Node1 is down from production in RAC

Dear all,
We have two nodes Oracle RAC 10gr2. Due to bug in network package, we happen to update node1 OS ( 2.6.9.42 to 2.6.9.55 ) by investigation with OS team, Now both node having kernel difference as above, node2 is older and node1 is little higher, node1 isolated from production,
We need to bring node1 in production or what are other solution to over come kernel version difference.
Problem: Now the node1 is down from production its kernel is new from node2.
What will be the solution of this to bring node1 up?
Old (up)
[oracle@node2 ~]$ uname -r
2.6.9-42.0.10.ELsmp
[oracle@node2 ~]$ uname -a
Linux node2 2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:13:42 EST 2007 x86_64 x86_64 x86_64 GNU/Linux
new kernal ( down )
[root@node1 ~]# uname -r
2.6.9-55.ELsmp
[root@node1 ~]# uname -a
Linux node1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 16:36:54 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
I need you guys assistance.
Thanks,

Hi,
We have two nodes Oracle RAC 10gr2. Due to bug in network package, we happen to update node1 OS ( 2.6.9.42 to 2.6.9.55 ) by investigation with OS team, Now both node having kernel difference as above, node2 is older and node1 is little higher, node1 isolated from production, As your OS support carried out the research why can't you opt for scheduled restart of RAC instances. Certainly I am not sure what might have happen at your end.
Problem: Now the node1 is down from production its kernel is new from node2.As your new Kernel is up and running, does you OS comes up, then try to check whether at initial stage cluster services up and running or not ?
If not then try to check intially as you stated across bug in network whether it got resolved or not, If yes, then go head with Oracle dependent services are able to come up to not. Difference/Issue in network would not drop the network communication perhaps it would have been effected network transfers band width.
Any how, Once you cluster can up then carry on with proper shutdown of node2 and patch it up.
- Pavan Kumar N

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