Installation guide

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Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(6)
OL-27554-01
New Features in Cisco MDS NX-OS Release 5.2
Smart Zoning
Cisco smart zoning simplifies zoning to reduce the burden on administrators and enable automation of
SAN provisioning without affecting SAN hardware resource consumption. When the smart zoning
feature is enabled, Cisco MDS 9000 Family fabrics provision the hardware access control entries
specified by the zone set more efficiently. Administrators can define zones as one-to-many, or
many-to-many without incurring a penalty in switch resource consumption. As a result, zones can be
defined to correspond to entities that are meaningful in their data center operations. For example, they
can define a zone for an application, or for an application cluster, or for a hypervisor cluster without
compromising internal resource utilization.
Follow these guidelines for smart zoning:
• Smart zoning requires that all Cisco MDS 9000 Family switches in the fabric use Cisco MDS 9000
NX-OS Software Release 5.2(6) or later and have the smart zoning feature enabled.
• Smart zoning cannot be enabled if the fabric contains third-party switches or switches running
earlier versions of Cisco MDS 9000 NX-OS or SAN-OS software.
• Once you enable smart zoning, you cannot add a switch to the fabric that does not support smart
zoning.
• Before downgrading from a switch that has smart zoning enabled, disable smart zoning on all
VSANs; otherwise, the downgrade is disruptive.
Note Smart zoning is not supported in a fabric if DMM, IOA, or SME is running. Do not enable smart zoning
on a switch where DMM, IOA, or SME is configured.
For additional information on how to implement and configure Smart Zoning, see the Cisco MDS 9000
Fabric Configuration Guide.
Storage Media Encryption Features
Cisco NX-OS Release 5.2(6) includes the following enhancements to Cisco Storage Media Encryption
(SME) Disk:
– SME Disk now supports greater than 2 TB LUNs for both signature and non-signature mode.
– SME Disk signature mode allows snapshots of a crypto LUN across key change operations.
– SME Disk signature mode automatically recognizes snapshots that are exposed to the host,
based on the media signature.
– SME Disk now supports Master Key Rekey (MKR) on a cluster for both signature and
non-signature mode.
These enhancements require Cisco NX-OS Release 5.2(6) and Cisco DCNM Release 6.1(1a). For more
information on these feature enhancements, see the Cisco MDS 9000 Family NX-OS Storage Media
Encryption Configuration Guide.
New Features in Cisco MDS NX-OS Release 5.2(2d)
Cisco MDS NX-OS Release 5.2(2d) is a maintenance release that includes bug fixes. It does not include
any new features.