Filter
Top Products
78 SANRAD V-Switch User Manual
Working with SCSI Storage Devices
The V-Switch default SCSI bus ID is 7. If your storage cluster includes SCSI
storage devices, one of the V-Switch’s default SCSI bus ID must be changed.
They cannot both be 7 on the same SCSI bus. Use the CLI command pscsi
set busid to change the SCSI bus ID on one of the V-Switches.
pscsi set busid
SWITCH PARAMETER DEFINITION STATUS EXAMPLE
-if
INTERFACE STORAGE PORT
NUMBER
/ALIAS
MANDATORY
pscsi3
-id
ID PSCSI ID NUMBER
BETWEEN
0 AND 15
MANDATORY
12
Example
pscsi set busid if pscsi3 –id 12
Maintaining Cluster Communications
Once a V-Switch knows that it has a neighbor, it begins sending out a
regular keep alive signal to its neighbor that it is on-line. The V-Switch also
begins listening for the keep alive signal from its neighbor. The keep alive
signal is transmitted through all connecting paths between each neighbor.
Thus, if one path fails, the remaining path(s) will still carry the keep alive
signal.
If a specified time period passes without a keep alive signal from the
neighbor, a suspicious interval, measured in seconds, is entered. The V-
Switch suspects that its neighbor has gone off-line and begins preparing to
activate the neighbor IP addresses to take over volume exposure.
If a keep alive signal is received during the suspicious interval, the timer is
reset and the V-Switch continues to function as usual. If a keep alive signal
is not received by the end of the suspicious interval, a dead interval is
entered. At the end of the dead interval, the neighboring V-Switch is
considered off-line, the failover process is initiated and the on-line V-Switch
actives the neighbor IP addresses and takes over volume exposure.
Use the CLI command cluster show to view the keep alive parameters of
a cluster.
cluster show
Last Keep Alive KeepAlive Int(s) Susp Int(s) Dead Int(s)
1 2 6 10