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
iSLB Configuration Prerequisites
Perform the following prerequisite actions prior to configuring iSLB:
About iSLB Initiators
iSLB initiators provide the following features in addition to those supported by iSCSI initiators:
Configuring iSLB Initiators
This section includes the following topics:
OL-16184-01, Cisco MDS SAN-OS Release 3.x
The maximum number of switches in a fabric that can have iSLB with CFS distribution enabled is
No more than 200 new iSLB initiators can be added to the pending configuration. Before adding
more initiators, you must commit the configuration.
You cannot disable iSCSI if you have more than 200 iSLB initiators in the running configuration.
Reduce the number of iSLB initiators to fewer than 200 before disabling iSCSI.
iSLB can be used without CFS distribution but if iSLB auto-zone feature is used, traffic is disrupted
when any zoneset is activated.
If IVR and iSLB features are enabled in the same fabric, you should have at least one switch in the
fabric where both these features are enabled. Any zoning-related configuration and activation (for
normal zones, IVR zones, or iSLB zones) must be performed on this switch. Otherwise, there may
be traffic disruption in the fabric.
Enable iSCSI (see the
"Enabling iSCSI" section on page
Configure the Gigabit Ethernet interfaces (see the
section on page 45-2
Configure the VRRP groups (see the
Configure and activate a zone set (see
Enable CFS distribution for iSLB (see the
An iSLB initiator also supports iSLB virtual targets. These targets are very similar to iSCSI virtual
targets with the exception that they do not include the advertise interface option and as a result are
distributable using CFS.
Initiator targets–—These targets are configured for a particular initiator.
Load balancing using iSCSI login redirect and VRRP—If load balancing is enabled, the IPS
Manager redirects incoming sessions to the best interface based on the calculated load for each
Configuration distribution to other switches using CFS.
Configuring iSLB Initiator Names or IP Addresses, page 42-42
Assigning WWNs to iSLB Initiators, page 42-43
Making the Dynamic iSLB Initiator WWN Mapping Static, page 42-43
"Basic Gigabit Ethernet Configuration for IPv4"
Configuring Basic Connectivity for IPv6, page
"Configuring Load Balancing Using VRRP" section on
Chapter 23, "Configuring and Managing
"Enabling iSLB Configuration Distribution" section on
Cisco MDS 9000 Family CLI Configuration Guide