Islb Configuration Prerequisites; About Islb Initiators; Configuring Islb Initiators - Cisco MDS 9000 series Configuration Manual

Chapter 4 Configuring iSCSI
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-19525-01,Cisco MDS NX-OS Release 4.2(1)
The maximum number of switches in a fabric that can have iSLB with CFS distribution enabled is
four.
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 4-4
Configure the Gigabit Ethernet interfaces (see the and
IPv4" section on page 7-2).
Configure the VRRP groups (see the
page 4-54).
Configure and activate a zone set (see the Cisco MDS 9000 Family NX-OS Fabric Configuration
Guide for more information).
Enable CFS distribution for iSLB (see the
page 4-56).
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
interface.
Configuration distribution to other switches using CFS.
Configuring iSLB Initiator Names or IP Addresses, page 4-42
Assigning WWNs to iSLB Initiators, page 4-43
for more information).
the"Basic Gigabit Ethernet Configuration for
"Configuring Load Balancing Using VRRP" section on
"Enabling iSLB Configuration Distribution" section on
Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
Configuring iSLB
4-41