Configuring Islb - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Chapter 50 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
Changing the forwarding mode of an iSCSI interface that is part of an iSLB VRRP group impacts load
Caution
balancing on the interface. See the
Balancing" section on page

Configuring iSLB

The iSCSI server load balancing (iSLB) feature provides a means to easily configure large scale iSCSI
deployments containing hundreds or even thousands of initiators. When not using iSLB, configuring
iSCSI requires the following:
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iSLB provides the following features:
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This section covers the following topics:
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OL-17256-03, Cisco MDS NX-OS Release 4.x
50-45.
You need to perform multiple configuration steps on the MDS switch, including the following:
Initiator configuration using static pWWN and VSAN.
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Zoning configuration for initiators and targets.
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Optional create virtual target and give access to the initiator.
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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 50-36
iSLB Configuration Prerequisites, page 50-36
About iSLB Initiators, page 50-37
Configuring iSLB Using Device Manager, page 50-37
Configuring iSLB Initiators, page 50-39
About Load Balancing Using VRRP, page 50-43
Configuring Load Balancing Using VRRP, page 50-45
About iSLB Configuration Distribution Using CFS, page 50-46
"Changing iSCSI Interface Parameters and the Impact on Load
Cisco MDS 9000 Family Fabric Manager Configuration Guide
Configuring iSLB
50-35