How to restart Global Atomic Broadcast (GAB) and Low Latency Transport (LLT) without rebooting the system

Article:TECH9070  |  Created: 2000-01-27  |  Updated: 2010-01-14  |  Article URL http://www.symantec.com/docs/TECH9070
Article Type
Technical Solution

Product(s)

Environment

Issue



How to restart Global Atomic Broadcast (GAB) and Low Latency Transport (LLT) without rebooting the system

Error



1) gabconfig only show no membership or one membership; and gabconfig -c -x and lltconfig -c
can not restart the gab and llt.
2) gab hang

Solution



In order for the GAB and LLT kernel modules to be restarted,  they must first be stopped and removed from the system.

1. Stop HAD,  to have the services running,  use the "-force" option:

#hastop -local

2. Stop GAB and remove this node from cluster port a:

#gabconfig -U

3. Stop LLT and remove the node from the cluster completely:

#lltconfig -U
lltconfig: this will attempt to stop and reset LLT. Confirm (y/n)? y
#

4. Locate the module ID for LLT and GAB:

#modinfo | egrep 'llt|gab'
90 78198000  1618c 141  1  llt (LowLatencyTransport 1.3.0)
109 78254000  6b48a 140  1  gab (GAB device 1.3.0)

5. Unload the drivers, starting with the GAB driver:

#modunload -i 109
#modunload -i 90

6. Restart the LLT and GAB drivers, LLT first:

#/etc/rc2.d/S70llt start
Starting LLT
#/etc/rc2.d/S92gab start
Start GAB
#

The kernel drivers LLT and GAB have been restarted.

7. Restart VERITAS Cluster Server (VCS):

# hastart



Legacy ID



233032


Article URL http://www.symantec.com/docs/TECH9070


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