Quick Reboot of Nodes causing GAB b port offline in both the hosts

[SanjeevRai]

I am having a Cluster of two Nodes HPUX 11.31 with SF 5.1SP1RP3 installed when I am trying to reboot the cluster with all private links down using reboot -qnr command its causing some GAB ports to go offline 

Before Quick reboot :

GAB Port Memberships

===============================================================

Port a gen   725f03 membership 01

Port b gen   725f02 membership 01

Port d gen   725f01 membership 01

Port f  gen   725f10 membership 01

Port h gen   725f06 membership 01

Port o gen   725f04 membership 01

Port u gen   725f0d membership 01

Port v gen    725f08 membership 01

Port w gen   725f0a membership 01

And After Quick Reboot :

GAB Port Memberships

===============================================================

Port a gen   861801 membership 0

Port d gen   861805 membership 0

Port h gen   861804 membership 0

Port o gen   861803 membership 0

Vita fails to find b ports on both the nodes.

and to bring the cluster up again i need to do normal reboot both the host again 

Is anyone familiar with this issue?

[Marianne]

Can you check and confirm that GAB startup scripts and config files are in place on all nodes?

/sbin/rc2.d/S920gab

/sbin/init.d/gab 

/etc/gabtab

/etc/rc.config.d/gabconf

[SanjeevRai]

I have checked and GAB startup scripts and config files are in place on all nodes.

dont know what causing all other GAB ports to go down when both nodes reboots with all private network links down.

[Marianne]

Can you confirm that /sbin/rc2.d/S920gab has big "S" and not small "s" starting the S920gab filename?

Does gab startup fine when you manually run /etc/gabtab ?

Have you checked /var/adm/syslog/syslog.log to see if there was an attempt to start gab after llt?