Cisco AJ732A - MDS 9134 Fabric Switch Release Note page 34

New Features in Cisco MDS NX-OS Release 4.1(3a)
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 o m .
Port Guard
Starting from NX-OS 4.1(3a), you can hold a port down after a failure or a series of flaps that are rapid
enough to exceed a configured threshold. This capability can help keep the malfunctioning port down to
avoid a flood of error reports.
Cisco Data Mobility Manager Enhancements
Cisco MDS NX-OS Release 4.1(3a) includes several enhancements to Cisco Data Mobility Manager
(DMM).
Cisco Data Mobility Manager Method 3
Cisco Data Mobility Manger (DMM) is a feature that enables online migration of data from an existing
storage array LUN to a new storage array LUN. Currently, there are two different methods available for
the administrator to use this feature: method 1 and method 2. Method 1 provides synchronous replication
for local and metro distances; Method 2 provides asynchronous replication that optimizes performance
across a WAN link. Both these existing methods work in a dual fabric SAN topology. However there are
customer topologies where a third SAN (or VSAN) is used to migrate the data from the existing to the
new storage LUNs. Prior implementations of Cisco DMM did not support such three SAN (or VSAN)
topologies. Cisco Data Mobility Manager Method 3 is a new method introduced in Cisco NX-OS Release
4.1(3a), that enables DMM to be used in topologies where there is a Dual Fabric SAN for
server-to-storage Fibre Channel traffic and a third SAN (or VSAN) for migration traffic.
DMM Method 3 is available only on the MDS 900018/4-Port Multiservice Module (MSM-18/4).
Support for DMM on the MDS 9222i Switch
Starting with Cisco NX-OS Release 4.1(3a), the MDS 9222i Multiservice Modular Switch supports
Cisco DMM without requiring an SSM module in the MDS 9222i switch.
Cisco Storage Media Encryption Enhancements
Cisco MDS NX-OS Release 4.1(3a) includes several enhancements to Cisco Storage Media Encryption
(SME).
Media Key Auto-replication
Key replication is required to allow the same tape media to be accessed by more than one Cisco SME
cluster. In most cases, these SME clusters are located in different locations, such as a primary data center
and a disaster recovery site. Prior to Cisco NX-OS Release 4.1(3a), the key replication process required
a manual export and import procedure, which limited the usefulness of the feature. Starting with NX-OS
Release 4.1(3a), SME users can set up automatic replication of media keys from a Cisco SME cluster to
one or more other clusters. Cisco SME media key auto-replication is configured on a per tape volume
group basis.
The auto-replication source and destination clusters must be managed by a single Cisco Key
Note
Management Center (KMC).
Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 4.1(3a)
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