Lun Trespass For Storage Port Failover - Cisco MDS 9000 series Configuration Manual

iSCSI High Availability
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Command
Step 3
switch(config-iscsi-tgt)# pwwn 26:00:01:02:03:04:05:06
switch(config-iscsi-tgt)# pwwn 26:00:01:02:03:04:05:06
secondary-pwwn 26:00:01:02:03:10:11:12
switch(config-iscsi-tgt)# pwwn 26:00:01:02:03:04:05:06
fc-lun 0x1 iscsi-lun 0x0 sec-lun 0x3
switch(config-iscsi-tgt)# no pwwn 26:00:01:02:03:04:05:06
Step 4
switch(config-iscsi-tgt)# revert-primary-port
Step 5
switch(config-iscsi-tgt)# no revert-primary-port

LUN Trespass for Storage Port Failover

In addition to the high availability of statically imported iSCSI targets, the trespass feature is available
to enable the move of LUs, on an active port failure, from the active to the passive port of a statically
imported iSCSI target.
In physical Fibre Channel targets, which are configured to have LUs visible over two Fibre Channel N
ports, when the active port fails, the passive port takes over. Some physical Fibre Channel targets require
that the trespass feature be used to move the LUs from the active port to the passive port. A statically
imported iSCSI target's secondary pWWN option and an additional option of enabling the trespass
feature is available for a physical Fibre Channel target with redundant ports. When the active port fails,
the passive port becomes active, and if the trespass feature is enabled, the Cisco MDS switch sends a
request to the target to move the LUs on the new active port. The iSCSI session switches to use the new
active port and the moved LUs are accessed over the new active port (see
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
4-62
Chapter 4 Configuring iSCSI
Purpose
Configures the primary port for
this virtual target.
Configures the primary and
secondary ports for this virtual
target.
Configures the primary port for
this virtual target with LUN
mapping and different LUN on the
secondary Fibre Channel port.
The CLI interprets the
Note
LUN identifier value as a
hexadecimal value
whether or not the 0x
prefix is included.
Removes the primary port,
secondary port, and LUN mapping
configuration for this virtual
target.
Configures the session failover
redundancy for this virtual-target
to switch all sessions back to
primary port when the primary
port comes back up.
Directs the switch to continue
using the secondary port for
existing sessions and to use the
primary port for new sessions
(default).
Figure 4-17).
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)