About Islb Configuration Limits - Cisco MDS 9000 series Configuration Manual

Configuring iSLB
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
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iSLB provides the following features:
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This section covers the following topics:
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Before configuring iSLB, you must enable iSCSI (see the
Note
For iSLB, all switches in the fabric must be running Cisco MDS SAN-OS Release 2.1(1a) or later.
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About iSLB Configuration Limits

iSLB configuration has the following limits:
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Cisco MDS 9000 Family NX-OS IP Services Configuration Guide
4-40
Configuration of target LUN mapping and masking on the storage system for the initiator based
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on the static pWWN created for the initiator on the MDS switch.
You need to duplicate the configuration manually on multiple MDS switches.
There is no load balancing for IPS ports. For example:
The Virtual Router Redundancy Protocol (VRRP) only supports active and backup, not load
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balancing.
You must use multiple VRRP groups and configure hosts in different groups.
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The iSLB initiator configuration is simplified with support for initiator targets and auto-zones.
Cisco Fabric Services (CFS) eliminates the need for manual configuration by distributing the iSLB
initiator configuration among all MDS switches in the fabric.
Only statically mapped iSLB initiator configuration is distributed throughout the fabric
Note
using CFS. Dynamically and statically mapped iSCSI initiator configurations are not
distributed.
Dynamic load balancing of iSLB initiators is available using iSCSI login redirect and VRRP.
About iSLB Configuration Limits, page 4-40
iSLB Configuration Prerequisites, page 4-41
About iSLB Initiators, page 4-41
Configuring iSLB Initiators, page 4-41
About Load Balancing Using VRRP, page 4-49
Configuring Load Balancing Using VRRP, page 4-54
About iSLB Configuration Distribution Using CFS, page 4-55
Distributing the iSLB Configuration Using CFS, page 4-55
The maximum number of iSLB and iSCSI initiators supported in a fabric is 2000.
The maximum number of iSLB and iSCSI sessions supported by an IPS port in either transparent or
proxy initiator mode is 500.
The maximum number of iSLB and iSCSI sessions supported by a switch is 5000.
The maximum number of iSLB and iSCSI targets supported in a fabric is 6000.
Chapter 4
"Enabling iSCSI" section on page
OL-19525-01,Cisco MDS NX-OS Release 4.2(1)
Configuring iSCSI
4-4).