (num 0) at 172.18.0.250:7777
Jun 23 13:34:31 evg60lx-stnet-oracle-rac2 su(pam_unix)[5471]: session opened for user oracle by (uid=0)

I am not sure what this means (especially o2net). I am looking into it now.
Could you please shed more light on the above messages?

Thanks again for the kind help.

Suhas