Veritas Storage Foundation 5.1 SP1 Cluster File System Administrator"s Guide (5900-1738, April 2011)

Moreover, both /etc/vxfenmode and /etc/vxfentab files contain additional
parameter "security" which indicates if communication between CP server and
SFCFS cluster nodes is secure.
Figure 2-2 displays a schematic of the customized fencing options.
Figure 2-2
Customized fencing
Client cluster node
CP serverSCSI-3 LUN
Customized
Scripts
LLT
User space
Kernel space
cpsadm
vxfenadm
vxfend
VXFEN
GAB
A user level daemon vxfend interacts with the vxfen driver, which in turn interacts
with GAB to get the node membership update. Upon receiving membership updates,
vxfend invokes various scripts to race for the coordination point and fence off
data disks. The vxfend daemon manages various fencing agents. The customized
fencing scripts are located in the /opt/VRTSvcs/vxfen/bin/customized/cps
directory.
The scripts that are involved include the following:
Storage Foundation Cluster File System architecture
About I/O fencing
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