Promise Technology 2-Year Extended Warranty for VessR2000 RAID Head - Manual (Page 301)

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Vess R2000 Series Product Manual Promise Technologies
r
edundAnt POrt cOnfigurAtiOn fOr
nAs
And i
scsi
Use of redundancy will prevent disconnection in the event of a port failure on a controller or cable failure. For
dual controller subsystems, the iSCSI protocol already has Multipath I/O for redundancy and load balancing.
However for NAS it is necessary to create a port trunk to achieve this. Further redundancy is created with more
advanced cabling and two switches or routers, and with redundant IP settings.
The first method of redundancy using a single switch or router, uses that same basic cabling arrangement as
illustrated in the previous example except that two ports on each controller are trunked and assigned a NAS
portal. This example is explained in “Table 2: Redundant portal settings” below and illustrated in “Redundancy
with port configuration”.
Table 2: Redundant portal settings
Controller ID 1 2
Port ID 1 2 3 4 1 2 3 4
Trunk 1 2 Trunk 1 1 2 Trunk 1
iSCSI Portal ID 1 2 X 3 4 X
NAS Portal ID X X 16 X X If failover = NAS
Portal ID 16
Note
The I/O Network Management and iSCSI Management menus
for SAN configuration used to configure redundancies for multiple iSCSI
target and ports.